Vertiv 582127200 User manual

NetSure™ 7200 Series
-48 VDC Power System
User Manual
Specification Number: 582127200
Model Number: 7200

Vertiv™ NetSure™ 7200 Series -48 VDC Power System User Manual
Vertiv™ NetSure™ 7200 Series -48 VDC Power System 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™ 7200 Series -48 VDC Power System User Manual
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TABLE OF CONTENTS
Admonishments Used in this Document.............................................................................................................................iv
Important Safety Instructions..................................................................................................................................................v
1Customer Documentation Package..................................................................................................................................1
2System Description ................................................................................................................................................................1
3Operating Procedures..........................................................................................................................................................2
3.1 Controller and Rectifiers.........................................................................................................................................................................................................................................2
3.2 Front Panel Touch Screen PC ..........................................................................................................................................................................................................................3
3.3 Disabling the Audible Alarm Feature on a Secondary Control Module in a Secondary Power Bay................................................3
3.4 ESTOP Function.............................................................................................................................................................................................................................................................3
3.5 NCU Battery Charge Current Limit Feature ........................................................................................................................................................................................4
3.6 Local Controls and Indicators ...........................................................................................................................................................................................................................4
3.6.1 Controller and Rectifiers..................................................................................................................................................................................................................4
4Maintenance.............................................................................................................................................................................8
4.1 Important Safety Instructions............................................................................................................................................................................................................................8
4.2 System Maintenance Procedures..................................................................................................................................................................................................................8
4.3 Adding a Rectifier Module to a Power Bay............................................................................................................................................................................................8
4.4 Adding a Secondary Power Bay in the Field........................................................................................................................................................................................8
4.5 Adding a Distribution Bay in the Field.......................................................................................................................................................................................................9
5Troubleshooting and Repair ............................................................................................................................................10
5.1 Important Safety Instructions.........................................................................................................................................................................................................................10
5.2 Contact Information.................................................................................................................................................................................................................................................10
5.3 Controller and Rectifiers......................................................................................................................................................................................................................................10
5.4 NCU Controller Configuration........................................................................................................................................................................................................................10
5.5 Front Panel Touch Screen PC Calibration..........................................................................................................................................................................................10
5.6 System Troubleshooting Information ......................................................................................................................................................................................................12
5.7 Replacement Information...................................................................................................................................................................................................................................14
5.8 Replacement Procedures...................................................................................................................................................................................................................................14
5.8.1 Replacing a Rectifier Module....................................................................................................................................................................................................14
5.8.2 Replacing the NCU Controller or a Secondary Control Module..............................................................................................................14
5.8.3 Replacing a Distribution Device.............................................................................................................................................................................................14
5.8.4 Circuit Card Replacement Procedures............................................................................................................................................................................23

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iv
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.
Safety and Regulatory Statements
Refer to Section 4154 (provided with your customer documentation) for Safety and Regulatory Statements.
Déclarations de Sécurité et de Réglementation
Reportez-vous à la Section 4154 (fourni avec les documents de votre client) pour les déclarations de sécurité et de réglementation.

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Vertiv™ NetSure™ 7200 Series -48 VDC Power System User Manual
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1Customer Documentation Package
This document (UM582127200) provides User Instructions for Vertiv™ NetSure™ -48 VDC Power System Model 7200, Spec. No.
582127200.
The complete Customer Documentation Package consists of…
Power System Installation Manual
•Power System Installation Instructions: IM582127200
NCU Controller User Manual
•NCU Controller User Instructions: UM1M830BNA
USB Drive with All Customer Documentation
•Power System Installation Instructions: IM582127200
•Power System User Instructions: UM582127200
•Power System “System Application Guide”: SAG582127200
•NCU Controller User Instructions: UM1M830BNA
•Rectifier Instructions: UM1R483500e
•Engineering Drawings
•Also provided on the USB drive is a controller configuration drawing and the controller configuration files loaded into the
controller as shipped.
2System Description
-48 VDC @ up to 12000 Amperes Power System
The Vertiv™ NetSure™ 7200 DC Power System is an integrated power system containing rectifiers, intelligent control, metering,
monitoring, and distribution.
This power system is designed to power a load while charging a positive grounded battery. The power system is designed for
operation with the positive output grounded.
This system consists of the following components.
Power Bay
The system consists of one (1) primary power bay and up to two (2) additional secondary power bays.
The system can be expanded right or left.
Each power bay can be equipped with up to sixty (60) rectifier modules. The power bay can be ordered factory configured for various
AC input options (refer to SAG582127200).
The primary power bay contains a front panel touch screen PC connected to the NCU controller. The primary power bay also
includes an NCU interface board (IB2) which provides digital inputs, temperature inputs, and relay outputs for internal and external
monitoring and alarms. An NCU extended interface board (EIB) is also provided for additional inputs/outputs connections. Also
furnished is the IB4 board which provides a second Ethernet port. The Ethernet port located on the NCU Controller’s front panel is
used to connect the front panel touch screen PC directly to the NCU. The Ethernet port located on the IB4 board can be used to
connect the NCU to your Local Area Network (LAN) for remote access. An indicator is visible from the outside of the primary power

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bay (at the top) which illuminates if a critical or major alarm condition occurs. An SM-DU module is mounted in the primary power
bay for connection of the internal load shunts provided in each power bay. The SM-DU also provides an additional external shunt
monitoring input.
Each secondary power bay contains a secondary control module.
Rectifier Modules:
The system contains rectifier modules, which provide load power, battery float current, and battery recharge current during normal
operating conditions. Refer to the Rectifier Instructions (UM1R483500e) for more information.
NCU Controller:
The controller provides power system control, rectifier control (including a charge control function), metering functions, monitoring
functions, and local/remote alarm functions. The controller also supports rectifier temperature compensation if the system is
equipped with a temperature probe(s). Temperature probe(s) may also be designated to monitor ambient temperature and/or
battery temperature. The controller also provides data acquisition, system alarm management, and advanced battery and energy
management. The controller contains a color LCD display and keypad for local access. The controller provides an Ethernet port and
comes with comprehensive webpages for remote access. The controller has SNMP v3 capability for remote system management.
The controller supports software upgrade via its USB port. Refer to the NCU Controller Instructions (UM1M830BNA) for more
information.
NOTE! In this system, the NCU Ethernet port is connected to a front panel touch screen PC for local access to the NCU
webpages. An IB4 (second Ethernet port board) is also furnished which provides a connection point for a remote monitoring
Ethernet connection.
Distribution Bay
The system can consist of up to five (5) distribution bays.
The system can be expanded right or left and may be top or bottom fed.
Each distribution bay contains an SM-DU+ for connection of the internal load shunts and FA signals provided in the various
distribution panels, and for interface to the NCU Controller. An optional SM-DU+ is available for connection of additional load shunts
and FA signals. A kit is available which allows the optional SM-DU+ to be mounted external to the power system.
An indicator is visible from the outside of the distribution bay (at the top) which illuminates if a fuse or circuit breaker in the bay
opens.
Each distribution bay provides 39 RU of vertical rack space for mounting a variety of distribution panels. Distribution panel options
include a TPL fuse panel, a TPH fuse panel, a bullet nose type panel that accepts bullet nose circuit breakers and TPS/TLS
fuseholders, and two types of GJ/218 circuit breaker panels.
Transition Bay to Vertiv™ NetSure™ 802 (582140000 List 1 or List 11)
Allows the 582127200 distribution bay’s -48 VDC internal top mount bus to be connected to the internal rear mount -48 VDC bus on a
Spec. No. 582140000 List 1 or List 11.
3Operating Procedures
3.1 Controller and Rectifiers
For operation instructions on these units, refer to the following documents.
•NCU Controller Instructions (UM1M830BNA)
•Rectifier Instructions (UM1R483500e)

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3.2 Front Panel Touch Screen PC
The NCU Controller’s Ethernet port is factory connected to a front panel touch screen PC. This allows local access to the NCU
Webpages via the front panel touch screen PC’s internet browser.
Enter the address 192.168.100.100 in the Web browser of the front panel touch screen PC to access the NCU’s Web Interface.
Refer also to the NCU Controller Instructions (UM1M830BNA) for webpage interface information.
Refer to “Front Panel Touch Screen PC Calibration” on page 10 for a calibration procedure.
3.3 Disabling the Audible Alarm Feature on a Secondary Control Module in a
Secondary Power Bay
Procedure (Secondary Control Module Local Display and Keypad)
1. From the Main Menu, select the “Settings Icon”.
2. If a password screen opens, a password must be entered to allow the User to make adjustments. If a password was
previously entered and has not yet timed out, skip this step and proceed to step 3. Otherwise, to enter a password, use the
UP and DOWN keys to move the cursor to the Enter Password field. Press ENT. Use the UP and DOWN keys to choose a
character. Press ENT to accept and move to the next character. Continue this process until all characters are entered.
Press ENT again to accept the password. The default password is 640275.
3. Navigate to the “Other Settings” menu.
4. Navigate to “Rect Expansion” and set this parameter to “inactive”.
5. Navigate to the “Alarm Settings” menu.
6. Navigate to “Audible Alarm” and set this parameter to "off”.
7. Navigate to the “Other Settings” menu.
8. Navigate to “Rect Expansion” and set this parameter to “secondary”.
9. After an automatic reboot, navigate to Settings Menu / Other Settings / Address and set this parameter to 201 for the 1st
secondary bay and 202 for the 2nd secondary bay.
Procedure (NCU Webpages)
1. DO NOT USE THE WEBPAGES.
ALERT! DO NOT set a controller in a secondary power bay to Secondary from the Web Interface. You will not be able to log
into the controller after it automatically reboots into secondary mode. Controllers to be designated as secondary controllers
need to be set via the NCU’s local keypad and display.
3.4 ESTOP Function
If an ESTOP switch is wired to the IB2-1 Controller Interface Board, customer-furnished system ground applied to terminal DI8+
activates the ESTOP function. The ESTOP function shuts down and locks out the rectifiers. The controller will remain operational
and the loads will be sustained by the battery voltage, if battery is connected.
When the ESTOP signal is removed, rectifiers will remain off. The rectifiers will restart when the input power is removed and restored
after 30 seconds or more (until the LEDs on the modules extinguish).

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NOTE! If a customer-furnished method to disconnect the input power to the system is not provided, the rectifiers will stay
locked OFF until the input power is recycled. If the ESTOP signal is removed without recycling the input power, the rectifiers
will remain off and have a local alarm visible on the module. The ESTOP alarm from the controller will extinguish. The
controller will not issue an alarm for this condition.
3.5 NCU Battery Charge Current Limit Feature
Functionality: After a failure of the input source (commercial AC) 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 can be programmed to limit
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.
In this system, the NCU Battery Charge Current Limit feature is set to be disabled. Refer to the NCU Controller Instructions
(UM1M830BNA) to enable and program this feature, if desired. If enabled, battery charge current is limited to the value set in the
NCU Controller, as long as battery voltage is above 47 VDC.
3.6 Local Controls and Indicators
3.6.1 Controller and Rectifiers
Refer to the controller and rectifier instructions for descriptions of the local controls and indicators located on these units.
•NCU Controller Instructions (UM1M830BNA)
•Rectifier Instructions (UM1R483500e)
Primary Power Bay “System Alarm” Indicator
An indicator is visible from the outside of the primary power bay (at the top) which illuminates if a major or critical alarm condition
occurs.
Distribution Bay “Fuse / Circuit Breaker Alarm” Indicator
An indicator is visible from the outside of each distribution bay (at the top) which illuminates if a fuse or circuit breaker inside the
distribution bay opens.
IB2 (NCU Interface Board) and EIB (NCU Extended Interface Board) Indicator
The IB2 and EIB board has a green LED indicator which is lit in normal operation and flashes when the IB2 or EIB board is
communicating with the controller. Refer to Figure 3.1 for IB2 and EIB locations.
SM-DU and SM-DU+ Modules
An SM-DU is installed in the primary power bay for monitoring of the internal load shunts located in each power bay. An SM-DU+ is
installed in each distribution bay for distribution panel shunt and FA monitoring. A second SM-DU+ can be installed in each
distribution bay (up to a total of eight SM-DU+ modules) for additional distribution shunt and FA monitoring. Refer to Figure 3.1 for
SM DU and SM-DU+ locations. Refer to the next sections for indicators descriptions.

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Figure 3.1 IB2, EIB, SM-DU, and SM-DU+ Locations
Components removed in
illustrations for clarity only.
NCU Interface
Board (IB2)
SM-DU
(for monitoring
of load shunts
located in each
power bay)
Primary Power Bay Front
(Front Door Not Shown)
Distribution
Bay
Primary
Power
Bay
Front
Components
mounted on
side panel.
Components
mounted on
side panel.
IB4 Board
(for Network
connection for
remote access)
CAN Bus
Terminal
Block
-48V
Terminal Block
NCU Extended
Interface Board
(EIB)
Power
Supply
Components
mounted on
side panel.
Front
SM-DU+
(for monitoring
of shunts and FA
signals located
in the various
distribution
panels)
Optional
SM-DU+
(for additional
monitoring of
shunts and FA
signals located
in the various
distribution
panels)
-48V
Terminal
Block
CAN Bus
Terminal
Block -48V
Terminal
Block
CAN Bus
Terminal
Block

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SM-DU Module Indicators
The SM-DU monitors the load shunts in the power bays and reports this data to the controller. The SM-DU also provides an
additional external shunt monitoring input.
There are three (3) status and alarm indicators located on the SM-DU. The functions of these indicators are as shown in Table 3.1.
Refer to Figure 3.2 for location.
Table 3.1 SM-DU Indicators
Indicator Normal State Fault State Fault Cause
Alarm
(Red) Off On A critical or major alarm.
Alarm
(Yellow) Off On A minor alarm.
Operation
(Green) On
Off SM-DU is non-operational.
Flashing
A 1/3Hz flashing indicates the SM-DU is being
identified by the Controller.
A 1Hz flashing indicates a communication failure.
Figure 3.2 SM-DU Circuit Card
S1 S2 S3
JP1
JP2
JP3
J5
J4 J4A
J3J1
J2 Red Indicator
Yellow Indicator
Green Indicator
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Power CAN RS485 RS485
RS232
ON
OFF
Note: Refer to
IM582127200 for
switch settings.

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SM-DU+ Module Indicators
The SM-DU+ monitors the shunts and FA signals located on the individual distribution panels in the distribution bays and reports this
data to the controller.
There is one (1) status and alarm indicator located on the SM-DU+. The function of this indicator is as shown in Table 3.2. Refer to
Figure 3.3 for location.
Table 3.2 SM-DU+ Indicators
Indicator Normal State Fault State Fault Cause
Operation
(Green) On
Off SM-DU+ is non-operational.
Flashing
A 1/3Hz flashing indicates the SM-DU+ is being
identified by the Controller.
A 1Hz flashing indicates a communication failure.
Figure 3.3 SM-DU+ Circuit Card
Power CAN RS485 RS485
RS232
SW1 SW2
J1 J7
Shunt Shunt
J8 J6
Alarm
J3 J4 J4A
J5
ON
OFF
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Green Indicator
Note: Refer to
IM582127200 for
switch settings.

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4Maintenance
4.1 Important Safety Instructions
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
4.2 System Maintenance Procedures
It is recommended to perform the maintenance procedures listed in Table 4.3 every 6 months to ensure continual system operation.
Table 4.3 Maintenance Procedures to be Performed at 6-Month Intervals
PROCEDURE REFERENCED IN
Check ventilation openings for obstructions such as
dust, papers, manuals, etc. --
Inspect and tighten all installer's connections.
IM582127200,
Making Electrical Connections
section.
4.3 Adding a Rectifier Module to a Power Bay
For rectifier module installation instructions, refer to Rectifier Instructions (UM1R483500e).
To increase system current capacity, a rectifier module can easily be added to an open rectifier module mounting position in a power
bay.
It is recommended that the current limit point be checked whenever a rectifier module is added to or removed from a power bay.
Refer to “Checking the NCU Current Limit Point after Adding or Removing a Rectifier Module” on page 12.
The rectifier module being added is assigned by the NCU the lowest available identification number. If desired, you can change the
identification number. See “Configuring the NCU Identification of Rectifiers” in the separate Power System Installation Instructions
(IM582127200).
4.4 Adding a Secondary Power Bay in the Field
Installing the Secondary Power Bay
Refer to the Power System Installation Instructions (IM582127200) for procedures detailing mounting and wiring of a secondary power
bay.
Setting the System to Work with Secondary Power Bays
NOTE! Refer to the NCU Controller Instructions (UM1M830BNA) for further information to perform the following procedures.
To use secondary power bays with a primary power bay you must perform the following procedures. New configuration files must be
loaded into the controllers and the controllers must be programmed for primary/secondary bay operation. Perform the following
procedures exactly in the order listed.
Load a Secondary Power Bay’s Configuration Package Procedure
After a secondary power bay has been wired up properly according to the installation manual, load the secondary power bay’s
configuration package (located on a USB memory device supplied with the secondary power bay) into the secondary power bay’s
“secondary control module”. This is configuration P/N 563198.

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1. Connect the USB memory device (with P/N 563198 configuration) supplied with the secondary power bay to the USB port on
the front of the bay’s controller.
2. On the secondary power bay’s controller, navigate to “Main Menu / Settings Icon / Sys Settings / Update App”. Select yes.
Once Yes is selected and confirmed, the configuration file located on the memory device located in the controller's USB port
is loaded into the controller.
3. The controller enters an initialization routine, which takes a few minutes. The routine is complete and the controller is
operational when normal system voltage is displayed on the screen.
4. Remove the memory device.
Set a Secondary Power Bay’s Controller to “Secondary” and Assign an Address Procedure
1. On the secondary power bay’s controller, navigate to “Main Menu / Settings Icon / Other Settings / Rect Expansion”. Set to
“secondary”.
NOTE! When secondary is selected, the controller will start auto configure. This process may take more than three (3)
minutes.
2. An “Address” menu item appears after the controller automatically reboots. Set the address to 201, 202, or 203. Note that
each secondary controller (bay) must be set to a different address. Set this parameter to 201 for the 1st secondary power
bay and 202 for the 2nd secondary power bay.
Additional Secondary Power Bays Procedure
1. Repeat the above two procedures if there are additional secondary power bays.
Load the Primary Power Bay’s Configuration Package Procedure
After the above steps are performed, load the primary power bay’s configuration package (located on a USB memory device supplied
with the secondary power bay) into the primary power bay’s “primary control module”. This is configuration P/N 562997.
1. Connect the USB memory device (with P/N 562997 configuration) supplied with the secondary power bay to the USB port on
the front of the primary power bay’s controller.
2. Navigate to “Main Menu / Settings Icon / Sys Settings / Update App”. Select yes. Once Yes is selected and confirmed, the
configuration file located on the memory device located in the controller's USB port is loaded into the controller.
3. The controller enters an initialization routine, which takes a few minutes. The routine is complete and the controller is
operational when normal system voltage is displayed on the screen.
4. Remove the memory device.
Set the Primary Power Bay’s Controller to “Primary” Procedure
1. On the primary power bay’s controller, navigate to “Main Menu / Settings Icon / Other Settings / Rect Expansion”. Set to
“primary”.
NOTE! When primary is selected, the NCU will start auto configure. This process may take more than three (3) minutes.
2. The controller automatically reboots.
4.5 Adding a Distribution Bay in the Field
Refer to the Power System Installation Instructions (IM582127200) for procedures detailing mounting and wiring of a distribution bay.

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NCU Programming
After the bay has been wired up properly and the SM-DU+ DIP switches have been set according to the separate Power System
Installation Instructions (IM582127200), individually program the NCU for the shunt sizes and alarm thresholds for each distribution
element that is to be monitored by the SM DU+. These settings can be done through the web pages shown on the touch screen
panel on the primary power bay. Refer to the NCU Controller Instructions (UM1M830BNA) for programming information.
5Troubleshooting and Repair
5.1 Important Safety Instructions
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
5.2 Contact Information
Refer to Section 4154 (provided with your customer documentation) for support contact information.
5.3 Controller and Rectifiers
For troubleshooting and repair instructions on these units, refer to the following documents.
•NCU Controller Instructions (UM1M830BNA)
•Rectifier Instructions (UM1R483500e)
5.4 NCU Controller Configuration
If any NCU Controller configuration settings were changed, refer to the NCU Instructions (UM1M830BNA) and save a copy of the
configuration. The saved configuration can be used to restore the NCU Controller settings, if required, at a later date.
NOTE! Provided on a USB drive furnished with the system is an NCU configuration drawing (C drawing) and the NCU
configuration files loaded into the NCU as shipped.
5.5 Front Panel Touch Screen PC Calibration
To calibrate the touch screen of the front panel PC, perform the following procedure.
Procedure
1. Click on the Window’s “Start” button.
2. Locate the “eGalaxTouch” folder.
3. Open “Configure Utility”.

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4. You will now see the USB controller box as shown below.
5. Click on the “Tools” tab.
6. Click on the “4 Point Calibration” button.
7. The calibration program starts. Place you finger (and hold) on each cross that appears in each corner of the screen.

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5.6 System Troubleshooting Information
This system is designed for ease in troubleshooting and repair. The various indicators as described in “Local Controls and Indicators”
on page 4 and in the controller and rectifier instructions are designed to isolate failure to a specific element. Once the faulty element
has been identified, refer to “Replacement Information” on page 14 and “Replacement Procedures” on page 14.
Troubleshooting Alarm Conditions on the NCU Controller
The NCU Controller displays alarm conditions as listed in the “Resolving Alarms” section of the NCU Instructions (UM1M830BNA).
Programmable external alarm relays are also available. Refer to the System Installation Instructions (IM582127200) and the
configuration drawing (C-drawing) supplied with your power system documentation for your alarm relay configurations.
The NCU’s
Active Alarm and Alarm History submenus allow the User to view alarm details. Refer to the NCU Instructions
(UM1M830BNA) to access these menus.
Checking the NCU Current Limit Point after Adding or Removing a Rectifier Module
If a rectifier module is added to the power system, the system current limit point will automatically increase by the percentage each
existing rectifier was set to provide prior to the addition.
If a rectifier module is removed from the system (and the Rect Comm Fail alarm is reset), the current limit point will remain unchanged
unless the capacity of the remaining rectifiers is not sufficient to maintain the present current limit point. If that happens, the current
limit point will automatically increase to the maximum (121% of the remaining rectifiers).
It is recommended that the current limit point be checked whenever a rectifier module is added to or removed from the power system.
Procedure (NCU Webpages)
1. Using the front panel touch screen PC, log into the NCU webpages.
2. Go to Settings Menu / Rectifiers Tab / Current Limit.
3. Enable the “Current Limit” parameter, if necessary.
4. Check the “Current Limit Point” setting and change if necessary.
Procedure (NCU Local Display and Keypad)
1. Go to Main Menu / Settings Icon / Rect Settings / Current Limit.
NOTE! If a password screen opens, a password must be entered to allow the User to make adjustments. To enter a
password, use the UP and DOWN keys to move the cursor to the Enter Password field. Press ENT. Use the UP and DOWN
keys to choose a character. Press ENT to accept and move to the next character. Continue this process until all characters
are entered. Press ENT again to accept the password. The default password is 640275.
2. Enable the “Current Limit” parameter, if necessary.
3. Check the “Current Limit Point” setting and change if necessary.
Clearing a Rectifier Communications Fail Alarm after Removing a Rectifier
If a rectifier module is removed from the system, a rectifier communications failure alarm is generated. If the rectifier module will not
be replaced, the alarm should be cleared as described in the following procedure.
Procedure (NCU Webpages)
1. Using the front panel touch screen PC, log into the NCU webpages.
2. Go to Settings Menu / Rectifiers Tab / Clear Rectifier Comm Fail Alarm.
3. Select “Yes” to clear the alarm.

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4. Go to Settings Menu / Rectifiers Tab / G1 or G2 Clear Rectifier Comm Fail Alarm.
NOTE! G1 is for the 1st secondary bay rectifier comm fail, and G2 is for the 2nd secondary bay rectifier comm fail.
5. Select “Yes” to clear the alarm.
Procedure (NCU Local Display and Keypad)
1. Go to Main Menu / Settings Icon / Alarm Settings / ClrRectCommFail.
NOTE! If a password screen opens, a password must be entered to allow the User to make adjustments. To enter a
password, use the UP and DOWN keys to move the cursor to the Enter Password field. Press ENT. Use the UP and DOWN
keys to choose a character. Press ENT to accept and move to the next character. Continue this process until all characters
are entered. Press ENT again to accept the password. The default password is 640275.
2. Select “Yes” to clear the alarm.
3. Go to Main Menu / Settings Icon / Alarm Settings / G1 or G2 ClrRectCommFail.
NOTE! G1 is for the 1st secondary bay rectifier comm fail, and G2 is for the 2nd secondary bay rectifier comm fail.
4. Select “Yes” to clear the alarm.
Clearing a Rectifier Lost Alarm
If the NCU Controller resets while a rectifier communications fail alarm is active, the rectifier communications fail alarm is replace with
a rectifier lost alarm. To clear the alarm, perform the following procedure.
Procedure (NCU Webpages)
1. Using the front panel touch screen PC, log into the NCU webpages.
2. Go to Settings Menu / Rectifiers Tab / Clear Rectifier Lost Alarm.
3. Select “Yes” to clear the alarm.
4. Go to Settings Menu / Rectifiers Tab / G1 or G2 Clear Rectifier Lost Alarm.
NOTE! G1 is for the 1st secondary bay rectifier comm fail, and G2 is for the 2nd secondary bay rectifier comm fail.
5. Select “Yes” to clear the alarm.
Procedure (NCU Local Display and Keypad)
1. Go to Main Menu / Settings Icon / Alarm Settings / Clear Rect Lost.
NOTE! If a password screen opens, a password must be entered to allow the User to make adjustments. To enter a
password, use the UP and DOWN keys to move the cursor to the Enter Password field. Press ENT. Use the UP and DOWN
keys to choose a character. Press ENT to accept and move to the next character. Continue this process until all characters
are entered. Press ENT again to accept the password. The default password is 640275.
2. Select “Yes” to clear the alarm.
3. Go to Main Menu / Settings Icon / Alarm Settings / G1 or G2 Clear Rect Lost.

Vertiv™ NetSure™ 7200 Series -48 VDC Power System User Manual
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NOTE! G1 is for the 1st secondary bay rectifier comm fail, and G2 is for the 2nd secondary bay rectifier comm fail.
4. Select “Yes” to clear the alarm.
5.7 Replacement Information
User Replaceable Components
When a trouble symptom is localized to a faulty rectifier module, controller, or system circuit card; that particular device or circuit card
should be replaced in its entirety. No attempt should be made to troubleshoot or repair individual components on any rectifier
module, controller, or circuit card.
Refer to SAG582127200 (System Application Guide) for replacement part numbers.
Replacement Cables
Refer to SAG582127200 (System Application Guide) for replacement part numbers.
5.8 Replacement Procedures
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
5.8.1 Replacing a Rectifier Module
Refer to the Rectifier Instructions (UM1R483500e) for a rectifier module replacement procedure. Refer also to “System
Troubleshooting Information” on page 12.
The rectifier module being replaced is assigned by the NCU the lowest available identification number. If desired, you can change the
identification number, see “Configuring the NCU Identification of Rectifiers” in the separate Power System Installation Manual
(IM582127200).
5.8.2 Replacing the NCU Controller or a Secondary Control Module
Refer to the NCU Instructions (UM1M830BNA) for a replacement procedure.
5.8.3 Replacing a Distribution Device
General
Replace distribution devices with the same type and rating. Refer to SAG582127200 (System Application Guide) for part numbers.
Safety Fuse Covers
Safety fuse covers are provided for all alarm-type fuses installed in the system. These covers snap onto the fuses and provide
protection from exposed electrical terminations when a fuse opens. Ensure that the safety fuse cover is installed after replacing a fuse.
Refer to Figure 5.4 for installation details. Note that there are different types of safety fuse covers for the different brand alarm-type
fuses.