Vertiv NetSure A50B50 Guide

NetSure™ A50B50 DC Power Retrofit
Installation and User Instructions
Kit Specification Number: 588250400, A50IFRM
588250300, A50EFRM

Vertiv™ NetSure™ A50B50 DC Power Retrofit Installation and User Instructions
Vertiv™ NetSure™ A50B50 DC Power Retrofit Installation and User Instructions
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.

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TABLE OF CONTENTS
Admonishments Used in this Document......................................................................................................................... iv
Important Safety Instructions ............................................................................................................................................. v
Static Warning ....................................................................................................................................................................... viii
1Document Set...................................................................................................................................................................... 1
2Description........................................................................................................................................................................... 1
3Installation............................................................................................................................................................................ 1
3.1 Mounting................................................................................................................................................................................................................................................................................1
3.2 Electrical Connections .............................................................................................................................................................................................................................................3
3.2.1 Connecting an Optional SM-Temp Module to the NCU CAN Bus......................................................................................................... 11
3.2.2 Installing the Controller...................................................................................................................................................................................................................15
3.2.3 Installing the Rectifier......................................................................................................................................................................................................................19
3.2.4 Re-installing the Front Cover Panel(s)...........................................................................................................................................................................20
4Initially Starting, Configuring, and Checking System Operation......................................................................21
4.1 Initial Startup Preparation...................................................................................................................................................................................................................................21
4.2Initially Starting the System ..............................................................................................................................................................................................................................21
4.3 Checking System Status.....................................................................................................................................................................................................................................22
4.4 Checking System Operation............................................................................................................................................................................................................................22

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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 loss, 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)

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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 iv.
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.
Voltages
AC Input Voltages
DANGER! This system operates from AC input voltage capable of producing fatal electrical shock. AC input power must be
completely disconnected from the branch circuits wiring used to provide power to the system before any AC electrical
connections are made. Follow local lockout/tagout procedures to ensure upstream branch circuit breakers remain de-
energized during installation. DO NOT apply AC input power to the system until all electrical connections have been
completed and checked.
DC Output and Battery Voltages
DANGER! This system produces DC power and may have a battery source connected to it. Although the DC voltage is not
hazardously high, the rectifiers and/or battery can deliver large amounts of current. Exercise extreme caution not to
inadvertently contact or have any tool inadvertently contact an output terminal or battery terminal or exposed wire
connected to an output terminal or battery terminal. NEVER allow a metal object, such as a tool, to contact more than one
termination or battery terminal at a time, or to simultaneously contact a termination or battery terminal and a grounded
object. Even a momentary short circuit can cause sparking, explosion, and injury.
DANGER! Follow local lockout/tagout procedures to ensure DC branch circuit protection devices remain de-energized
during installation at loads, as required.

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Battery
Refer to the battery manufacturer documentation for specific battery safety instructions. The following are general guidelines.
WARNING! Correct polarity must be observed when connecting battery leads.
WARNING! Special safety precautions are required for procedures involving handling, installing, and servicing batteries.
Observe all battery safety precautions in this manual and in the battery instruction manual. These precautions should be
followed implicitly at all times.
WARNING! A battery can present a risk of electrical shock and high short circuit current. Servicing of batteries should be
performed or supervised only by properly trained and qualified personnel knowledgeable about batteries and the required
precautions.
The following precautions should be observed when working on batteries:
•Follow the recommended PPE requirements per the SDS for the battery to be used.
•Batteries are an energy source that can produce high amounts of electrical current.
•Remove watches, rings, and other metal objects.
•Eye protection should be worn to prevent injury from accidental electrical arcs.
•Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for the work to be
performed. Ensure that wrenches with more than one working end have only one end exposed.
•Do not lay tools or metal parts on top of batteries.
•Verify that no current will flow when the battery is connected or disconnected by opening battery disconnects (if
available) or adjusting the system to match battery voltage.
•Risk of explosion if battery is replaced with an incorrect type or if polarity is reversed. Recommended to replace
batteries with the same manufacturer and type, or equivalent.
•Dispose of used batteries according to the instructions provided with the batteries. Do not dispose of batteries in a fire.
They may explode.
•Batteries may generate explosive gases during normal operation. Systems containing batteries should never be installed
in an airtight room or space. Only install in a ventilated environment.
•Batteries may contain sulfuric acid. If battery acid enters your eye, immediately flush your eye with running cold water
for at least 15 minutes. Get medical attention immediately. If battery acid contacts skin or clothing, wash immediately
with soap and water.
•Do not open or mutilate batteries.
•ALWAYS FOLLOW THE BATTERY MANUFACTURER’S RECOMMENDATIONS AND SAFETY INSTRUCTIONS.
ALERT! Performing maintenance and/or troubleshooting procedures may interrupt power to the loads, if battery reserve is
not sufficient.

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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”.
Hazardous Voltage
DANGER! HAZARD OF ELECTRICAL SHOCK.
More than one disconnect may be required to de-energize the system before servicing.
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 under “Static Warning” on
page viii.
Maintenance and Replacement Procedures
CAUTION! When performing any step in the procedures that requires removal or installation of hardware, use caution to
ensure no hardware is dropped and left inside the unit; otherwise service interruption or equipment damage may occur.
NOTE! When performing any step in the procedures that requires removal of existing hardware, retain all hardware for use in
subsequent steps, unless otherwise directed.

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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.

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1Document Set
The following documents are provided with your system.
•System Application Guide: SAG588250400/SAG588250300
•NCU Controller Instructions: UM1M830BNA
•Rectifier Instructions: UM1R483500E
•Schematic Diagram: SD588250400/SD588250300
•Wiring Diagram: T588250400/T588250300
•Power Data Sheet, A50B50
Cabinet: PD588242400
•SM TEMP Temperature
Concentrator Instructions: UM547490 (when SM TEMP is ordered)
2Description
Vertiv™ NetSure™ A50B50 DC Power Retrofit is a power solution comprising one or more frames that allow new-generation NetSure
rectifiers to be installed in the -48V Modular Power Series rectifier shelves that house the older model A50B50 rectifiers. The new
rectifiers can operate with or without the original rectifiers in the same system and the same shelf.
The A50IFRM Intelligent Frame accommodates a Rectifier Module, a Controller Unit, a CAN Interface assembly, and IB2 assembly.
The A50EFRM Expansion Frame accommodates a Rectifier Module and a CAN Interface assembly. One Intelligent Frame is required
per power system. The Controller Unit may contain the standard configuration, or may contain an optional special application
configuration.
For more information on system accessories, see SAG588250400.
3Installation
3.1 Mounting
The A50IFRM Intelligent Frame and A50EFRM Expansion Frame are designed to mount inside A50B50-based rectifier shelves.
Ensure that all AC input and DC output connections to the shelf are intact. No changes or adjustments are required for these
connections when installing the A50B50 Retrofit Solution. All wirings and grounding should follow the current edition of the National
Electrical Code and applicable local codes. Follow the procedure below.
Procedure
1. Remove the front cover panel from the frame, as shown in Figure 3.1 Set aside hardware for later use.
2. Slide the first empty frame into an open slot in the rectifier shelf.

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Figure 3.1 Installing A50IFRM Intelligent Frame and A50EFRM Expansion Frame into the Existing Shelf
3. Using the hardware supplied, secure the frame to the shelf. Refer to Figure 3.2.
4. Do not install the front cover panel on the frame at this time.
5. Repeat the same steps for the rest of the frames.
Figure 3.2 Securing the Frame to the Shelf
Front Cover Panel
A50IFRM
Frame
A50EFRM
Frames
A50B50-based
Rectifier Shelf
To remove front cover panels,
remove (4) 8-32 x 1/2” screws
from each frame.
NCU
location
Rectifier
location
(4) No. 8
washers (4) 8-32 x 5/16
screws

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3.2 Electrical Connections
Wiring Considerations
The AC input, DC output, and system alarm connections on the frame mate with the existing connectors in the shelf. No adjustments
or alterations are required for these connections.
Making CAN Connections
CAN connections are made to allow expansion frames (A50EFRM) to connect to the main frame (A50IFRM) for rectifier control and
alarming. Follow the procedure below.
NOTE! If only one frame (A50IFRM) is used for application, install the furnished CAN bus termination plug (P/N 547678) to
terminate the bus. This terminator is inserted into the socket at the upper right side of the frame. Refer to Figure 3.3 for
details.
Single Shelf
1. To connect adjacent frames in one existing shelf, use the 6-in long P/N 548451 CAN cable for each connection. Refer to
Figure 3.3 for a sample configuration of (1) A50IFRM and (2) A50EFRMs.
Figure 3.3 CAN Connections in a Single Shelf
2. To terminate the bus, plug the furnished termination plug (P/N 547678) into the right-hand CAN port of the last frame.
P/N 547678
Terminator
P/N 548451
6” CAN cable
Single Shelf CAN Connection
A50IFRM A50EFRM A50EFRM
A50IFRM A50EFRM A50EFRM
DETAILS
SM-Temp
Module
or
(RJ-45)

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3. For CAN connections with only one A50IFRM and one A50EFRM, insert the termination plug into the right-hand CAN port of
the A50EFRM.
Alternatively, if the system is equipped with one or more SMTEMP modules, the fist SMTEMP module's CAN interface should
be connected to the right-hand CAN port of the last A50EFRM. The last SMTEMP module will provide the means to
terminate the CAN per the SMTEMP user instructions, UM547490.
Multiple Shelves
1. To connect frames installed in different shelves, use the 24-in long CAN cable (P/N 547520) to provide a longer wiring
distance. Refer to Figure 3.4 for a typical configuration of (1) A50IFRM and (8) A50EFRMs.
NOTE! Figure 3.4 shows one way to make CAN bus connections between retrofit frames in systems with multiple shelves.
You can use the supplied cables in any way that best fits your application. The only requirements are that all retrofit frames
in the system must be connected in series (in any order) and the termination plug must be installed in the last available port.
Alternatively, if the system is equipped with one or more SMTEMP modules, the fist SMTEMP module's CAN interface should
be connected to the right-hand CAN port of the last A50EFRM. The last SMTEMP module will provide the means to
terminate the CAN per the SMTEMP user instructions, UM547490.
2. Similar to single shelf configuration of terminating the connection, use P/N 547678 CAN terminator/jumper and plug into the
upper right CAT-5 socket of the last frame used.
3. When all CAN connections are made, the front covers can be mounted back on all frames.

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Figure 3.4 CAN Connections in Multiple Shelves
P/N 547520
24” CAN cable
Multiple Shelves CAN Connection
P/N 547678
Terminator
P/N 548451
6” CAN cable
P/N 548451
6” CAN cable
A50EFRM A50EFRM A50EFRM
A50EFRM A50EFRM A50EFRM
A50IFRM A50EFRM A50EFRM
P/N 547520
24” CAN cable
P/N 548451
6” CAN cable
SM-Temp
Module
or
RJ-45

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Making IB2 Board Connections
Digital inputs, relay outputs, and temperature probe(s) are connected to the IB2 Board. Refer to Figure 3.5 for connector locations,
and Table 3.1 and Table 3.2 for pin-out information.
If required to access these connection points, loosen the captive fastener on the front of the IB2 Board, and slide the assembly
partially out of the shelf. Recommended torque for the Digital Input and Relay Output terminal blocks is 5 in-lbs.
Connecting Digital Inputs
Connect up to six (6) digital inputs to the IB2 Board. (Inputs 7 and 8 are factory connected, as listed in Table 3.1.)
All user-defined digital inputs are set to alarm on a HIGH signal. Refer to the controller’s User Manual for instructions on how to set
these signals to be active LOW if desired.
An active HIGH signal means a voltage must be applied to generate an alarm. For example, if Digital Input No. 1 is used, connect -48V
RTN to (+) and -48V to (-) to generate an alarm.
An active LOW signal means no voltage will generate an alarm. For example, if Digital Input No. 1 is used, connect -48V RTN to (+)
and -48V to (-) for no alarm. Removing any of the signals will then generate an alarm.
The digital inputs can be configured to provide an alarm when the signal is applied (HIGH) or removed (LOW).
Connecting Relay Outputs
The IB2 Board provides five (5) programmable alarm relays with Form-C contacts. Refer to Table 3.2 for pin-out information. (Relays 6
through 8 are factory connected, as listed in Table 3.2.)
Refer to the notes in Figure 3.5 for relay operation.

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Figure 3.5 IB2 Board Connection
J1
SW1
J11
J12
Relay Output Term. Blocks * Digital Input Term. Blocks **
Temp Probe #2
Temp Probe #1
J9 J8 J7 J6 J5 J4 J3
J2 Factory-
connected
to Controller
Switch sections must be set to this position
to interface with the controller.
Relay No.
Relay No. 18 7 6 5 4 3 2
18 7 6 5 4 3 2 Input
No. (–)
Input
No. (+)
NO C NC
NO C NC
NO C NC
NO C NC
NO C NC
NO C NC
NO C NC
NO C NC
5 3 1
46 2
5 3 1
46 2
5 3 1
46 2
531
46 2
531
46 2
5 3 1
46 2
531
46 2
8 6 42
7 5 3 1
**
CAUTION: DO NOT disconnect any factory wiring when making connections.
Alarm Relays 1 through 5 are available for customer use. Alarm Relays 6 through 8 are used internally.
The relay assigned by the Controller to be the “Critical Summary” alarm or “Major Summary” alarm
(relay 1 by default) will operate in the “Fail Safe Mode”. Fail Safe Mode means the relay is de-energized during an alarm
condition, opening the contacts between the C and NO terminals, and closing the contacts between the C and NC terminals.
The remaining seven (7) alarm relays energize during an alarm condition, closing the contacts between the C and NO
terminals, and opening the contacts between the C and NC terminals.
WARNING: Observe proper polarity when making Digital Input connections.
Digital Inputs 1-6 can be programmed by the user.
Digital Input 7 is predefined as the external Fuse Alarm input. Customer supplied -48V at J5-1 activates the alarm.
Digital Input 8 is predefined as the ESTOP (Emergency Stop) input. Customer supplied RTN (+48V) at J5-4 activates ESTOP.
*
IB2 Customer
Interface Board
To access connections,
loosen this captive faster
and pull board part way out.

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Table 3.1 Digital Inputs
Programmable Digital
Input Pin No. Dedicated to...
1
J3-2 +
User Defined
J3-1 –
2
J3-4 +
User Defined
J3-3 –
3
J3-6 +
User Defined
J3-5 –
4
J4-2 +
User Defined
J4-1 –
5
J4-4 +
User Defined
J4-3 –
6
J4-6 +
User Defined
J4-5 –
7
J5-2 + External Fuse Alarm
(Pre-defined)
J5-1 –
8
J5-4* + Emergency Stop
(Pre-defined)
J5-3 –
-- J5-5
Not Used
-- J5-6
* When connecting to J5-4, do not remove the factory wiring connected to this
terminal.
NOTE! Refer to the controller configuration drawing supplied with the system for digital input assignments associated with
any custom configuration.

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Table 3.2 Relay Outputs
Programmable Relay
Output
NCU
IB2 Pin No.
Alarms Assigned to
this Relay
(Default)
Alarms Assigned to
this Relay
(Custom)
1 *
NO J6-5
Any Major Alarm
Any Critical AlarmCOM J6-3
NC J6-1
2
NO J6-6
Any Minor Alarm
Any Major AlarmCOM J6-4
NC J6-2
3
NO J7-5
AC FailureCOM J7-3
NC J7-1
4
NO J7-6
DC Over Voltage 1COM J7-4
NC J7-2
5
NO J8-5
DC Under Voltage 1COM J8-3
NC J8-1
6
NO J8-6
Rectifier Fail Minor (Internal Wiring) Not AvailableCOM J8-4
NC J8-2
7
NO J9-5
Rectifier Fail Major (Internal Wiring) Not AvailableCOM J9-3
NC J9-1
8
NO J9-6
Rectifier Fan Failure (Internal Wiring) Not AvailableCOM J9-4
NC J9-2
NOTE! Refer to the notes in Figure 3.5 for relay operation.
NOTE! Refer to the controller configuration drawing supplied with the system for relay
assignments associated with any custom configuration.

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Installing and Connecting Optional Temperature Probe(s)
Up to two (2) temperature probes can be connected to the Customer Interface (IB2) Board. See Figure 3.5 for connector location.
NOTE! Each temperature probe consists of two pieces that plug together to make a complete probe. See SAG588250400
for part numbers and descriptions.
Either or both probes can be programmed to monitor ambient temperature or battery temperature.
A temperature probe set as a battery probe can also be designated to be used for the battery charge temperature compensation
feature. If the system is equipped with the NCU Controller, the battery charge temperature compensation feature can be
programmed to use one probe or the average or highest value of all probes programmed to monitor battery temperature. (The
battery charge temperature compensation feature allows the controller to automatically increase or decrease the output voltage of
the system 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.)
If the system is equipped with the NCU Controller, a temperature probe set as a battery probe can also be used for controlling against
battery thermal runaway (BTRM feature).
The temperature sensor end of the probe contains a tab with a 5/16” diameter clearance hole for mounting.
A temperature probe programmed to monitor battery temperature should be mounted on the negative post of a battery block or cell
to sense battery temperature. A temperature probe used for battery charge temperature compensation or BTRM (Battery Thermal
Runaway Management) should also be mounted on the negative post of a battery block or cell. A temperature probe programmed to
monitor ambient temperature should be mounted in a convenient location, away from direct sources of heat or cold.
Refer to “Initially Starting, Configuring, and Checking System Operation” beginning on page 21 for procedures for configuring the
probes. For additional information, refer also to the separate Controller User Manual supplied with your retrofit.

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3.2.1 Connecting an Optional SM-Temp Module to the NCU CAN Bus
An SM-Temp Module can be connected to the NCU’s CAN Port located on the last retrofit frame. Refer to Figure 3.6 for port location
and connections details. Refer to Table 3.3 for port pin-outs. Refer also to the SM-Temp Module Instructions (UM547490).
Procedure
1. Remove the CAN termination plug from the CAN Port connector located on the last retrofit frame (see Figure 3.6 for
location). Connect the SM Temp Module CAN bus to this CAN Port connector. Refer to Table 3.3 for pin-outs. Ensure the
last SM-Temp Module (or if only one) has a CAN termination strap as shown in the SM-Temp Module Instructions
(UM547490).
2. Reboot the Controller
Local Menu Navigation: At the Main Screen, press ENT and ESC at the same time to reset the NCU Controller.
Web Menu Navigation: Go to Advance Settings Menu / SW Maintenance Tab / Reboot Controller button.
Table 3.3 CAN Port Connections
NCU CAN Port (RJ-45)
on CAN Interface Board SM-Temp Module
CAN Port
Pin Number
J3 Pin Number Function
J3-1 CAN L TB1-5 (CAN L)
J3-2 CAN H TB1-3 (CAN H)
J3-3 -- --
J3-4 -- --
J3-5 -- --
J3-6 -- --
J3-7 -- --
J3-8 -- --

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Figure 3.6 Connecting an Optional SM-Temp Module
Connecting the SM-TEMP Module’s CAN Terminals to the NCU CAN Bus
Note: Cable P/N 562868 is ordered
separately. A standard CAT5 cable
can be used provided the
terminations are aligned correctly.
J3 Pin 1 on CAN interface board is
connected to CAN-L input pin on
SM-TEMP. J3 Pin 2 on CAN
interface board is connected to
CAN-H input pin on SM-TEMP.
RJ-45
ANALOG CAN
Orange
TB1
White-Orange
Cable P/N 562868
Cable P/N 562868
White-Orange: CAN L Terminal.
Orange: CAN H Terminal.
SM-TEMP Module
J3
(RJ-45)
CAN Interface Board
A50IFRM A50EFRM A50EFRM
Last Retrofit Frame in
NCU CAN Bus (see a
previous illustration for
multiple shelf
arrangement)
CAN Port (RJ-45) Located
on CAN Interface Board