Amphenol 240GT54 User manual

240GT54/nrg240GT54
Installation Guide

2
240GT54/nrg240GT54
Amphenol Network Solutions
All rights reserved. 6.5.2020 150567
509.926.6000 —amphenol-ns.com.com
Installation Guide, Part Number 150567 A1
Copyright 2020, Amphenol Network Solutions, All rights reserved.
Amphenol Network Solutions
22425 E. Appleway Ave #11
Liberty Lake, WA 99019
Amphenol Network Solutions assumes no liability from the application or use of these products.
Amphenol Network Solutions does not convey any license under its patent rights nor the patent
rights of others. This document and the products described herein are subject to change without notice.
About
Amphenol Network Solutions is a global innovative original equipment manufacturer that serves the data
and communications markets. We design, manufacture, and distribute products for customers who need an
end to end solution for network connectivity, fiber, power distribution and rack management. We collaborate
with our customers to deliver product solutions that exceed expectations with innovative designs and world
class quality. Amphenol Network Solutions is the industry thought leader on network cable management.
Telect, Inc. has been a market leader in secondary DC power distribution
for over 36 years. Through our acquisition by Amphenol and our merger
with All Systems Broadband, to become Amphenol Network Solutions, we
have continued to deliver reliable, high-quality solutions to power, protect,
and monitor today’s network servers and equipment. We are proud to be
an Amphenol company that will continue to be Powered by Telect.
Technical Support
Email: [e-mail]
Phone: [phone]

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Table of Contents
Section One: Overview................................................................................................................................ 6
1.1 About this Guide..............................................................................................................................6
1.2 nrgSMART™ ................................................................................................................................... 6
1.3 240GT54 Configurations..................................................................................................................7
1.4 240GT54 Overview..........................................................................................................................7
1.5 Specifications................................................................................................................................. 10
Section Two: Installation............................................................................................................................ 12
2.1 Important Installation Guidelines.................................................................................................... 12
2.2 Installation Instructions .................................................................................................................. 12
2.2.1 Mounting Brackets............................................................................................................... 13
2.2.2 Tie Bar Installation and Optional 4 Post Mounting Bracket (-C Versions)............................. 13
2.2.3 Optional Tie Bar Installation (-SC Versions)......................................................................... 14
2.2.4 Rack Mounting..................................................................................................................... 15
2.2.5 Grounding............................................................................................................................ 16
2.2.6 Input Wiring.......................................................................................................................... 17
2.2.7 Remove Alarm Cover........................................................................................................... 18
2.2.8 Alarming .............................................................................................................................. 18
2.2.9 Installing TPA Fuses............................................................................................................ 20
2.2.10 Installing GMT Fuses......................................................................................................... 21
2.2.11 Alarm Terminals................................................................................................................. 21
2.2.12 nrgSMART Connectivity (-CTRL Versions) ........................................................................ 22
2.2.13 Output Wiring (Terminal Block Versions) ........................................................................... 24
2.2.14 GMT Output Wiring (Connectorized Versions)................................................................... 25
2.2.15 TPA or Breaker Output Wiring (Connectorized Versions)................................................... 26
2.2.16 Install Rear Cover.............................................................................................................. 28
2.3 TPA Fuse Holder........................................................................................................................... 30
2.3.1 Replacing Fuses.................................................................................................................. 30
2.4 Blanking Cover .............................................................................................................................. 30
2.5 Circuit Breaker Puller..................................................................................................................... 31
2.5.1 Removing Circuit Breakers .................................................................................................. 31
2.6 Contact Removal Tool ................................................................................................................... 31
2.7 Tie Bar (-C Versions)..................................................................................................................... 32
2.8 Tie Bar with 4 Post Mounting Brackets (-C Versions)..................................................................... 32
2.9 Tie Bar (-SC Versions)................................................................................................................... 32

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2.10 Temperature Probes (nrgSMART Versions)................................................................................. 33
2.11 nrgNET Pinouts (nrgSMART Versions)........................................................................................ 34
2.11.1 nrgNET Pinouts (Integrated Controller).............................................................................. 34
2.12 Parts & Accessories..................................................................................................................... 35
2.12.1 Ordering Information.......................................................................................................... 35
2.12.2 GMT Fuses, TPA Fuses and Circuit Breakers.................................................................... 36
2.12.3 Lug Reference Guide......................................................................................................... 38
Section Three: Drawings ........................................................................................................................... 39
3.1 240GT54 Drawings........................................................................................................................ 39
Section Four: Notices (nrgSMART Versions)............................................................................................. 47
4.1 FCC Class A Notice....................................................................................................................... 47
4.2 ICES-003 Class A Notice –Avis NMB-003, Class A ...................................................................... 47
List of Figures
Fig. 1-1: 240GT54 Front View......................................................................................................................7
Fig. 1-2: 240GT54 Rear View...................................................................................................................... 8
Fig. 1-3: 240GT54-SC Front View ...............................................................................................................8
Fig. 1-4: 240GT54-C Rear View .................................................................................................................. 8
Fig. 2-1: Installing Mounting Brackets........................................................................................................ 13
Fig. 2-2: Installing -C Tie Bar..................................................................................................................... 13
Fig. 2-3: Installing Optional 4 Post Mounting Brackets............................................................................... 14
Fig. 2-4: Installing Optional -SC Tie Bar..................................................................................................... 14
Fig. 2-5: Installing Panel in Rack ............................................................................................................... 15
Fig. 2-6: Grounding Lug Connection.......................................................................................................... 16
Fig. 2-7: Input Lugs.................................................................................................................................... 17
Fig. 2-8: Removing the Alarm Cover.......................................................................................................... 18
Fig. 2-9: DIP Switches............................................................................................................................... 18
Fig. 2-10: 240GT54 LED Status................................................................................................................. 19
Fig. 2-11: Remove Fuse Holder................................................................................................................. 20
Fig. 2-12: Installing TPA Fuse.................................................................................................................... 20
Fig. 2-13: nrg240GT54 Alarm Terminals.................................................................................................... 21
Fig. 2-14: CTRL Panel Connectivity Ports ................................................................................................. 23
Fig. 2-15: Output Lugs............................................................................................................................... 24
Fig. 2-16: Insert Crimped Terminals........................................................................................................... 25
Fig. 2-17: Connector Front View................................................................................................................ 25
Fig. 2-18: Insert Retainer........................................................................................................................... 25
Fig. 2-19: Insert Crimped Terminals........................................................................................................... 26
Fig. 2-20: Connector Front View................................................................................................................ 26

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Fig. 2-21: Insert Retainer........................................................................................................................... 26
Fig. 2-22: Insert Connector........................................................................................................................ 27
Fig. 2-23: Rear Cover (Standard Versions)................................................................................................ 28
Fig. 2-24: Rear Cover (-C Versions) .......................................................................................................... 29
Fig. 2-25: Rear Cover (-SC Versions)........................................................................................................ 29
Fig. 2-26: Included TPA Fuse Holder PN: 307492..................................................................................... 30
Fig. 2-27: Optional Blanking Cover PN: 150203+03 .................................................................................. 30
Fig. 2-28: Optional Circuit Breaker Puller PN: 307491............................................................................... 31
Fig. 2-29: Optional Contact Removal Tool PN: 150797.............................................................................. 31
Fig. 2-30: Tie Bar (Included with -C Versions) ........................................................................................... 32
Fig. 2-31: Tie Bar with Optional 4 Post Mounting Brackets (-C Version) PN: 307622................................. 32
Fig. 2-32: Optional Tie Bar (-SC Versions) PN: 307661............................................................................. 32
Fig. 2-33 Optional nrgTEMP Temperature Probe (nrgSMART Versions) PN: nrgTEMP ............................ 33
Fig. 2-34: nrgNET Pinout Connections (Integrated Controller)................................................................... 34
Fig. 3-1: Front View (Passive Versions)..................................................................................................... 39
Fig. 3-2: Front View (nrgSMART -CTRL Versions) .................................................................................... 39
Fig. 3-3: Front View (nrgSMART -SENS Versions).................................................................................... 39
Fig. 3-4: Side View (Standard and -SC Versions)...................................................................................... 39
Fig. 3-5: Side View (-C Versions)............................................................................................................... 40
Fig. 3-6: Rear View (240GT54).................................................................................................................. 40
Fig. 3-7: Rear View (nrg240GT54-CTRL and nrg240GT54-SENS)............................................................ 40
Fig. 3-8: Rear View (240GT54-C).............................................................................................................. 40
Fig. 3-9: Rear View (nrg240GT54-CTRL-C and nrg240GT54-SENS-C) .................................................... 41
Fig. 3-10: Rear View (240GT54-SC).......................................................................................................... 41
Fig. 3-11: Rear View (nrg240GT54-CTRL-SC and nrg240GT54-SENS-SC).............................................. 41
Fig. 3-12: Bottom View (Standard Versions).............................................................................................. 42
Fig. 3-13: Bottom View (-C Versions)......................................................................................................... 43
Fig. 3-14: Bottom View (-SC Versions)...................................................................................................... 44
Fig. 3-15: Optional 4 Post Mounting Bracket (-C Versions)........................................................................ 45
Fig. 3-16: Optional Tie Bar (-SC Versions)................................................................................................. 46

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Section One: Overview
1.1 About this Guide
This manual provides a comprehensive overview of and installation guidelines for the 240GT54 family of power
distribution panels. While care has been taken to define all necessary information, complete details may not be
covered. If you have any questions, contact Amphenol Network Solutions Technical Support at
[e-mail] or call 1-509-926-6000.
Throughout this guide, select information is highlighted in the form of Notes, Alerts, Cautions, and Warnings.
These notifications are prominent, and their importance is indicated as follows:
NOTE: General information to which the user should pay special attention.
ALERT! Important information and/or instructions to which the user should adhere.
CAUTION! Indicates a hazardous situation, which could result in minor or moderate injury.
WARNING! Indicates a hazardous situation, which could result in death or serious injury.
Amphenol Network Solutions assumes no liability from the application or use of these products. Amphenol
Network Solutions does not convey a license under its patent rights, nor the patent rights of others. This
document and the products described herein are subject to change without notice.
1.2 nrgSMART™
nrgSMART describes the family of distributed network monitoring and management products, from BDFBs to
high-current and low-current secondary panels. nrgSMART allows you to collect performance data on
distributed assets and tools to help you efficiently access business critical and actionable information.
Amphenol Network Solutions recognizes the industry need to manage distributed assets more efficiently, get
better power performance out of deployed assets, as well as pursue realistic and achievable alternative energy
goals. Through nrgSMART, access to data at the equipment level provides the foundation for managing
performance of a distributed DC power distribution system.
•Individual circuit monitoring: Measure power at the circuit level. This enables powerful trend analysis
and insights into equipment performance and enables preventative maintenance processes.
oHigh accuracy, 100% passive monitoring, with no calibration required.
oCollect voltage and current for both feed and output circuit.
oCollect temperature using optional nrgTEMP probes.
•Network data collection: Intelligent interpretation of the collected data, based on equipment data
signature (smart alarms), drives relevant business decisions.

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1.3 240GT54 Configurations
GMT/TPA Combination Fuse Panel:
Part Number:
240A Dual-Feed, 5/4 Panel, Vertical Inputs, Output Terminal Blocks
240GT54
240A Dual-Feed, 5/4 Panel, Horizontal Inputs, Connectorized Outputs
(Connectors purchased separately)
240GT54-C
240A Dual-Feed, 5/4 Panel, Vertical Inputs, Connectorized Outputs (Tie Bar
and Connectors purchased separately)
240GT54-SC
nrgSMART Circuit Monitoring, Controller, 240A Dual-Feed, 5/4 Panel, Vertical
Inputs, Output Terminal Blocks
nrg240GT54-CTRL
nrgSMART Circuit Monitoring, Sensor, 240A Dual-Feed, 5/4 Panel, Vertical
Inputs, Output Terminal Blocks
nrg240GT54-SENS
nrgSMART Circuit Monitoring, Controller, 240A Dual-Feed, 5/4 Panel,
Horizontal Inputs, Connectorized Outputs (Connectors purchased separately)
nrg240GT54-CTRL-C
nrgSMART Circuit Monitoring, Sensor, 240A Dual-Feed, 5/4 Panel, Horizontal
Inputs, Connectorized Outputs (Connectors purchased separately)
nrg240GT54-SENS-C
nrgSMART Circuit Monitoring, Controller, 240A Dual-Feed, 5/4 Panel, Vertical
Inputs, Connectorized Outputs (Tie Bar and Connectors purchased separately)
nrg240GT54-CTRL-SC
nrgSMART Circuit Monitoring, Sensor, 240A Dual-Feed, 5/4 Panel, Vertical
Inputs, Connectorized Outputs (Tie Bar and Connectors purchased separately)
nrg240GT54-SENS-SC
1.4 240GT54 Overview
The Amphenol Network Solutions 240GT54 family of 1RU, dual-feed 240A per feed, power distribution panels
provide high-capacity, ±48V, ±24V, and ±12V power protection for secondary power distribution to data and
communications equipment. The Amphenol Network Solutions 240GT54 family panels are also ideal for
primary distribution in small central offices and at remote sites.
Fig. 1-1: 240GT54 Front View

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This panel accommodates Cooper Bussmann and Littelfuse GMT fuses and Cooper Bussmann TPA fuses. As
an optional accessory, AIRPAX 1U circuit breakers can be used as an alternate to TPA fuses. The panel has
positions for 10 GMT fuses and 8 bullet-style, plug-in fuse holders or breakers. These 1RU fuse holders
feature an ergonomic front grip for easy removal, sliding top cover to protect the fuse from above, and red
alarm plunger to indicate a failed fuse. Circuit breakers are an optional accessory that can be installed with a
protective cover to protect against unintended on or off switching. Circuit breaker covers are included with all
panels. The panel is UL rated using 20A GMT fuses with a maximum continuous output load of 16A, using 50A
TPA fuses with a maximum continuous output load of 40A, and using 60A circuit breakers with a maximum
Fig. 1-2: 240GT54 Rear View
Fig. 1-3: 240GT54-SC Front View
Fig. 1-4: 240GT54-C Rear View

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continuous output load of 48A. GMT, TPA fuses, and breakers are sold separately. See amphenol-ns.com to
order GMT fuses, TPA fuses, and breakers.
Sides A and B are electrically isolated including the alarm card, which contains power and fuse status relays
with dry, Form-C contacts. The contacts are connected to wire-wrap pins for connecting to external
visual/audio alarms. Pins can also mate to a TE Connectivity 3-640428-3 connector. The alarm card also
controls the four indicator LEDs on the front panel.
This panel is available with standard terminal block outputs or connectorized outputs. All input, output and
alarm terminals are within the panel.
For the standard configurations, the feed inputs are vertical dual stud terminals, and the outputs are staggered
terminal blocks to accommodate waterfall cable management. The BATT and RTN inputs accommodate dual-
hole lugs and the outputs accommodate single-hole lugs. The input terminals are studs, while the output
terminals are screws.
For the -C configurations, the feed inputs are horizontal busbars, and the outputs are connectors. This allows
input and output cables to exit straight back from the panel. The BATT and RTN inputs accommodate dual-
hole lugs. The input landings have holes with 5/8” to 1” spacing. The outputs accommodate connectors that
are easily assembled during installation.
For the -SC configurations, the feed inputs are vertical dual stud terminals, and the outputs are connectors.
The input cables can be routed directly from above and the output cables exit straight back from the panel. The
BATT and RTN input terminals are studs and accommodate dual-hole lugs. The outputs accommodate
connectors that are easily assembled during installation.
The ground terminals can accommodate either dual-hole or single-hole lugs. The ground terminals are bolt
connections on the sides of the panel, near the rear, and on the bottom of the panel, near the center rear. Only
one ground connection is required.
The nrgSMART panels are now available with an integrated controller, designated with a “CTRL” in the part
number. This embeds a primary controller directly into the fuse panel, eliminating the need for a separate
external controller. For customers that desire 1-point connectivity to a single controller for multiple panels,
nrgSMART Sensor panels can be connected to the Controller (CTRL) panel. These Sensor panels are
designated with “SENS” in the part number. The Sensors panel contain all required nrgSMART sensing
electronics but do not contain the controller electronics. The nrgSMART electronics of Controller and Sensor
panels are powered directly off the A and B feeds, while legacy panels are powered off the primary separate
external controller through the nrgNET cable. Since, the CTRL panel does not provide power through the
nrgNET cable, legacy panels cannot be connected to it. Sensor panels are capable of being daisy chained with
legacy nrgCONTROL-BT external controllers. The nrgCONTROL-BT still requires the use of a service link.
NOTE: Do not connect multiple CTRL panels together.
NOTE: Do not connect a CTRL panel to an nrgCONTROL-BT external controller.
For flexibility, a Sensor panel can be upgraded to include an integrated Controller, and a CTRL panel can be
downgraded to a SENS panel. Changes can be made in the field by exchanging a circuit board and front
panel. Contact Amphenol Network Solutions for more details.

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1.5 Specifications
Inputs:
Specifications:
Voltage range (nominal voltage)
±12VDC, ±24VDC and ±48VDC
Max. input load rating
240A @ 45°C per panel (De-rated to 160A @ 65°C)
Short circuit withstand rating
5000A
Nominal power loss at full load
Less than 45W per side @11,520W full load per side (240A x 48V);
240A @ 45°C per panel
Percentage of full power dissipation at nominal
voltage
Less than 0.5%
Max. input interrupt device
125% of panel rating (for 240A rated feeds)
Optional (Standard and -SC versions): Vertical input
terminal studs (with Keps nuts and flat washers) for
dual-hole compression lugs
Two pairs of 3/8-16 studs on 1" centers per terminal [max. lug width of 1.15"
(29.2 mm)]. Torque nut (using 9/16" or 15 mm socket) to 150 in/lb. (~17
N•m), max.
Optional (-C Versions): Horizontal input terminal
landings (with Keps nuts, flat washers, and bolts) for
dual-hole compression lugs
Two pairs of 3/8” holes on 5/8”-1" centers per terminal [max. lug width of 1.5"
(38.1 mm)]. Torque bolt and nut (using 9/16" or 15 mm sockets) to 150 in/lb.
(~17 N•m), max.
Input wire size
2/0 AWG to 350 MCM
Grounding:
Specifications:
Earth GND terminal bolts (with spring washers and
flat washers) for dual-hole compression lug
Three sets of 1/4-20 threaded holes on 5/8" centers. [max. lug width of .50"
(12.7 mm)]. Torque bolts (using 7/16" or 12 mm socket) to 50 in/lb. (5.5
N•m), max.
Ground wire size
#14 AWG to #4 AWG
Outputs:
Specifications:
Output fuse
20A GMT fuse
50A TPA fuse
60A circuit breaker
Output load
16A continuous GMT fuse
40A continuous TPA fuse
48A continuous circuit breaker
Minimum short circuit interrupt rating
5000A
Optional (Standard Versions): Terminal blocks,
single-hole compression lugs
10, #6-32 screws [max. lug width of .32" (8.1)]. Torque screw to 8 in/lb. (.9
N•m), max. GMT fuse
8, #10-32 screws [max. lug width of .50" (12.7)]. Torque screw to 20 in/lb.
(2.3 N•m), max. TPA fuse or circuit breaker
Optional (Standard Versions): Output wire size,
single-hole compression lug
#22 AWG to #6 AWG, GMT fuse
#14 AWG to #4 AWG, TPA fuse or circuit breaker
Optional (-C and -SC Versions): Connectors
(purchased separately)
10, P24 connector plugs, latching, safe touch, GMT fuse
8, P40 connector plugs, latching, safe touch, TPA fuse or circuit breaker
Optional (-C and -SC Versions): Output wire size,
connectors
#14 AWG to #10 AWG, GMT fuse
#12 AWG to #6 AWG, TPA fuse or circuit breaker
GMT fuses
Cooper Bussmann and Littelfuse
TPA fuses
Cooper Bussmann
Circuit breaker
AIRPAX 1U Series
Alarms:
Specifications:
Alarm relay contacts
2A @ 30 VDC; 0.6A @ 60 VDC
Max. alarm card power rating
@12V: 18mA (0.22W) @24V: 20mA (0.48W); @48V: 30mA (1.44W)
Alarm wire size
#24 AWG, typical (#26 to #20 AWG)
Terminals
Wire wrap or mates with TE Connectivity 3-640428-3

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Dimensions:
Specifications:
240GT54/ nrg240GT54 Height:
Depth:
Width:
240GT54-C/nrg240GT54-C Height:
Depth:
Width:
240GT54-SC/nrg240GT54-SC Height:
Depth:
Width:
1.75" (44 mm)
13.5" (344 mm)
17.0" (432 mm) without brackets
19” and 23” brackets included with panel
1.75" (44 mm)
18.7" (475 mm) without tie bar
21.9" (557 mm) with tie bar
17.0" (432 mm) without brackets
19” and 23” brackets included with panel
Tie bar included with panel
Cable-end connectors not included with panel
1.75" (44 mm)
13.5" (344 mm) without tie bar
17.0” (432mm) with tie bar
17.0" (432 mm) without brackets
19” and 23” brackets included with panel
Tie bar and cable-end connectors not included with panel
Compliance:
Specifications:
UL
Listed
NEBS
Level 3
Voltage Sensor (nrgSMART model only):
Specifications:
Sensor accuracy
-19.99 to +19.99V: ± 0.3V
-20V to -60V: ± 0.1V
+20V to +60V: ± 0.1V
Voltage measurement range
-60 to +60 VDC
NOTE:
• Voltage measurement may be slightly different than at input terminal blocks due to the voltage drop within the panel.
• Sensors are factory calibrated and do not require user adjustment.
Current Sensor (nrgSMART model only):
Specifications:
Precision / accuracy
±5% precision, ±0.25A accuracy
Example: 40A current, will measure 40A ± (40A*5%) ± 0.25A
= 40A ± 2.0A ± 0.25A
= 37.75A to 42.25A
Communication (nrgSMART model only):
Specifications:
nrgOS minimum required version
nrgOS 4.1.0
nrgNET communication protocol
Proprietary serial protocol used to communicate between panels and
controller
nrgNET connector
Removable 5-pin connector with screw down terminals
nrgNET connector functions
nrgNET IN from the Controller or upstream nrgSMART panel, nrgNET OUT
to downstream nrgSMART panel

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Section Two: Installation
2.1 Important Installation Guidelines
•Elevated Operating Ambient Temperature: If installed in a closed or multi-unit rack assembly, the
operating ambient temperature of the rack environment may be greater than room ambient. Consider
installing the equipment in an environment compatible with the maximum ambient temperature (Tma)
specified by the manufacturer.
•Reduced Air Flow: Maintain the amount of air flow required for safe operation when installing the
equipment in a rack.
•Mechanical Loading: Ensure mechanical loading is even to prevent hazardous conditions.
•Circuit Overloading: Overloading circuits may affect your overcurrent protection and supply wiring. Use
equipment nameplate ratings.
•Reliable Earthing: Maintain reliable earthing of rack-mounted equipment. Pay attention to supply
connections other than direct connections to the branch circuit.
•Disconnect Device: Incorporate a readily accessible disconnect device in the building installation wiring.
2.2 Installation Instructions
ALERT! Only qualified technicians may install and maintain this product. Verify all connections meet
requirements specified in local electric codes or operating company guidelines before supplying
power. Protect this equipment with a breaker sufficient to interrupt power levels specified.
ALERT! Verify all connections meet requirements specified in local electric codes or operating
company guidelines before supplying power. Unit shall be protected by a listed circuit breaker or
branch-rated fuse rated minimum 125% of panel rating (for 240A rated feeds).
ALERT! Install this product in locations accessible only to qualified personnel.
Please read these instructions carefully before beginning installation. If assistance is required, call Amphenol
Network Solutions Technical Support at 1-509-926-6000 or email us at [e-mail].
When you receive the equipment, carefully unpack it and compare it to the packaging list. Please report any
defective or missing parts to Amphenol Network Solutions Quality at quali[email protected] or call 1-509-
926-6000.
Amphenol Network Solutions is not liable for transit damage. If the product is damaged, please report it to the
carrier and contact Amphenol Network Solutions Quality.
NOTE: For service or warranty information, please visit amphenol-ns.com and click on the support tab, email
Amphenol Network Solutions at [e-mail] or call us at 1-509-926-6000.
NOTE: The 240GT54 family is suitable for installation as part of a Common Bonding Network (CBN) for
installation in Network Telecommunication Facilities and OSP.
NOTE: The 240GT54 family is DC-I and can be grounded in both CBN and IBN networks. All feeds have
isolated returns and the chassis grounds are isolated from all returns. The 240GT54 family is suitable
for installation in Network Telecommunication Facilities and in locations where the NEC applies.

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2.2.1 Mounting Brackets
1. The mounting brackets can be installed in 6 positions, from flush to 5 inch offset in 1 inch increments. Use
included hardware to install the mounting brackets. Both 19” and 23” mounting brackets are included.
2. Tighten screws to 20 in/lb. (2.23 N•m).
2.2.2 Tie Bar Installation and Optional 4 Post Mounting Bracket (-C Versions)
3. Use included undercut hardware to install tie bar. Standard tie bar is included in -C connectorized panels.
4. Tighten screws to 20 in/lb. (2.3 N•m).
Fig. 2-1: Installing Mounting Brackets
Fig. 2-2: Installing -C Tie Bar

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5. 4 post mounting brackets are an optional accessory for -C connectorized panels and purchased separately.
Slide 4 post mounting brackets into the tie bar. This step can also be done after the front of the panel is
mounted in the rack.
2.2.3 Optional Tie Bar Installation (-SC Versions)
6. Tie bar is an optional accessory for -SC connectorized panels and is purchased separately. Use hardware
included in accessory kit to install tie bar.
7. Tighten screws to 20 in/lb. (2.3 N•m).
Fig. 2-3: Installing Optional 4 Post Mounting Brackets
Fig. 2-4: Installing Optional -SC Tie Bar

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2.2.4 Rack Mounting
8. Locate an unused rack position and mount the panel using two sets of fasteners per side, as shown in Fig.
2-5. Mount the panel as high as possible on the rack. Use a seismic rack for best rigidity.
9. Tighten screws to 35 in/lb. (3.9 N•m).
Fig. 2-5: Installing Panel in Rack

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2.2.5 Grounding
WARNING! Failure to properly ground this equipment can create hazardous conditions to installation
personnel and to the equipment.
ALERT! Only use components and crimping tools approved by agencies or certifying bodies
recognized in your country or region such as Underwriter’s Laboratories (UL), TUV, etc.
10. Use an approved crimping tool to attach an approved, dual-hole compression lug onto suitable grounding
wire. (Size of ground depends on input interruption device.)
11. If required, lightly coat antioxidant on lug and grounding surface on the side or bottom of the panel.
Connect the lug using 1/4-20 bolts, split washers and flat washers provided, as shown in Fig. 2-6.
12. Tighten the bolt to 50 in/lb. (5.6 N•m).
Fig. 2-6: Grounding Lug Connection

17
240GT54/nrg240GT54
Amphenol Network Solutions
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509.926.6000 —amphenol-ns.com.com
2.2.6 Input Wiring
WARNING! Before connecting input power cables, make sure input power to the panel is turned off.
13. Make sure input power is off before connecting the panel’s input cables to the PDU or battery.
14. For input wiring, crimp dual-hole compression lugs onto 2/0 AWG to 350 MCM copper wires. The choice of
input wiring depends on the following criteria:
•Input interrupt device rating affects the size of input wiring.
•Ambient operating temperature affects the type of input wire insulation. For further information,
consult the National Electrical Code (NEC).
15. Insulate the lug barrels with UL94 V-0 rated heat-shrink tubing.
16. Clean terminals and lugs with a non-abrasive, non-metallic pad.
17. If required, lightly coat antioxidant on lugs and input BATT and RTN terminals and then connect lugs to
input terminals, as shown in Fig. 2-6.
18. Tighten nut to 150 in/lb. (~17 N•m), max.
Fig. 2-7: Input Lugs

18
240GT54/nrg240GT54
Amphenol Network Solutions
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509.926.6000 —amphenol-ns.com.com
2.2.7 Remove Alarm Cover
19. Remove alarm cover using Phillips screwdriver, as shown in Fig. 2-8. Once the front cover has been taken
off the panel, remove and discard the small pink packaging foam piece inside the front cover.
2.2.8 Alarming
20. When installing TPA fuses or breakers into the fuse holders, turn on the corresponding DIP switch by
flipping the switch on (down position). This will turn on the alarming function for the TPA fuses or
breakers that are installed. If a fuse or breaker is not installed, that corresponding DIP switch needs to
be turned off (up position) to prevent false alarming. For side A, dip switches are numbered 1-4 and
correspond to the matching fuse holder position. For side B the dip switches are numbered 5-8, where
dip switch 5 corresponds to fuse position 1 and dip switch 8 corresponds to fuse of breaker position 4.
NOTE: Side A dip switches 5-8, and side B dip switches 1-4, are not used and should remain in the off (up)
position to prevent false alarming.
Fig. 2-8: Removing the Alarm Cover
Fig. 2-9: DIP Switches
Unused DIP switches
Used DIP switches

19
240GT54/nrg240GT54
Amphenol Network Solutions
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509.926.6000 —amphenol-ns.com.com
NOTE: For nrgSMART panel only. When removing or installing new GMT fuses, TPA fuses, or circuit
breakers, ensure the changes are updated in the nrgSMART configuration wizard.
21. With all the GMT positions uninstalled, TPA fuse holders
empty, or breakers off enable the breaker at the primary
distribution unit or battery, 125% of panel rating (for 240A rated
feeds) to turn on Feed A to Side A of the panel. Check voltage
and polarity at input connectors of the panel.
Verify the following:
•A PWR LED on the front of panel turns green
•A ALM LED on the front of panel turns red
•B PWR LED remains off
•B ALM LED remains off
22. With A PWR LED green (normal operation) and A ALM LED
red (alarm state) —but with B PWR LED and B ALM LED off
—test ALM relay and contact alarm terminals:
•Expect an open circuit (∞Ω) between terminals C and NC
•Expect continuity (0Ω) between terminals C and NO
23. With no output wires connected or with the output loads (devices fed by this panel) disabled, install GMT
fuses and TPA fuses into the fuse holders or turn on breakers, see section 2.2.9 and 2.2.10.
Verify the following:
•A PWR LED on the front of panel turns green
•A ALM LED turns off
•B PWR LED remains off
•B ALM LED remains off
24. If A ALM LED is red, verify that all of the DIP switches for all empty TPA fuse or circuit breaker positions
are up (OFF).
25. With A PWR LED green (normal operation) and A ALM LED off (normal state) —but with B PWR LED and
B ALM LED off —test A ALM relay and contact terminals:
•Expect continuity (0Ω) between terminals C and NC
•Expect an open circuit (∞Ω) between terminals C and NO
26. Repeat steps 21-25 to power up side B. A PWR and B PWR LEDs must both be green.
27. Reinstall the cover to the front of the panel using the thumb screws or a Phillips screwdriver.
A PWR
LED
B ALM
LED
A ALM
LED
B PWR
LED
Fig. 2-10: 240GT54 LED Status
nrg
LED

20
240GT54/nrg240GT54
Amphenol Network Solutions
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509.926.6000 —amphenol-ns.com.com
2.2.9 Installing TPA Fuses
28. Remove fuse holder from panel.
29. Open fuse holder cover by sliding it back. Install fuse into fuse holder. Ensure the fuse is inserted in the
proper orientation. Close fuse holder cover.
NOTE: Ensure the corresponding DIP switches for installed fuses are in the down (ON) position and that the
DIP switches for the corresponding empty positions are in the up (OFF) position.
30. Install fuse holders in the desired circuit. Ensure “Line” is on top.
Fig. 2-11: Remove Fuse Holder
Fig. 2-12: Installing TPA Fuse