Vertiv M830B User manual

NetSure™ Control Unit (NCU)
Controller
User Manual
Specification Number: 1M830BNA, 1M830DNA
Model Number: M830B, M830D
Software Version 1.2.30

Vertiv™ NetSure™ Control Unit (NCU) User Manual
Vertiv™ NetSure™ Control Unit (NCU) User Manual
The information contained in this document is subject to change without
notice and may not be suitable for all applications. While every precaution has
been taken to ensure the accuracy and completeness of this document, Vertiv
assumes no responsibility and disclaims all liability for damages resulting from
use of this information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods, tools, and
materials to be used in performing procedures not specifically described in
this document.
The products covered by this instruction manual are manufactured and/or
sold by Vertiv. This document is the property of Vertiv and contains
confidential and proprietary information owned by Vertiv. Any copying, use or
disclosure of it without the written permission of Vertiv is strictly prohibited.
Names of companies and products are trademarks or registered trademarks of
the respective companies. Any questions regarding usage of trademark
names should be directed to the original manufacturer.
Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent section of this
manual to see if the issue can be resolved by following outlined procedures.
Visit https://www.vertiv.com/en-us/support/ for additional assistance.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
iii
TABLE OF CONTENTS
Admonishments Used in this Document....................................................................................................................... viii
Important Safety Instructions ............................................................................................................................................ ix
Static Warning .......................................................................................................................................................................... x
1Introduction ......................................................................................................................................................................... 1
1.1 Preface ...................................................................................................................................................................................................................................................................................1
1.2 Overview.................................................................................................................................................................................................................................................................................1
1.3 Function Descriptions...............................................................................................................................................................................................................................................2
1.3.1 Rectifier, Solar Converter, and Converter Control ...................................................................................................................................................2
1.3.2 System Components Monitoring and System Alarms Generation ..........................................................................................................2
1.3.3 Operating Data Acquisition and Data Logs...................................................................................................................................................................3
1.3.4 Battery Management ..........................................................................................................................................................................................................................4
1.3.5 Energy Management...........................................................................................................................................................................................................................8
1.3.6 Power Split Feature ..............................................................................................................................................................................................................................9
1.3.7 AC Generator Function.....................................................................................................................................................................................................................9
1.3.8 Diesel Management Feature.....................................................................................................................................................................................................10
1.3.9 Hybrid Control Function (Supporting Generator, Solar and Wind Energy Input, and Optimization)....................10
1.3.10 Supervisory Module (SM Modules) Monitoring......................................................................................................................................................14
1.3.11 Maximum Current Limit Function........................................................................................................................................................................................14
1.3.12 Communications Function..........................................................................................................................................................................................................14
1.3.13 FIAMM SoNick (Sodium Nickel) battery Interface................................................................................................................................................15
1.3.14 Radius Server Feature......................................................................................................................................................................................................................15
2Operation............................................................................................................................................................................17
2.1 Controller Initialization ...........................................................................................................................................................................................................................................17
2.2 Local Indicators ...........................................................................................................................................................................................................................................................18
2.3 Using the Local Keypad and Display.......................................................................................................................................................................................................19
2.3.1 Local Menu Navigation Keys and Local Display....................................................................................................................................................19
2.3.2 Local Display Menus ........................................................................................................................................................................................................................19
2.4 Using the Web Interface.....................................................................................................................................................................................................................................20
2.4.1 Overview .....................................................................................................................................................................................................................................................20
2.4.2 Multiple Browsers Supported..................................................................................................................................................................................................20
2.4.3 Web Interface Screens ..................................................................................................................................................................................................................20
2.5 Passwords and Privilege Levels..................................................................................................................................................................................................................20
2.6 Multiple Languages Supported ...................................................................................................................................................................................................................20
2.7 Setup Procedures.....................................................................................................................................................................................................................................................20
2.7.1 Setting IPv4 Communications Parameters (if controller not set as DHCP)................................................................................20
2.7.2 Setting IPv6 Communications Parameters (if controller not set as DHCPv6)...........................................................................21
2.7.3 Setting for DHCP and DHCPv6 ..............................................................................................................................................................................................21
2.7.4 Connecting the Controller to your Local Area Network (LAN) when the System is NOT Equipped
with an IB4 Board..................................................................................................................................................................................................................................21
2.7.5 Connecting the Controller to your Local Area Network (LAN) when the System IS Equipped with an
IB4 Board.....................................................................................................................................................................................................................................................22
2.7.6 Connecting a Local Computer Directly to the Controller when the System is NOT Equipped with an
IB4 Board.....................................................................................................................................................................................................................................................22

Vertiv™ NetSure™ Control Unit (NCU) User Manual
iv
2.7.7 Connecting a Local Computer Directly to the Controller when the System IS Equipped with an IB4
Board..............................................................................................................................................................................................................................................................24
2.7.8 Disabling Proxy Server Settings to Enable a Connection to the Controller over an Intranet Network
(if required) ..............................................................................................................................................................................................................................................24
2.7.9 Internet Security Settings for Loading Files or Downloading Files into the NCU...................................................................25
2.8 Logging into the Controller via Web Interface Access...........................................................................................................................................................29
2.9 Common Tasks Performed via the Local Keypad and/or Web Interface...............................................................................................................31
2.9.1 General...........................................................................................................................................................................................................................................................31
2.9.2 Start Wizard...............................................................................................................................................................................................................................................31
2.9.3 Reset Admin Password Feature..............................................................................................................................................................................................31
2.9.4 Viewing Alarms.......................................................................................................................................................................................................................................31
2.9.5 Viewing System Status....................................................................................................................................................................................................................31
2.9.6 Viewing the NCU Controller’s Device Inventory......................................................................................................................................................31
2.9.7 Clearing or Resetting Alarms....................................................................................................................................................................................................32
2.9.8 Clearing Logs ..........................................................................................................................................................................................................................................32
2.9.9 Changing the Local LCD Display Orientation...........................................................................................................................................................32
2.9.10 Disabling the Local Keypad Sound.....................................................................................................................................................................................32
2.9.11 Blocking Alarms ....................................................................................................................................................................................................................................32
2.9.12 Changing the Date and Time...................................................................................................................................................................................................32
2.9.13 Adding, Deleting, and Modifying Users...........................................................................................................................................................................33
2.9.14 Setting IP Communications Parameters (if controller not set as DHCP or DHCPv6)........................................................33
2.9.15 Setting for DHCP and DHCPv6 .............................................................................................................................................................................................33
2.9.16 Setting SNMP Parameters.........................................................................................................................................................................................................34
2.9.17 Setting TL1 Parameters................................................................................................................................................................................................................34
2.9.18 Setting Auto Equalize.....................................................................................................................................................................................................................34
2.9.19 Programming the Audible Alarm Feature.....................................................................................................................................................................35
2.9.20 Manually Forcing LVDs..................................................................................................................................................................................................................35
2.9.21 Manually Forcing Relays...............................................................................................................................................................................................................35
2.9.22 Assigning Severity Level to Alarms...................................................................................................................................................................................36
2.9.23 Assigning Relays to Alarms.......................................................................................................................................................................................................36
2.9.24 Placing the System in Float or Equalize Charge Mode...................................................................................................................................36
2.9.25 Viewing/Changing the Float Voltage Setting...........................................................................................................................................................36
2.9.26 Viewing/Changing the Equalize Voltage Setting..................................................................................................................................................36
2.9.27 Setting Battery Parameters.......................................................................................................................................................................................................36
2.9.28 Setting Battery Capacity Parameters..............................................................................................................................................................................36
2.9.29 Setting Rectifier High Voltage Shutdown.....................................................................................................................................................................37
2.9.30 Setting Solar Converter High Voltage Shutdown .................................................................................................................................................37
2.9.31 Setting Rectifier Current Limit................................................................................................................................................................................................37
2.9.32 Checking the Controller’s Current Limit Point after Adding or Removing a Rectifier or Converter
Module...........................................................................................................................................................................................................................................................37
2.9.33 Enabling Solar Mode.........................................................................................................................................................................................................................38
2.9.34 Setting Over Voltage Alarm 1...................................................................................................................................................................................................38
2.9.35 Setting Over Voltage Alarm 2..................................................................................................................................................................................................38
2.9.36 Setting Under Voltage Alarm 1 ...............................................................................................................................................................................................38
2.9.37 Setting Under Voltage Alarm 2...............................................................................................................................................................................................38

Vertiv™ NetSure™ Control Unit (NCU) User Manual
v
2.9.38 Setting Temperature Sensors ................................................................................................................................................................................................39
2.9.39 Setting Battery Charge Temperature Compensation......................................................................................................................................40
2.9.40 Setting Battery Thermal Runaway Management (BTRM) Feature.....................................................................................................40
2.9.41 Configuring the NCU Identification of Rectifiers and Assigning which Input Feed is Connected to the
Rectifiers......................................................................................................................................................................................................................................................41
2.9.42 Configuring the NCU Identification of Solar Converters ................................................................................................................................41
2.9.43 Configuring the NCU Identification of Converters...............................................................................................................................................41
2.9.44 Setting Digital Inputs.......................................................................................................................................................................................................................42
2.9.45 Setting Battery Block and Battery Midpoint Monitoring (if equipped with an EIB Assembly)................................... 42
2.9.46 Setting External Shunts (connected to the EIB Assembly)........................................................................................................................ 42
2.9.47 Setting External Shunts (connected to the SMDU+ Assembly)............................................................................................................43
2.9.48 Setting Shunts (connected to the SMDU Assembly).......................................................................................................................................43
2.9.49 Setting the SM-DUE Parameters (if furnished)......................................................................................................................................................44
2.9.50 Setting the System Current Alarm.....................................................................................................................................................................................46
2.9.51 Setting the AC Generator Function...................................................................................................................................................................................46
2.9.52 Using the Relay Test Feature .................................................................................................................................................................................................46
2.9.53 Clearing the Maintenance Alarm ..........................................................................................................................................................................................47
2.9.54 Performing a Manual Battery Discharge Test ..........................................................................................................................................................47
2.9.55 Updating the NCU Controller’s Device Inventory ................................................................................................................................................48
2.9.56 Backing Up the NCU Configuration..................................................................................................................................................................................48
2.9.57 Reloading a Backed-Up NCU Configuration.............................................................................................................................................................48
2.9.58 Upgrading the NCU Using an Application ("All") Package ..........................................................................................................................49
2.9.59 Restoring Factory Default Configuration .....................................................................................................................................................................49
2.9.60 Rebooting the Controller.............................................................................................................................................................................................................50
2.9.61 Changing the Names of Items Displayed in the LCD and Web-Interface Menus..................................................................50
2.9.62 Upgrading the Rectifiers Firmware....................................................................................................................................................................................50
2.10 Power Split Feature...................................................................................................................................................................................................................................................51
2.10.1 Overview .......................................................................................................................................................................................................................................................51
2.11 FIAMM SoNick (Sodium Nickel) Batteries Interface.................................................................................................................................................................57
2.11.1 FIAMM Battery Installation and User Instructions................................................................................................................................................57
2.12 TL1 Interface..................................................................................................................................................................................................................................................................59
2.12.1 General .........................................................................................................................................................................................................................................................59
2.12.2 NCU TL1 Feature................................................................................................................................................................................................................................60
2.13 Machine-to-Machine HTTP Interface ...................................................................................................................................................................................................60
2.13.1 Description ...............................................................................................................................................................................................................................................60
2.13.2 Using the Machine-to-Machine HTTP Interface Option...............................................................................................................................60
2.13.3 EXAMPLE ..................................................................................................................................................................................................................................................63
2.14 Resolving Alarms.......................................................................................................................................................................................................................................................63
3Local Display Menus ......................................................................................................................................................85
3.1 Overview............................................................................................................................................................................................................................................................................85
3.2 Menus ..............................................................................................................................................................................................................................................................................85
3.2.1 Factory Default Setpoints...........................................................................................................................................................................................................85
3.2.2 Adjustment Range Restrictions............................................................................................................................................................................................85
3.3 Main Menu........................................................................................................................................................................................................................................................................87

Vertiv™ NetSure™ Control Unit (NCU) User Manual
vi
3.4 Controller Information Menu (accessed from the Main Menu).....................................................................................................................................88
3.5 Alarm Menu....................................................................................................................................................................................................................................................................89
3.6 Settings Menu..............................................................................................................................................................................................................................................................90
3.7 Start Wizard Sub-Menu (accessed from Settings Menu)...................................................................................................................................................96
3.8 Input Power Menu.....................................................................................................................................................................................................................................................97
3.9 Module Menu................................................................................................................................................................................................................................................................98
3.10 DC Menu ...........................................................................................................................................................................................................................................................................99
3.11 Battery Menu..............................................................................................................................................................................................................................................................100
4Description of Local Display Menus Programmable Parameters ...................................................................101
4.1 Settings Menu.............................................................................................................................................................................................................................................................101
4.1.1 Maintenance Sub-Menu..............................................................................................................................................................................................................101
4.1.2 Energy Saving Sub-Menu..........................................................................................................................................................................................................101
4.1.3Alarm Settings Sub-Menu........................................................................................................................................................................................................102
4.1.4 Rect Settings Sub-Menu ...........................................................................................................................................................................................................102
4.1.5 Batt Settings Sub-Menu.............................................................................................................................................................................................................103
4.1.6 LVD Settings Sub-Menu............................................................................................................................................................................................................105
4.1.7 AC Settings Sub-Menu................................................................................................................................................................................................................105
4.1.8 Sys Settings Sub-Menu..............................................................................................................................................................................................................106
4.1.9 Comm Settings Sub-Menu ......................................................................................................................................................................................................106
4.1.10 Other Settings Sub-Menu.........................................................................................................................................................................................................107
5Web Interface Screens .................................................................................................................................................110
5.1 Overview of Web Function ..............................................................................................................................................................................................................................110
5.2 Homepage......................................................................................................................................................................................................................................................................110
5.3 System Status Information Area................................................................................................................................................................................................................112
5.4 System Specifications Information Area............................................................................................................................................................................................112
5.5 Controller Specifications Information Area......................................................................................................................................................................................112
5.6 Site Information Area............................................................................................................................................................................................................................................112
5.7 Alarms Area...................................................................................................................................................................................................................................................................113
5.8 System Status Area................................................................................................................................................................................................................................................114
5.8.1 Power System Tab ...........................................................................................................................................................................................................................115
5.8.2 Energy Sources Status Tab....................................................................................................................................................................................................135
5.8.3 General Status Tab.........................................................................................................................................................................................................................136
5.8.4 Custom Input Status Tab...........................................................................................................................................................................................................137
5.9 Menu Navigation Area........................................................................................................................................................................................................................................138
5.9.1 Settings Menu......................................................................................................................................................................................................................................139
5.9.2 History Log Menu ............................................................................................................................................................................................................................160
5.9.3 System Inventory Menu .............................................................................................................................................................................................................170
5.9.4 Advanced Settings Menu...........................................................................................................................................................................................................171
6Accessing the Controller via a Network Management System (NMS) ........................................................228
6.1 General ............................................................................................................................................................................................................................................................................228
6.2 NMS Supported by SNMP Agent.............................................................................................................................................................................................................228
6.2.1 NMS Supported by SNMP v2................................................................................................................................................................................................228
6.2.2 NMS Supported by SNMP v3................................................................................................................................................................................................228
6.2.3 Parameter Setting in SNMP Manager..........................................................................................................................................................................229

Vertiv™ NetSure™ Control Unit (NCU) User Manual
vii
6.3 MIB Installation.........................................................................................................................................................................................................................................................230
6.3.1 Installation..............................................................................................................................................................................................................................................230
6.3.2 Contents of the Controller’s MIB.......................................................................................................................................................................................230
6.4 Accessing the Controller through an NMS....................................................................................................................................................................................230
6.4.1 Apply Administrative Privilege............................................................................................................................................................................................230
6.5 ESR Configure...........................................................................................................................................................................................................................................................230
7Accessing the NCU via TL1........................................................................................................................................237
7.1 Accessing the TL1 Port.....................................................................................................................................................................................................................................237
7.1.1 Port Connection.................................................................................................................................................................................................................................237
7.1.2 TL1 Port Connection Keep-Alive Feature..................................................................................................................................................................237
7.2 TL1 User Session.....................................................................................................................................................................................................................................................237
7.2.1 Establishing a Session..................................................................................................................................................................................................................237
7.2.2 TL1 Autonomous Messages...................................................................................................................................................................................................237
7.3TL1 Port Configuration......................................................................................................................................................................................................................................238
7.4 TL1 Commands, Autonomous Messages, and Error Codes Supported by the NCU.............................................................................. 238
7.4.1 Format Overview of Required TL1 Messages .......................................................................................................................................................238
7.4.2 Samples ....................................................................................................................................................................................................................................................240
7.4.3 Table of TL1 Commands Supported .............................................................................................................................................................................242
7.4.4 Expanded Description of TL1 Commands Supported (in alphabetical order)....................................................................... 243
7.4.5 TL1 Autonomous Messages Supported (in alphabetical order)..........................................................................................................251
7.4.6 List of Error Codes for TL1 Commands Supported (in alphabetical order)...............................................................................255
8Replacement Procedures........................................................................................................................................... 256
8.1 NCU Replacement.................................................................................................................................................................................................................................................256
9NCU Digital Input and Relay Output Connections .............................................................................................258
9.1 NCU Digital Input Connections.................................................................................................................................................................................................................258
9.2 NCU Relay Output Connections ..............................................................................................................................................................................................................258
9.3 IB2 (Controller Interface Board) and EIB (Controller Extended Interface Board) ..................................................................................... 258
10 Specifications................................................................................................................................................................ 260

Vertiv™ NetSure™ Control Unit (NCU) User Manual
viii
Admonishments Used in this Document
DANGER
! Warns of a hazard the reader will be exposed to that will likely result
in death or serious injury if not avoided. (ANSI, OSHA)
WARNING
! Warns of a potential hazard the reader may be exposed to that could
result in
death or serious injury if not avoided. This admonition is not used for situations that pose a
risk only to equipment, software, data, or service. (ANSI)
CAUTION
! Warns of a potential hazard the reader may be exposed to that could
result in minor or moderate injury if not avoided. (ANSI, OSHA) This admonition is not
used for situations that pose a risk only to equipment, data, or service, even if such use
appears to be permitted in some of the applicable standards. (OSHA)
ALERT
! Alerts the reader to an action that must be avoided in order to protect
equipment, software, data, or service. (ISO)
ALERT
! Alerts the reader to an action that must be performed in order to prevent
equipment damage, software corruption, data lo
ss, or service interruption. (ISO)
FIRE SAFETY
! Informs the reader of fire safety information, reminders, precautions,
or policies, or of the locations of fire
-fighting and fire-safety equipment. (ISO)
SAFETY
! Informs the reader of general safety information, reminders, precautions, or
policies not related to a particular source of hazard or to fire safety. (ISO, ANSI, OSHA)

Vertiv™ NetSure™ Control Unit (NCU) User Manual
ix
Important Safety Instructions
Safety Admonishments Definitions
Definitions of the safety admonishments used in this document are listed under “Admonishments Used in this Document” on page viii.
General Safety
DANGER! YOU MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures may expose you to hazards. These procedures should be performed by qualified
technicians familiar with the hazards associated with this type of equipment. These hazards may include shock, energy,
and/or burns. To avoid these hazards:
a) The tasks should be performed in the order indicated.
b) Remove watches, rings, and other metal objects.
c) Prior to contacting any uninsulated surface or termination, use a voltmeter to verify that no voltage or the expected
voltage is present. Check for voltage with both AC and DC voltmeters prior to making contact.
d) Wear eye protection.
e) Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for the work to be
performed.
Personal Protective Equipment (PPE)
DANGER! ARC FLASH AND SHOCK HAZARD.
Appropriate PPE and tools required when working on this equipment. An appropriate flash protection boundary analysis
should be done to determine the “hazard/risk” category, and to select proper PPE.
Only authorized and properly trained personnel should be allowed to install, inspect, operate, or maintain the equipment.
Do not work on LIVE parts. If required to work or operate live parts, obtain appropriate Energized Work Permits as required
by the local authority, per NFPA 70E “Standard for Electrical Safety in the Workplace”.
Handling Equipment Containing Static Sensitive Components
ALERT! Installation or removal of equipment containing static sensitive components requires careful handling. Before
handling any equipment containing static sensitive components, read and follow the instructions contained on the Static
Warning Page.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
x
Static Warning
This equipment contains static sensitive components. The warnings listed below must be observed to prevent damage to
these components. Disregarding any of these warnings may result in personal injury or damage to the equipment.
1. Strictly adhere to the procedures provided in this document.
2. Before touching any equipment containing static sensitive components, discharge all static electricity from yourself by
wearing a wrist strap grounded through a one megohm resistor. Some wrist straps have a built-in one megohm resistor;
no external resistor is necessary. Read and follow wrist strap manufacturer’s instructions outlining use of a specific wrist
strap.
3. Do not touch traces or components on equipment containing static sensitive components. Handle equipment
containing static sensitive components only by the edges that do not have connector pads.
4. After removing equipment containing static sensitive components, place the equipment only on static dissipative
surfaces such as conductive foam or ESD bag. Do not use ordinary Styrofoam or ordinary plastic.
5. Store and ship equipment containing static sensitive components only in static shielding containers.
6. If necessary to repair equipment containing static sensitive components, wear an appropriately grounded wrist strap,
work on a conductive surface, use a grounded soldering iron, and use grounded test equipment.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
1
1Introduction
1.1 Preface
These instructions describe the complete functionality of the Vertiv™ NetSure™ Control Unit (NCU). Some functionality is dependent
on hardware connected to the NCU. Your system may not utilize all the functionality described.
Refer also to the NCU Configuration Drawing (C-drawing) furnished with your system for a list of factory default settings.
1.2 Overview
The NCU performs the following functions:
•Rectifier Control, including an Energy Optimization Mode
•Solar Converter and Converter Control
•System Components Monitoring and System Alarms Generation (including recording alarms in logs)
•Operating Data Acquisition and Data Logs
•Battery Management
•Energy Management via Energy Optimization Mode
•Power Split Feature
•AC Generator Function
•Diesel Management Feature
•Hybrid Control Function (Supporting Generator, Solar and Wind Energy Input, and Optimization).
•Supervisory Module (SM Modules) Monitoring
•Maximum Current Limit Function
•Communications Function
•FIAMM SoNick (Sodium Nickel) Battery Interface
•Radius Server Feature
The NCU controls the system automatically via configured parameters.
A User can interface with the NCU locally using the local keypad and display or locally/remotely using the Web Interface.
The NCU can also be accessed via SNMP (v2 and v3) or TL1 (over Ethernet). A machine-to-machine HTTP interface is also available.
Figure 1.1 illustrates the various applications that can be used to interface with the NCU.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
2
Figure 1.1 Interfacing with the NCU
1.3 Function Descriptions
1.3.1 Rectifier, Solar Converter, and Converter Control
The NCU controls rectifiers, solar converters, and converters automatically.
NOTE! Solar Mode has to be enabled for NCU control of solar converters (see “Enabling Solar Mode” on page 38).
ALERT! The NCU can be equipped in a system that can either have +24V DC-DC converters installed or -58V DC-DC
converters installed. The system cannot have both types of converters installed at the same time.
1.3.2 System Components Monitoring and System Alarms Generation
The NCU monitors the components comprising the system (such as the rectifiers, solar converters, converters, and supervisory
modules) and generates alarms if a fault condition occurs. The NCU also maintains an alarm history log.
The available system alarms are programmed with an Alarm Severity Level. Each Alarm Severity Level has different visual/audible
alarm attributes. Available Alarm Severity Levels and their attributes are listed in Table 1.1.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
3
The available system alarms can also be mapped to alarm relays (located on controller interface boards) that can be wired to external
alarm circuits.
Table 1.1 Alarm Severity Levels
Alarm
Severity Levels
Red
LED
Yellow
LED
Audible
Alarm Buzzer
Critical Alarm (CR) ON -- ON
Major Alarm (MJ) ON -- ON
Minor Alarm (MN) OFF ON OFF
No Alarm (NA) OFF OFF OFF
•Alarm Status Setting: Indicates if the alarm is active or not active, and the severity level
if active. The available alarm status settings are as follows.
-Critical Alarm: The fault endangers the power systems continued function.
-Major Alarm: The fault reduces the power systems functionality.
-Minor Alarm: Special operating condition.
-No Alarm: The alarm is disabled and no alarm is given.
•The alarm indicator turns OFF if the fault(s) that triggered the alarm clears.
•The audible alarm can be silenced by pressing any key on the NCU local interface pad.
The audible alarm is also silenced if the fault(s) that triggered the alarm clears.
•An audible alarm cutoff feature can be programmed that silences the audible alarm after a
preset programmable time period. The audible alarm can also be disabled.
1.3.3 Operating Data Acquisition and Data Logs
The NCU acquires and analyses real time data from the system's components such as the rectifiers, converters, and supervisory
modules.
The NCU uses this data to process alarms and also records data in logs. The logs are viewed using the Web Interface and consists of
the following. Logs can be saved in the .html (Web page) or .txt (text) format.
Data History Log/Event Log/Alarm History Log: There is a maximum of 60,000 data points recorded between these logs.
•Alarm History Log: Records 4000 latest alarms. The Web Interface displays the latest 500 items.
•Battery Test Log: Up to ten (10) battery discharge tests can be recorded.
•Event Log: Records 4000 latest events. The Web Interface displays the latest 500 items.
•Data History Log: The Web Interface displays the latest 500 items, and you can upload a file with up to the latest 6,000
items in a single date range. Use multiple date ranges to upload more than 6,000 items.
•System Log: Records 3000 items in run log. The Web Interface displays the latest 500 items.
•Diesel Test Log: Records 500 latest diesel test results.
NOTE! For all logs except the Battery Test Log , once maximum number of log entries is reached, new entries overwrite the
oldest entries.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
4
1.3.4 Battery Management
The NCU provides the following battery management functions.
•Battery Charge Temperature Compensation
•Battery Equalize Charge
•Battery Charge Current Limit
•High and Low Battery Temperature Alarms
•Battery Thermal Runaway Management (BTRM) Feature (Reduces Voltage during a High Battery Temperature Condition)
•Battery Discharge Test
•Battery Test Logs (maximum ten [10] tests saved)
•Battery LVD (Low Voltage Disconnect)
•Battery Capacity Prediction
•Battery Block and Battery Midpoint Monitoring
•Thermal Runway Detection and Management
NOTE! Battery management functions are not available for NCU configurations that enable NCU capability to receive status
information sent from FIAMM SoNick (Sodium Nickel) batteries.
Battery Charge Temperature Compensation
The NCU can be programmed to automatically increase or decrease system output voltage to maintain battery float current as
battery temperature decreases or increases, respectively. Battery life can be extended when an optimum charge voltage to the
battery with respect to temperature is maintained. Temperature is monitored by a sensor mounted on the battery. See your power
system documentation for temperature sensor information. You can also set high and low compensation temperature alarms.
Functional Description (See Figure 1.2):
Battery charge temperature compensation adds a correction term, related to the temperature of the batteries, to the nominal value of
the system voltage. The degree of regulation (TempComp Coeff), expressed in mV/°C/battery string, can be set per battery
manufacturer recommendations.
To protect batteries and voltage-sensitive loads, compensation is automatically limited to a maximum of two volts (48V systems) or
one volt (24 volt systems) above or below the nominal output level (float setting). Temperature compensation can be set to clamp
lower than this by enabling the Temperature Compensation Clamp feature. When enabled, temperature compensation will clamp if
the battery temperature reaches either the Temp Comp Max Voltage setting or the Temp Comp Min Voltage setting.
Temperature compensation is automatically disabled if communication between the controller and all rectifiers is lost, a DC over or
under voltage alarm activates, a low voltage disconnection occurs, manual mode is entered, or the system enters the equalize or test
modes.
Refer to “Specifications” on page 260 for temperature probe and reading accuracy.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
5
Figure 1.2 Temperature Compensated Voltage Control
Battery Equalize Charge and Battery Charge Current Limit
The NCU can increase system output voltage for equalizing the charge on all battery cells of a conventional flooded cell battery, or for
recharging the battery following a commercial power failure.
The charging function can be initiated cyclically (scheduled), automatically, or manually.
Refer to the battery manufacturer's instructions for equalize charging instructions.
Functional Description (See Figure 1.3):
•Start of Charging: When the battery charge current exceeds a preset value for three (3) minutes or if the calculated battery
capacity has decreased to a preset value (after a commercial AC failure, for example), the charging function of the NCU is
activated. A charging signal is sent from the NCU to the rectifiers to increase the voltage up to the battery charging level
Vequalize.
•Battery Current Limitation: After a commercial AC failure or when some battery cells are permanently damaged, the
current to the batteries can be quite extensive. To avoid overheating or further damages to the battery, the NCU limits the
battery current to a preset level by limiting the charging voltage of the rectifiers. Should the battery current still exceed a
higher preset value, an alarm is issued. Battery charge current is limited to the value set in the controller, as long as battery
voltage is above 47 VDC.
•End of Charging: When the charging current drops below a preset value, a defined prolonged charging time is started
before the charging is stopped and the voltage of the rectifiers return to the float charging level (Vnom). For safety, there is an
equalized charging limit time that stops the charging after a preset time.
Figure 1.3 Voltage Characteristics on Commercial AC Failure and Automatic Equalize Charging
TempCompCoeff
setting (mV/°C).
V
nom
T
nom
T
V
nom
V
high
V
low
Upper voltage level where temperature compensation
clamps the voltage. Limited to the TEMP COMP MAX V
setting.
Nominal voltage (voltage at nominal temperature).
Lower voltage level where temperature compensation
clamps the voltage. Limited to the TEMP COMP MIN V
setting.
Nominal temperature (no temperature compensation is done at this temperature).
This is the Temp Comp setting.
1V Max (24V System)
2V Max (48V System)
1V Max (24V System)
2V Max (48V System)

Vertiv™ NetSure™ Control Unit (NCU) User Manual
6
High and Low Battery Temperature Alarms
The NCU can monitor battery temperature via a temperature sensor mounted on a battery cell. Values for high battery temperature
and low battery temperature alarms can then be programmed into the NCU.
Battery Thermal Runaway Management (BTRM) Feature
The Battery Thermal Runaway Management (BTRM) feature reduces voltage during a high battery temperature condition.
You can designate a temperature sensor as the BTRM sensor. The BTRM sensor has High 2 and High 1 BTRM temperature alarm
limits. If battery temperature exceeds the “BTRM Temp High 2” setting, system voltage is lowered to the BTRM voltage setting. This
feature can also be disabled.
Battery Discharge Test and Battery Test Logs
The NCU can perform battery discharge tests to check the condition of the battery(s). There are three (3) types of battery discharge
tests:
•Battery Test without Constant Current
•Battery Test with Constant Current
•Short Time Test (requires two battery shunts)
A User can manually start a battery discharge test or program the NCU to automatically start battery discharge tests at scheduled
intervals. Twelve (12) Constant Current Tests can be scheduled by the month-day-hour. A Short Time Test can be scheduled to be
performed every 1-365 days. During a battery discharge test, the NCU controls the rectifiers output to place the entire load or partial
load on the batteries. The NCU monitors the discharge of the battery and saves the results in a battery test log. The NCU stores ten
(10) battery discharge tests.
Functional Description:
For manual battery discharge tests as well as for scheduled battery discharge tests, the following parameters must be set: End Test
Voltage, End Test Time, and End Test Capacity. See Figure 1.4.
Figure 1.4 Battery Test Diagram
Battery Discharge Test Sequence:
•For a Constant Current Test, the output voltage of the rectifiers is reduced so that the batteries supply the preset Constant
Current Test Current to the load.
•If Constant Current is disabled, then the current being delivered by the batteries will be dependent on the load.
•For a Short Time Test, the output voltage of the rectifiers is reduced so that only the batteries power the load. If the batteries
fail, the rectifiers power the load.
•The battery test continues until one of the following occurs:
-The preset End Test Time, see Figure 1.4, expires. The battery has passed the test.
-The battery capacity drops below the preset End Test Capacity. The battery has passed the test.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
7
-The battery voltage drops below the preset End Test Voltage (Vend) (see Figure 1.4). The battery has not passed the
test and the test is interrupted. A bad battery alarm is activated.
-If a critical alarm occurs during the test or there’s not enough load, the battery test is aborted. In such cases a “Battery
Test Fail” alarm will be activated (indicating the test couldn’t be done). This alarm is different from the “Bad Battery”
alarm (meaning the test was completed but the battery didn’t pass it).
•A battery test alarm is active during a battery discharge test.
•If the battery has not passed the test, a bad battery alarm is activated.
•After the battery discharge test, the output voltage of the rectifiers increases so that the rectifiers supply the system and
charge the batteries.
NOTE! A procedure for performing a manual battery discharge test is provided on page 47.
Battery LVD (Low Voltage Disconnect)
To prevent serious damage to the batteries during a commercial AC power failure, the batteries can be disconnected by voltage or
time control.
The batteries are reconnected automatically when commercial AC power is restored and a predetermined DC voltage level is reached.
See “LVD Tab Programmable Parameter Descriptions” on page 151 for descriptions of programmable LVD parameters.
Battery Capacity Prediction
The NCU can predict battery capacity. When a battery is connected to the system at initial setup or increasing the number of
batteries, you need to update the Battery Ah rating. After doing this and making sure the battery is fully charged you need to reset
the battery capacity used percentage by performing the “Reset Battery Capacity” command to tell the NCU that the batteries are
100% charged. From this point forward the NCU will keep track of the battery current and time to predict the battery capacity used.
Battery Block and Battery Midpoint Monitoring
The NCU can monitor battery blocks (12 V blocks) or midpoint battery voltage of battery strings connected to the EIB (Controller
Extended Interface Board) assembly. An alarm is issued when either battery block voltage or battery midpoint voltage is abnormal.
Thermal Runaway Detection and Management
Functional Description:
The system uses several control mechanisms to avoid thermal runaway.
•During a short high rate discharge, the batteries will normally get hot. The NCU takes this into consideration. After
completion of the discharge duty, the batteries are recharged with a limited current to avoid heating the batteries any further.
•The temperature of the batteries can be monitored, and the NCU sets the charge voltage appropriately, as previously
described under “Battery Charge Temperature Compensation” on page 4.
•In addition to battery temperature compensation, if battery temperature rises above a set temperature limit, the system stops
battery charging completely by lowering the output voltage to the“BTRM Voltage” setting. This allows the batteries to cool
down. The system also provides alarm notification of this occurrence. Power supplied to customer equipment is not
interrupted. See “Setting Battery Thermal Runaway Management (BTRM) Feature” on page 40 for programming.
•The battery LVD circuits can be programmed to open (disconnect) if a high temperature event occurs (HTD-High
Temperature Disconnect). The contactor(s) open when battery temperature rises above a programmable value and close
again when battery temperature falls below another programmable value. See “LVD Tab Programmable Parameter
Descriptions” on page 151 for programming.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
8
1.3.5 Energy Management
Energy Management consists of an Energy Optimization Mode.
Energy Optimization Mode
The NCU provides an Energy Optimization Mode (ECO) function. Energy Optimization permits an installation to only operate
rectifiers as needed to maintain the load and keep batteries in a fully charged condition. As load increases, Energy Optimization turns
on additional rectifiers as needed to maintain the load. As load decreases, Energy Optimization places rectifiers in standby to
conserve energy usage. Rectifiers which are always operating to maintain any load requirements are cycled through the group of
rectifiers controlled by this feature to provide uniform operating times for each rectifier.
ALERT! The Energy Optimization Mode should NOT be used in systems that operate without batteries.
NOTE! If the battery is ever disconnected, disable Energy Optimization Mode until the battery is reconnected.
The following operating conditions apply:
1. The ECO mode is only enabled upon normal system operation. If any of the following alarms occurs, the system cannot enter
or will exit the ECO mode.
a) Current imbalance (only when imbalance current protection is enabled).
b) AC fail.
c) Any one rectifier over temp.
d) Any one rectifier AC fail.
e) Any one rectifier fault.
f) Any one rectifier over voltage.
g) Any one rectifier fan fault.
h) Any one rectifier no response.
i) Any one battery fuse open.
j) Any one LVD disconnect.
k) Battery is in charge or discharge, as defined below:
-Battery current > [battery rated capacity × 0.005], or battery current > 5A means battery in charge.
-Battery current < [battery rated capacity × -0.003], or battery current < -2A means battery in discharge.
l) Under voltage.
m) Any one rectifier in current limit mode.
2. The system load cannot exceed the system energy saving point (default value is 45%). Otherwise the system cannot enter or
will exit the ECO mode.
3. When the rectifier load exceeds its optimal operating point, the system will exit the ECO mode and the controller will
recalculate and then turn off any unnecessary rectifiers. After that, the system can enter the ECO mode again.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
9
4. If the system enters the ECO mode and then exits for five consecutive times within one hour, an abnormal alarm (ECO Cycle
Alarm) will be generated and the system can no longer enter the ECO mode until the ECO Cycle Alarm is cleared manually or
retires automatically after 24 hours.
1.3.6 Power Split Feature
The Power Split feature allows you to connect the power system controlled via the NCU to an existing DC power system instead of
extending or completely replacing the existing DC power system.
The power system controlled via the NCU functions as “System A” to share load (split output) with the existing system (“System B”)
that requires expansion. The NCU does not require communication with the “System B’s” controller.
The Power Split feature provides for the sharing of total load in a controlled manner between the paralleled power systems.
When Power Split is programmed, the NCU adjusts rectifier output voltage per load demands to ensure proper sharing between
“System A” and “System B”. See Figure 1.5.
Figure 1.5 Power Split Feature
1.3.7 AC Generator Function
This is a special feature to control an AC generator using the NCU controller by either a voltage threshold or a battery capacity
threshold. The control occurs from a User designated relay located on the IB2 or EIB board. When this generator relay is activated,
this means the generator should turn “On”. Criteria for the generator function is to start the generator when either the output voltage
(AC Generator Start Voltage setting) or battery capacity (AC Generator Start Capacity setting) decreases to the set point. Once this
occurs, an alarm called “Automatic AC Generator Run” is activated, the relay changes state, and the generator is told to start. The
generator runs for a period of time and is then turned off after the Auto Equalize feature of the controller finishes.

Vertiv™ NetSure™ Control Unit (NCU) User Manual
10
Auto Equalize looks for two (2) specific conditions for activation.
1. Has the recharge current (provided either by the rectifiers or solar converters) exceeded a User settable Equalize Start
Current value for three (3) minutes or
2. Has the battery capacity decreased to a User settable value.
If either of the above conditions are reached, Auto Equalize activates and the NCU controller tells the rectifiers and solar converters (if
present) to provide their respective output equalize voltages. Auto Equalize will deactivate once the battery recharge current reaches
the Equalize Stop current level and the Equalize Stop Delay has been satisfied. Once equalize has finished, the generator will also
shut off if it is running.
In addition to the automatic features above, this Generator Function will provide a way to manually run the generator when necessary.
Although not necessary for operation, the function will also have the capability for recognizing a digital input signal that can be used
to send feedback to the controller that the generator is running.
See “AC Generator Function:” starting on page 144.
1.3.8 Diesel Management Feature
The Diesel Management feature is available when an SM-AC supervisory module is connected to the NCU. The Diesel Management
feature consists of a Diesel Test. The Diesel Test can be performed at specific intervals or a User can manually start the Diesel Test.
The NCU records the test results.
1.3.9 Hybrid Control Function (Supporting Generator, Solar and Wind Energy Input, and
Optimization)
Hybrid Control is designed for use in new installations or as an upgrade of existing sites powered by a diesel generator(s) when grid
power is not available. The Hybrid control is also applicable to sites with highly unreliable or frequently unavailable grid power
connection. The primary power source is still considered to be the diesel generator(s). Since grid power is always given priority, the
primary power source is still considered to be the grid power.
NOTE! The Hybrid Control function requires a specific configuration. Hybrid Control menus will not normally be displayed
unless your NCU has been configured by Vertiv for this function. Contact Vertiv for a Hybrid Control configuration.
General
Hybrid Control allows the option of selecting one of the following: Fixed Daily Time based operation or Capacity Discharge based
operation.
Fixed Daily Time based operation is intended to be used with a combination of AC powered active cooling (air conditioners) and DC
powered cooling (heat exchangers, etc.). The cycle period is synchronized to the 24hrs day-night cycle. It makes optimum use of the
different temperature conditions during the day and the night in order to facilitate Hybrid fuel saving operation.
Capacity Discharge based operation is intended for sites utilizing only DC powered cooling (heat exchangers, etc.). The cycle period
is determined by User selectable depth of discharge (DOD) of the batteries per cycle, and associated recharge time. It provides
optimum Hybrid fuel saving operation.
Operation from Grid Power is performed with both Fixed Daily Time and Capacity Discharge modes of operation. Grid power is
always given priority when available.
As the two types of control are specific to the hardware configuration of the site, the Fixed Daily Time or Capacity Discharge is a User
selectable option on installation.