Vertiv Liebert NXL User manual

Liebert®NXL™Power-Tie Controls
Installation Manual

CONTACTING VERTIV™FOR SUPPORT
Contact Vertiv Services for information or repair service in the United States at 800-543-2378.
For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services, if available
in your area. For areas not covered by Vertiv Services, the authorized distributor is responsible for providing
qualified, factory-authorized service.
Have the following information available before calling Vertiv Services:
Part Numbers: _____________________________________________________________________________
Serial Numbers: ____________________________________________________________________________
kVA Rating: ________________________________________________________________________________
Date Purchased: ___________________________________________________________________________
Date Installed: _____________________________________________________________________________
Location: ___________________________________________________________________________________
Input Voltage/Frequency: __________________________________________________________________
Output Voltage/Frequency: ________________________________________________________________
Battery Reserve Time: _____________________________________________________________________
Product Warranty Registration
To register for warranty protection, visit the Service and Support section of our Web site at:
www.vertivco.com
Click on Product Registration and fill out the form.

Vertiv |Liebert
®NXL™Power-Tie™Installation Manual | Rev. 6 | 06/17 i
TABLE OF CONTENTS
CONTACTING VERTIV™FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.0 MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.0 CONTROL CONNECTIONS AND COMMUNICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Control Cable and Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2.1.1 Programmable Relay Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Inter-Module Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . .7
3.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
FIGURES
Figure 1 External Interface Board connections layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Figure 2 Breaker Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Figure 3 Voltage and Current Sensing Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 4 Control wiring, Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 5 Programmable relay board dialog box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 6 Control wiring layout for Liebert NXL Power-Tie. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7 Liebert NXL Power-Tie System #1 layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 8 Liebert NXL Power-Tie System #2 or #3 layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 9 Liebert NXL Power-Tie control wiring for single system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
TABLES
Table 1 Programmable Relay Board pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Table 2 Cable group #22A - from SIB breaker interface board (BIB) to SIB breaker. . . . . . . . . . . . . . . . . . . . . . .7
Table 3 Cable group #22B - from SIB breaker interface board (BIB) to breaker motor operator
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 4 Cable group #23A - from tie breaker interface board (BIB) to tie breaker . . . . . . . . . . . . . . . . . . . . . . . .7
Table 5 Cable group #23B - from tie breaker interface board (BIB) to breaker motor operator
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 6 Cable group #24A - from MBB breaker interface board (BIB) to MBB breaker . . . . . . . . . . . . . . . . . . . .7
Table 7 Cable group #24B - from MBB breaker interface board (BIB) to breaker motor operator
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Table 8 Cable group #25A - from MIB breaker interface board (BIB) to MIB breaker . . . . . . . . . . . . . . . . . . . . .8
Table 9 Cable group #25B - from MIB breaker interface board (BIB) to breaker motor operator
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Table 10 Cable group #26A - from LBB breaker interface board (BIB) to LBB breaker . . . . . . . . . . . . . . . . . . . . .8
Table 11 Cable group #27A - parallel from SCC/UPS inter-module communication board to
Liebert NXL Power-Tie inter-module communication board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Table 12 Cable group #27B - redundant parallel from SCC/UPS inter-module communication
board to Liebert NXL Power-Tie inter-module communication board . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Vertiv |Liebert
®NXL™Power Tie™Installation Manual | Rev. 6 | 06/17 ii
Table 13 Cable group #28A - parallel from Liebert NXL Power-Tie inter-module communication
board to next Liebert NXL Power-Tie inter-module communication board . . . . . . . . . . . . . . . . . . . . . . 9
Table 14 Cable group #28B - redundant parallel Liebert NXL Power-Tie inter-module
communication board to next Liebert NXL Power-Tie inter-module communication
board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 15 Cable group #29A - from MBB breaker interface board to SKRU interface . . . . . . . . . . . . . . . . . . . . . . 9
Table 16 Cable group #29B - from MBB breaker interface board to SKRU interface . . . . . . . . . . . . . . . . . . . . . . 9
Table 17 Cable group #32 - from Liebert NXL Power-Tie control terminal block to voltage and
current sense points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 18 Liebert NXL Power-Tie Control specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your Liebert NXL
Power-Tie Controls. Read this manual thoroughly, paying special attention to the sections that apply to your
installation, before working with the unit. Retain this manual for use by installing personnel.
NOTICE
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J of the FCC rules. These limits
provide reasonable protection against harmful interference in a commercial environment. This unit generates, uses and
radiates radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause
harmful interference to radio communications. Operation of this unit in a residential area may cause harmful interference
that the user must correct at his own expense.
WARNING
Risk of electrical shock. Can cause personal injury or death.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and
glasses should be involved in installing the modules or preparing the modules for installation. When
performing maintenance with any part of the equipment under power, service personnel and test
equipment should be standing on rubber mats.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or those approved
for use in fighting electrical fires.
Extreme caution is required when performing installation and maintenance.
Special safety precautions are required for procedures involving handling, installation and maintenance of
the UPS system. Observe all safety precautions in this manual before handling or installing the module.
Observe all precautions in the Operation and Maintenance Manual before as well as during performance
of all maintenance procedures.
WARNING
Risk of electrical shock and fire. Can cause equipment damage, personal injury or death.
Under typical operation and with all doors closed, only normal safety precautions are necessary. The area
around the system should be kept free of puddles of water, excess moisture and debris.
Only test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC voltmeter to ensure safety before making contact or using tools.
Even when the power is turned Off, dangerously high potential electric charges may exist at the capacitor
banks.
All wiring must be installed by a properly trained and qualified electrician. All power and control wiring
must comply with all applicable national, state and local codes.
One person should never work alone, even if all power is disconnected from the equipment. A second
person should be standing by to assist and to summon help in case of an accident.
NOTE
Materials sold hereunder cannot be used in the patient vicinity (e.g., use where UL, cUL or IEC 60601-1 is
required). Medical applications, such as invasive procedures and electrical life-support equipment, are subject to
additional terms and conditions.

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 2
1.0 MECHANICAL INSTALLATION
1.1 Introduction
The Liebert NXL Switchgear provides continuous, high-quality AC power to your business-critical equipment,
such as telecommunication and data processing equipment. Liebert NXL UPS’s will supply power that is free of
the disturbances and variations in voltage and frequency common to utility power, which is subject to brownouts,
blackouts, surges and sags.
The Liebert NXL Power-Tie system provides manually initiated, uninterrupted transfers of a critical load bus
between the two UPS systems.
This topology permits one UPS and its associated distribution system to be shut down for maintenance while the
load continues to be supplied by another UPS, without the necessity of transferring the load to bypass during
shutdown or restart of the UPS being maintained.
1.2 Preliminary Checks
This chapter is a guide to general procedures and practices that should be observed by the installing personnel.
The particular conditions of each site will determine the applicability of such procedures.
Before installing the Liebert NXL Power-Tie, make these preliminary checks:
• Examine the Liebert NXL Power-Tie for transit damage, both internally and externally. Report any damage to the shipper
immediately.
• Verify that the correct equipment is being installed. The Liebert NXL Power-Tie cabinet has an identification tag on the
interior doors listing the type, size and main calibration parameters of the UPS.
• Verify that the UPS room satisfies the environmental conditions stipulated in the equipment specification, paying particular
attention to the ambient temperature and air exchange system.

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2.0 CONTROL CONNECTIONS AND COMMUNICATION
2.1 Control Cable and Communication
Figure 1 External Interface Board connections layout
Figure 2 Breaker Interface Board
P66C P99C
TB0823
EPO
STATUS
TB0829
EXTERNAL
CAN
TB1154B TB1154A
TB0825
TB0824
TB0826
TB0820 TB0818
TB0817
TB0819
TB0816
TB0830
TB035TB0821
P0801
TB0811
TB0810
TB0813
TB0812
TB0815
P0832
P0831
P0808
OPT
PS
INT BATT
CAN
EXT BATT
CAN
REPO
J4
REPO
FORM C
LBS VOLTAGE
EXTERNAL
CAN MOB
MIB
RIB
MBB
BIB
KEY
STATUS
INV
CNTRLN
RECT
CNTL
BYP CNTL
ON GEN
ACT FILT
STATUS
BATT GND
FLT
ACT FILT
CNTL
MAINT BYP
ENABLE
AUX SPARE
TEMP
J5
BATT MTR
OP TB1156
TB 1158 TB1154
1
2
3
4
5
1
2
3
4
5
6
7
T B1150TB 1151
1 2
P1155
1
2
3
4
1
2
3
4
5
6
7
8
BIB
CAUTION:
HAZARDOUS
VOLTAGES
TB 1123
1
2
BREAKER
INTERFACE BOARD
Form-C Aux
Contacts
48VDC Shunt Trip
Optional M otor
Operator

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Figure 3 Voltage and Current Sensing Terminal
TB1
TB2
TB3
TB4
TB5
TB6
TB19
TB20
TB21
TB22
TB23
TB24
TB25
TB26
TB27
TB28
TB29
TB30
TB31
TB32
TB33
TB34
TB35
TB36
TB37
TB38
TB7
TB8
TB9
TB10
TB11
TB12
TB13
TB14
TB15
TB16
TB17
TB18
1
1
1
1
Future
NOTES:
1. TB1–TB6 are shorting switches . During normal operation , these
devices are open . When button is depressed and turned 90˚(locked
position) the associated CT is shorted. Reference Table “CT
SHORTING TABLE” on this sheet.
2. TB19-TB38 are disconnect devices . During normal operation these
devices are closed. All external wiring into TB 19-TB38 must be
fused at the source.
TIE Bus Voltage, Phase A
UPS Source Power Supply, Phase A
Critical Load Bus, Phase A CT X1
Critical Load Bus, Phase A CT X2
Critical Load Bus, Phase B CT X1
Critical Load Bus, Phase B CT X2
Critical Load Bus, Phase C CT X1
Critical Load Bus, Phase C CT X2
CT SHORTING TABL E
TB1
TB2
TB3
TB4
TB5
TB6
TB# SHORTS CT
LOAD I PHA
LOAD I PHB
LOAD I PHC
UPS I PHA
UPS I PHB
UPS I PHC
F1
8A
F2
8A
F3
8A
F4
8A
F5
8A
F6
8A
UPS Source, Phase A CT X1
UPS Source, Phase A CT X2
UPS Source, Phase B CT X1
UPS Source, Phase B CT X2
UPS Source, Phase C CT X1
UPS Source, Phase C CT X2
TIE Bus Voltage, Phase B
TIE Bus Voltage, Phase C
Neutral
Critical Load Bus Voltage, Phase A
Critical Load Bus Voltage, Phase B
Critical Load Bus Voltage, Phase C
Neutral
Bypass Source Voltage, Phase A
Bypass Source Voltage, Phase B
Bypass Source Voltage, Phase C
Neutral
UPS Source Voltage, Phase A
UPS Source Voltage, Phase B
UPS Source Voltage, Phase C
Neutral
Future
Future
Future
UPS Source Power Supply, Phase B
Bypass Source Power Supply, Phase A
Bypass Source Power Supply, Phase B
Optional Power Supply
Optional Power Supply
CAUTION:
TB19–TB38 and F1-F6 connected to
HAZARDOUS VOLTAGES
Note 1

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2.1.1 Programmable Relay Board
The Programmable Relay Board (PRB) provides a means to trigger an external device when an event occurs in
the Liebert NXL. Each PRB has eight channels. Each channel has Form-C dry contacts rated at 1A @ 30VDC or
125VAC @ 0.45A.
Any alarm/event can be programmed to any channel or channels. Up to four (4) events can be programmed to a
relay. If multiple events are grouped to one relay, any of the events becoming active will activate the channel. The
same alarm/event can be programmed to more than one channel. Up to two Programmable Relay Boards can be
installed in the Liebert NXL for a total of 16 channels. Programming is performed through the HMI touchscreen
display.
Figure 4 Control wiring, Programmable Relay Board
NOTE
Up to two PRB’s can be installed in a Liebert NXL.
Table 1 Programmable Relay Board pinout
Terminal
Block Channel Pin No. Common
Normally
Closed
Normally
Open
J71
CH1 1-3 1 2 3
CH2 4-6 4 5 6
CH3 7-9 7 8 9
CH4 10-12 10 11 12
J72
CH5 1-3 1 2 3
CH6 4-6 4 5 6
CH7 7-9 7 8 9
CH8 10-12 10 11 12
P99
J71
J72
P66
12345 7689101112
12345 7689101112

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Configuring the Programmable Relay Board Settings
1. Press Internal Option Settings from the Config menu.
2. Press which Programmable Relay Board will be configured. The Programmable Relay Board dialog box is displayed.
3. Press the Relay channel
4. Press up to four events. Selected events will show up under Relay 1 Assignment.
5. Repeat Steps 3 and 4for each relay.
6. Press SAVE to keep the settings.
Figure 5 Programmable relay board dialog box
• Assignment—0 to 4 event (default: 0)
• Delay, sec—0 to 99.9 (default: 0)
NOTE
To deselect an event, click on the event.

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2.2 Inter-Module Control Wiring
NOTE
Unless otherwise noted, use copper or aluminum conductors suitable for at least 75°C.
Table 2 Cable group #22A - from SIB breaker interface board (BIB) to SIB breaker
Terminal Designation
Signal Name
Maximum
LengthFrom To
TB1150-1
Remote Breaker
Contacts
SIB AUX CONTACT COMMON
#14-22AWG
500FT (150m)
TB1150-2 SIB AUX CONTACT, CLOSED = CB IS OPEN
TB1150-3 SIB AUX CONTACT, CLOSED = CB IS CLOSED
TB1150-4 SIB 48VDC TRIP COIL (-)
TB1150-5 SIB 48VDC TRIP COIL (+)
Table 3 Cable group #22B - from SIB breaker interface board (BIB) to breaker motor operator (optional)
Terminal Designation
Signal Name Maximum
Length
From To
TB1151-1 Remote Breaker
Motor Operator
Contacts
AC LINE #14-22AWG
500FT (150m)
TB1151-5 MOTOR OPERATOR CLOSE
Table 4 Cable group #23A - from tie breaker interface board (BIB) to tie breaker
Terminal Designation
Signal Name Maximum
Length
From To
TB1150-1
Remote Breaker
Contacts
TIE AUX CONTACT COMMON
#14-22AWG
500FT (150m)
TB1150-2 TIE AUX CONTACT, CLOSED = CB IS OPEN
TB1150-3 TIE AUX CONTACT, CLOSED = CB IS CLOSED
TB1150-4 TIE 48VDC TRIP COIL (-)
TB1150-5 TIE 48VDC TRIP COIL (+)
Table 5 Cable group #23B - from tie breaker interface board (BIB) to breaker motor operator (optional)
Terminal Designation
Signal Name Maximum
Length
From To
TB1151-1 Remote Breaker
Motor Operator
Contacts
AC LINE #14-22AWG
500FT (150m)
TB1151-5 MOTOR OPERATOR CLOSE
Table 6 Cable group #24A - from MBB breaker interface board (BIB) to MBB breaker
Terminal Designation
Signal Name Maximum
Length
From To
TB1150-1
Remote Breaker
Contacts
MBB AUX CONTACT COMMON
#14-22AWG
500FT (150m)
TB1150-2 MBB AUX CONTACT, CLOSED = CB IS OPEN
TB1150-3 MBB AUX CONTACT, CLOSED = CB IS CLOSED
TB1150-4 MBB 48VDC TRIP COIL (-)
TB1150-5 MBB 48VDC TRIP COIL (+)

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Table 7 Cable group #24B - from MBB breaker interface board (BIB) to breaker motor operator (optional)
Terminal Designation
Signal Name Maximum
Length
From To
TB1151-1 Remote Breaker Motor
Operator Contacts
AC LINE #14-22AWG
500FT (150m)
TB1151-5 MOTOR OPERATOR CLOSE
Table 8 Cable group #25A - from MIB breaker interface board (BIB) to MIB breaker
Terminal Designation
Signal Name Maximum
Length
From To
TB1150-1
Remote Breaker Contacts
MIB AUX CONTACT COMMON
#14-22AWG
500FT (150m)
TB1150-2 MIB AUX CONTACT, CLOSED = CB IS OPEN
TB1150-3 MIB AUX CONTACT, CLOSED = CB IS CLOSED
TB1150-4 MIB 48VDC TRIP COIL (-)
TB1150-5 MIB 48VDC TRIP COIL (+)
Table 9 Cable group #25B - from MIB breaker interface board (BIB) to breaker motor operator (optional)
Terminal Designation
Signal Name Maximum
Length
From To
TB1151-1 Remote Breaker Motor
Operator Contacts
AC LINE #14-22AWG
500FT (150m)
TB1151-5 MOTOR OPERATOR CLOSE
Table 10 Cable group #26A - from LBB breaker interface board (BIB) to LBB breaker
Terminal Designation
Signal Name Maximum
Length
From To
TB1150-1
Remote Breaker Contacts
LBB AUX CONTACT COMMON
#14-22AWG
500FT (150m)
TB1150-2 LBB AUX CONTACT, CLOSED = CB IS OPEN
TB1150-3 LBB AUX CONTACT, CLOSED = CB IS CLOSED
Table 11 Cable group #27A - parallel from SCC/UPS inter-module communication board to Liebert NXL Power-Tie
inter-module communication board
Terminal Designation
Signal Name Maximum
Length
From To
P3101-3 P3101-3 SYSTEM CAN +24V
#18AWG
1000FT (300m)
P3101-4 P3101-4 SYSTEM CAN COMMON
P3101-7 P3101-7 GROUND
P3101-14 P3101-14 GROUND
P3101-12 P3101-12 LBS SYNCH CAN +24V
P3101-13 P3101-13 LBS SYNCH CAN COMMON
Note: Must use Belden 8106 or (3) Belden 8102; outer shield drain wire must be connected to pins 7 and 14 at each connector.

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Table 12 Cable group #27B - redundant parallel from SCC/UPS inter-module communication board to Liebert NXL
Power-Tie inter-module communication board
Terminal Designation
Signal Name Maximum
Length
From To
P3103-3 P3103-3 REDUNDANT SYSTEM CAN +24V
#18AWG
1000FT (300m)
P3103-4 P3103-4 REDUNDANT SYSTEM CAN COMMON
P3103-7 P3103-7 GROUND
P3103-14 P3103-14 GROUND
P3103-12 P3103-12 REDUNDANT LBS SYNCH CAN +24V
P3103-13 P3103-13 REDUNDANT LBS SYNCH CAN COMMON
Note: Must use Belden 8106 or (3) Belden 8102; outer shield drain wire must be connected to pins 7 and 14 at each connector.
Table 13 Cable group #28A - parallel from Liebert NXL Power-Tie inter-module communication board to next Liebert NXL
Power-Tie inter-module communication board
Terminal Designation
Signal Name Maximum
Length
From To
P3101-1 P3101-1 SHARE CAN +24V
#18AWG
1000FT (300m)
P3101-2 P3101-2 SHARE CAN COMMON
P3101-7 P3101-7 GROUND
P3101-14 P3101-14 GROUND
P3101-8 P3101-8 PWM SYNCH CAN +24V
P3101-9 P3101-9 PWM SYNCH CAN COMMON
Note: Must use Belden 8106 or (3) Belden 8102; outer shield drain wire must be connected to pins 7 and 14 at each connector.
Table 14 Cable group #28B - redundant parallel Liebert NXL Power-Tie inter-module communication board to next Liebert
NXL Power-Tie inter-module communication board
Terminal Designation
Signal Name Maximum
Length
From To
P3103-3 P3103-3 SHARE CAN +24V
#18AWG
1000FT (300m)
P3103-4 P3103-4 SHARE CAN COMMON
P3103-7 P3103-7 GROUND
P3103-14 P3103-14 GROUND
P3103-12 P3103-12 PWM SYNCH CAN +24V
P3103-13 P3103-13 PWM SYNCH CAN COMMON
Note: Must use Belden 8106 or (3) Belden 8102; outer shield drain wire must be connected to pins 7 and 14 at each connector.
Table 15 Cable group #29A - from MBB breaker interface board to SKRU interface
Terminal Designation
Signal Name Maximum
Length
From To
TB1158-6
SKRU
CONTACTS
KEY STATUS SWITCH, CLOSED = KEY RELEASED
#14-22AWG
500FT (150m)
TB1158-4 KEY STATUS SWITCH, COMMON
TB1158-5 KEY STATUS SWITCH, CLOSED = KEY CAPTIVE
Table 16 Cable group #29B - from MBB breaker interface board to SKRU interface
Terminal Designation
Signal Name Maximum
Length
From To
TB1151-1 SKRU
CONTACTS
CLOSED = ENABLE SKRU #14-22AWG
164FT (50m)
TB1151-5 MAINTENANCE BYPASS CABINET, COMMON

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 10
Table 17 Cable group #32 - from Liebert NXL Power-Tie control terminal block to voltage and current sense points
Terminal Designation
Signal Name Maximum
Length
From To
TB7
VOLTAGE &
CURRENT SENSE
POINTS
Critical Load Bus, Phase A CT X1
22-12AWG/
500FT (150m)
TB8 Critical Load Bus, Phase A CT X2
TB9 Critical Load Bus, Phase B CT X1
TB10 Critical Load Bus, Phase B CT X2
TB11 Critical Load Bus, Phase C CT X1
TB12 Critical Load Bus, Phase C CT X2
TB13 UPS SOURCE, Phase A CT X1
TB14 UPS SOURCE, Phase A CT X2
TB15 UPS SOURCE, Phase B CT X1
TB16 UPS SOURCE, Phase B CT X2
TB17 UPS SOURCE, Phase C CT X1
TB18 UPS SOURCE, Phase C CT X2
TB19 TIE BUS VOLTAGE, PHASE A
TB20 TIE BUS VOLTAGE, PHASE B
TB21 TIE BUS VOLTAGE, PHASE C
TB22 NEUTRAL
TB23 CRITICAL LOAD BUS VOLTAGE, PHASE A
TB24 CRITICAL LOAD BUS VOLTAGE, PHASE B
TB25 CRITICAL LOAD BUS VOLTAGE, PHASE C
TB26 NEUTRAL
TB27 BYPASS SOURCE VOLTAGE, PHASE A
TB28 BYPASS SOURCE VOLTAGE, PHASE B
TB29 BYPASS SOURCE VOLTAGE, PHASE C
TB30 NEUTRAL
TB31 FUTURE
TB32 FUTURE
TB33 FUTURE
TB34 FUTURE
TB35 UPS SOURCE VOLTAGE, PHASE A
TB36 UPS SOURCE VOLTAGE, PHASE B
TB37 UPS SOURCE VOLTAGE, PHASE C
TB38 NEUTRAL
F1 UPS Source Power Supply, Phase A
F2 UPS Source Power Supply, Phase B
F3 Bypass Source Power Supply, Phase A
F4 Bypass Source Power Supply, Phase B
F5 Optional Power Supply
F6 Optional Power Supply

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 11
3.0 INSTALLATION DRAWINGS
Figure 6 Control wiring layout for Liebert NXL Power-Tie
Power Tie 1
Controls
Power Tie 2
Controls
System #1
CG # 22
CG # 23
CG # 26
CG # 27
CG # 24
CG # 25
CG # 29
System #2
CG # 22
CG # 23
CG # 26
CG # 27
CG # 24
CG # 25
CG # 29
CG
#28
Power Tie 3
Controls System #3
CG # 22
CG # 23
CG # 26
CG # 27
CG # 24
CG # 25
CG # 29
CG#28
CG #1REPO
CG # 32
CG # 32
CG # 32

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 12
Figure 7 Liebert NXL Power-Tie System #1 layout
539652
Page 1, Rev. 3
Breaker Interface
Board (SIB)
Breaker Interface
Board (Tie)
Breaker Interface
Board (MBB, Optional)
Breaker Interface
Board (MIB, Optional)
Breaker Interface
Board (LBB, Optional)
Voltage and
Current Sensor
Terminal Blocks
High
Voltage
(External)
High Voltage
(External)
High Voltage
(External)
To Associated
SM/MM System
To Associated
SM/MM System
To Associated
SM/MM System
Low Voltage
(External)
Low Voltage
(External)
External
Interface
Board
(EIB
Option Box
Liebert
Intellislot
Ports
TOP VIEW BOTTOM VIEW
FRONT VIEW

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 13
Figure 8 Liebert NXL Power-Tie System #2 or #3 layout
539652
Pg. 02, Rev. 03
Breaker Interface
Board (SIB)
Breaker Interface
Board (Tie)
Breaker Interface
Board (MBB, Optional)
Breaker Interface
Board (MIB, Optional)
Breaker Interface
Board (LBB, Optional)
Voltage and
Current Sensor
Terminal Blocks
High
Voltage
(External)
High Voltage
(External)
High Voltage
(External) To Associated
SM/MM System
To Associated
SM/MM System
To Associated
SM/MM System
Low Voltage
(External)
Low Voltage
(External)
TOP VIEW BOTTOM VIEW
FRONT VIEW
Option Box

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 14
Figure 9 Liebert NXL Power-Tie control wiring for single system
ST
48VDC
SIB
SY STE M IS OL A TIO N
B R EA KE R
CL O S E
COIL
120VAC
CLO SE
SHUNT TRIP SHUNT TRIP
ST
48VDC
MBB
MAINTENANCE ISOLATION
B R EA KE R
CL O S E
COIL
120VAC
CLO SE
SHUNT TRIP SHUNT TRIP
ST
48VDC
MAINTENANCE BYPASS
B R EA KE R
CL O S E
COIL
120VAC
CLO SE
SHUNT TRIP SHUNT TRIP
ST
48VDC
TIE
TIE BREAKER
CLOSE
COIL
120VAC
CLOSE
SHUNT TRIP SHUNT TRIP
ST
48VDC
LBB
LOAD BANK BREAKER
CLOSE
COIL
120VAC
CLOSE
SHUNT TRIP SHUNT TRIP
BYPASS SOURCE, ΦA BYPASS SOURCE, ΦB BYPASS SOURCE, ΦC
NEUTRAL
UPS SOURCE, ΦA UPS SOURCE, ΦB UPS SOURCE, ΦC
NEUTRAL
LOAD BANK, ΦA LOAD BANK, ΦB LOAD BANK, ΦC NEUTRAL TIE BUS, ΦA TIE BUS, ΦB TIE BUS, ΦC NEUTRAL CRITICAL LOAD BUS, ΦA CRITICAL LOAD BUS, ΦB CRITICAL LOAD BUS, ΦC NEUTRAL
Critical Load Bus Voltage, Phase A
Cr itica l Lo ad Bu s, Ph as e A CT X1
UPS Source, Phase A CT X1 UPS Source Voltage, Phase A
Bypass Source Voltage, Phase A
TIE Bus Voltage, Phase A
UPS Source Power Supply, Phase A UPS Source Power Supply, Phase B
NEUTRAL
ST AT US C O M 1
STATUS OPEN 1
STATUS CLOSED 1
STA TUS COM 1
STA T U S OP EN 1
STATU S CLOSED 1
ST AT US C O M 1
STATUS OPEN 1
STATUS CLOSED 1
ST AT US C O M 1
STATUS OPEN 1
STATUS CLOSED 1
STA TUS COM 1
STA T U S OP EN 1
STATU S CLOSED 1
To SIB Breaker Interface Board
To M IB Br e ake r
In t e rf a ce Bo ar d
To M B B Br e ake r
In t e rf a ce Bo ar d
To Tie Br ea ke r
In te rf ace B o ard
Cr itica l Lo ad Bu s, Ph as e A CT X2 Cr itica l Lo ad Bu s, Ph as e B CT X1 Cr itica l Lo ad Bu s, Ph as e B CT X2 Critical Load Bus, Phase C CT X1 Critical Load Bus, Phase C CT X2
Critical Load Bus Voltage, Phase B Critical Load Bus Voltage, Phase C
TIE Bus Voltage, Phase B TIE Bus Voltage, Phase C
Bypass Source Voltage, Phase B Bypass Source Voltage, Phase C
Bypass Source Power Supply, Phase A Bypass Source Power Supply, Phase B
UPS Source, Phase A CT X2 UPS Source, Phase B CT X1 UPS Source, Phase B CT X2 U P S S o ur c e, P h as e C CT X 1 U P S S o ur c e, P h as e C CT X 2
UPS Source Voltage, Phase B
UPS Source Voltage, Phase C
1. Star Power Tie configuration shown. 2. Motor operator and shunt trip
connections shown for all circuit breakers, although M IB, MBB and LBB may be manually operated types in some systems.
MIB

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 15
4.0 SPECIFICATIONS
Table 18 Liebert NXL Power-Tie Control specifications
Environmental Parameters
Storage Temperature
Range, °F (°C) -13 to 158 (-25 to 70)
Operating Temperature
Range, °F (°C) 32 to 104 (0 to 40) (UPS)
Relative Humidity 95% or less Non-Condensing
(Operating and Non-Operating)
Maximum Altitude Above
mean sea level, ft (m)
4920 (1500) (as per IEC 62040/3) - 1% Max kW
derate / 328 rise between 4921-9842
(100m rise between 1500-3000m)

Vertiv™|Liebert®NXL™Power-Tie Controls | Rev. 6 | 06/2017 16
NOTES