Vertiv Liebert NXL SCCi User manual

Liebert®
NXL™ System Control Cabinet, SCCi
Installation Manual — 1600A-5000A, 60Hz, Three-Phase

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If you encounter any installation or operational issues with your product, check the pertinent
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The information contained in this document is subject to change
without notice and may not be suitable for all applications. While
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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.
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manufacturer.

i
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.0 MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Bypass Backfeed Breaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Neutral Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Static Switch Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.0 CONTROL CABLE CONNECTIONS AND COMMUNICATION . . . . . . . . . . . . 7
2.1 Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Multi-Module Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Remote Input Breaker (RIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Inverter Output Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Digital LBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.6 Input Contact Isolator Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.7 Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.7.1 Configuring the Programmable Relay Board Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FIGURES
Figure 1 Static switch installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2 Static switch installation, steps 1 through 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3 Static switch installation, steps 4 through 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4 External Interface Board connections layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Inter-Module Communication Board wiring diagram—Multi-modules . . . . . . . . . . . . . . 10
Figure 6 Remote Input Breaker diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7 Remote Output Breaker diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8 Inter-Module Communication Board wiring diagram—Digital LBS. . . . . . . . . . . . . . . . . . 13
Figure 9 Input contact isolator dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10 Optional Input Contact Isolator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11 Control wiring, Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12 Programmable relay board dialog box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 13 Control wiring layout for Liebert NXL SCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14 Main Components, Liebert NXL SCC Ebox. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

ii
TABLES
Table 1 SCC input dry contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 2 SCC control contacts with maintenance bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3 SCC control contacts to remote alarm status panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4 Parallel from SCC module Inter-Module Communication Board to other Inter-Module
Communication Board in system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5 RIB UV coil, aux. contacts from SCC RIB CB interface board to remote CB1. . . . . . . . . 11
Table 6 Remote IOB contacts from remote breaker to SCC IOB CB interface board . . . . . . . . . 12
Table 7 Wire size, length for digital LBS connection of SCC Inter-Module Communication
Boards13
Table 8 Input Contact Isolator Board pre-assigned values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 9 Input Contact Isolator Board control wiring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 10 Programmable Relay Board pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11 Liebert NXL SCCi Bypass Static Switch and Ebox specifications . . . . . . . . . . . . . . . . . . .20
Table 12 UPS current ratings—rectifier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 13 UPS current ratings—output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NXL™SCCi Bypass Static Switch and Ebox. 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.
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, SL-25414, before as well as during performance of all maintenance
procedures.
AVERTISSEMENT
Risque de décharge électrique pouvant causer des blessures graves, voire mortelles.
Seuls des employés qualifiés et dûment formés portant un casque, des gants, des
chaussures et des lunettes de sécurité adéquats doivent se charger d’installer le système
ASC ou de le préparer pour l’installation. Les responsables de l’entretien et l’équipement
d’essai doivent reposer sur des tapis de caoutchouc lors de toute intervention sur une
pièce d’équipement sous tension.
En cas d’incendie associé à du matériel électrique, n’utilisez que des extincteurs à dioxyde
de carbone ou homologués pour la lutte contre les incendies d’origine électrique.
Les opérations d’installation et d’entretien requièrent une extrême prudence.
Des précautions de sécurité spéciales sont requises pour les procédures associées à la
manutention, à l’installation et à l’entretien du système ASC. Observez toutes les
précautions de sécurité décrites dans le présent manuel avant de manipuler ou d’installer
le système ASC. Observez également toutes les précautions décrites dans le manuel
d’utilisation et d’entretien, SL-25414, avant et pendant toutes les procédures d’entretien.
Observez toutes les précautions de sécurité appropriées lorsque vous travaillez sur à
proximité d’une source c.c.

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 2
WARNING
Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or
death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury
to personnel. The Bypass Static Switch module’s weight is approximately 1000lb (455kg).
Locate center of gravity symbols and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.
Read all of the following instructions before attempting to move, lift, or remove packaging
from unit, or prepare unit for installation.
AVERTISSEMENT
Le centre de gravité élevé de l’appareil présente un risque de renversement. Une mauvaise
manutention peut entraîner des dommages matériels, des blessures et même la mort.
Faites preuve d’une extrême prudence lors de la manutention des armoires ASC afin d’éviter
de les endommager ou de blesser le personnel. Le module ASC pèse jusqu’à 3 455 kg
(1 000 lb).
Identifiez les symboles de centre de gravité et déterminez le poids de l’appareil avant
de
manipuler chaque armoire. Testez le levage et l’équilibre des armoires avant de transporter
l’appareil. Maintenez en tout temps l'inclinaison verticale minimale.
Les fentes situées à la base des armoires du module sont conçues pour utiliser le chariot
élévateur. Les fentes situées à la base peuvent soutenir le système seulement si les
fourches se trouvent complètement sous le système.
Lisez toutes les instructions ci-dessous avant de tenter de déplacer, lever, déballer ou
préparer le système en vue de son installation.
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.

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 3
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.
AVERTISSEMENT
Risque de décharge électrique et d’incendie. pouvant entraîner des dommages matériels,
des blessures et même la mort.
Les précautions de sécurité habituelles suffisent lorsque le système ASC est en mode de
fonctionnement normal et que toutes les portes sont fermées. La zone entourant le
système ASC doit être exempte de flaques d’eau, d’humidité excessive et de débris.
Seuls des équipements d’essai conçus pour le dépannage doivent être utilisés. Cette mise
en garde couvre notamment les oscilloscopes. Utilisez toujours un voltmètre c.a. et c.c.
pour vérifier les tensions avant d’établir un contact ou d’utiliser des appareils. Des tensions
dangereusement élevées peuvent demeurer dans les batteries de condensateurs et au
niveau des raccords c.c., même une fois l’alimentation coupée.
Tous les raccords doivent être effectués par un électricien dûment formé et qualifié. Tous
les câbles d’alimentation et de commande doivent être conformes aux codes nationaux et
locaux en vigueur.
Une personne ne devrait jamais travailler seule, même si toute l’alimentation d’entrée est
coupée. Une deuxième personne devrait toujours être présente pour porter assistance ou
chercher de l’aide en cas d’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™System Control Cabinet™Installation Manual | 4
1.0 MECHANICAL INSTALLATION
1.1 Introduction
The Liebert NXL’s SCCi switchgear cabinet can be used to interconnect multiple Liebert NXL
UPS units into a single power system. The system of Liebert NXL modules provides continuous,
high-quality AC power to your business-critical equipment, such as telecommunications and
data processing equipment.
The Liebert NXL UPS 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 SCCi will permit the user to switch the entire system into maintenance bypass
simultaneously for maintenance or repair without interruption in service.
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 SCCi, please carry out the following preliminary checks:
• Examine the Liebert NXL SCCi 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 SCCi 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.
1.3 Bypass Backfeed Breaker
For systems using the 4000A or 5000A 480V static switch at 150kAIC, the Bypass Backfeed
Breaker (BFB) must be Listed UL 489 (Molded Case Circuit Breaker) or UL 1066 (Low Voltage AC
Power Circuit Breaker) that is required to be used in UL-listed switchgear or switchboards. The
circuit breaker must have a short-time rating not exceeding 480V at 150,000 amperes, for five
cycles.
1.4 Neutral Connections
All UPS output neutrals in a Liebert NXL system must be tied together. This keeps any
unbalanced currents or circulating currents off the ground path. If the system is a 3-wire system,
Vertiv recommends putting the neutral-ground bond at this tie point.

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 5
1.5 Static Switch Installation
The static switch is heavy (975lb. [442kg]) and could fall if it is not properly supported when it is
extended. Do not attempt to rack out static switch before all hardware is installed as instructed in
the steps below.
When the front support plate is removed the static switch is free to roll onto the static switch
support table. The support table must be leveled before the static switch is racked out of the
cabinet.
Ensure that no one gets under the static switch for any reason when it is racked out of the
cabinet and supported by the static switch table support. Refer to Figure 1 and to the following
steps to install the static switch.
Figure 1 Static switch installation
1. Remove the static switch support table kit from under the static switch.
2. Attach the support channel to the left and right sides using the hardware shown in Detail C in Figure 2.
3. Attach the front brace to the left and right sides with the hardware shown in Detail H in Figure 2.
WARNING
Risk of heavy object falling suddenly. Can cause equipment damage, personal injury or
death.
AVERTISSEMENT
Le centre de gravité élevé de l’appareil présente un risque de renversement. Une mauvaise
manutention peut entraîner des dommages matériels, des blessures et même la mort.
Detail Area C
Detail Area B
Detail Area D
Detail Area E
2286.0
[90.00]
1080.6
[42.54]
697.4
[27.46]
978.3
[38.51]
1080.6
[42.54]
697.4
[27.46]
1016.0
[40.00]
Isometric View

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 6
Figure 2 Static switch installation, steps 1 through 3
4. Attach the support angles to the front brace and sides using the hardware shown in Detail G in Figure 3.
5. Before installing static switch table support to the substructure, install the static switch table support
legs using the hardware as shown in Detail A in Figure 3.
6. Attach horizontal brace using hardware as shown in Detail F in Figure 3.
7. Pull out the substructure slides and attach the static switch table support to substructure slides using
hardware as shown in Detail B in Figure 3.
8. Level the static switch table support to the floor using the foot levelers attached to each static switch
table support leg. ensure that a minimum of (2) full threads are showing past the hexsert when leveling
the static switch support table in Detail C in Figure 3.
9. Remove the hardware from side slide stopping brackets as shown in Detail D in Figure 3.
10. Remove only the hardware that attaches the front support plate to the substructure. Leave the support
plate and associated hardware attached to the static switch as shown in Detail E in Figure 3. The static
switch can be moved forward after removal of the side slide stopping brackets and front support plate.
11. Rack out the static switch. After the static switch has been disengaged, move it forward to the front of the
static switch table support.
Install the static switch table
support legs before attaching
the static switch table support
to the substructure
Horizontal
Brace
Front
Brace
Support Channel
Right
Side
Left
Side
Detail A
Detail F
Detail C
Detail G
Detail
H
15 x 4
16 x 4
17 x 4
Detail C
15 x 8
16 x 8
17 x 8
Four each side
Detail H
Step 2
Step 3

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 7
Figure 3 Static switch installation, steps 4 through 10
11
x 4
12
x 4
12
x 4 14
x 4
13
x 4
Detail F
Detail G
15 x 8
16 x 8
17 x 8
14 x 2
13 x 2
12 x 2
12 x 2
11 x 2
Static Switch Table
Support Leg
Detail A
11
x 4
12
x 4
12
x 4
13
x 4
14
x 4
Detail B
Foot
Leveler
Hexsert
Detail C
Side Slide Stopping
Bracket
Detail D
Do not remove the top
three sets of hardware
from the front support
plate to static switch
Front
Support
Plate
Once front support plate
is removed, the static
switch is free to roll
onto the static switch
support table.
Detail E
Step 5
Step 4 Step 6
Step 7 Step 8 Step 9 Step 10

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 8
2.0 CONTROL CABLE CONNECTIONS AND
COMMUNICATION
Based on your site’s specific needs, the SCC may require auxiliary connections to communicate
with a personal computer, provide alarm signaling to external devices or for Remote Emergency
Power Off (REPO). The External Interface Board, arranged for this purpose, is next to the option
box in the Rectifier section (refer to 3.0 - Installation Drawings).
Figure 4 External Interface Board connections layout
NOTE
Unless otherwise noted, use copper or aluminum conductors suitable for at least 75°C.
P66C P99C
TB0823
EPO
STATUS
TB0829
EXTERNA L
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
EXTERNA L
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

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 9
2.1 Dry Contacts
NOTE
If connection to more than one module is required, use a separate contact for each module.
Table 1 SCC input dry contacts
Item
Termina
l
Block Pin
Connects to
(Description of External Item)
Wire Size/
Maximum
Length
Remote EPO
Input Form
C
TB0824
1 REPO Switch, normally open contact
14AWG/
500ft.
(150m)
2 REPO Switch, common contact
3
REPO Switch, normally closed contact, set
jumper
J5: 1-2 to enable, 2-3 to disable
On
Generator
Input Form
C
TB0816
1 On Generator switch, closed = On Generator
2 On Generator switch, common
3On Generator switch, closed = Not On
Generator
Table 2 SCC control contacts with maintenance bypass
Item
Termin
al
Block
Pi
n
Connects to
(Description of External Item)
Wire Size/
Maximum
Length
Maintenance
Isolation Breaker
(MIB) Form C
TB0811
1CB aux. contact, closed = CB is
closed
14AWG/500ft.
(150m)
2 CB aux. contact, common
3CB aux. contact, closed = CB is
open
Maintenance Bypass
Breaker (MBB) Form C TB0813
1CB aux. contact, closed = CB is
closed
14AWG/500ft.
(150m)
2 CB aux. contact, common
3CB aux. contact, closed = CB is
open
Maintenance Bypass
Enable Form C TB0821
1Maintenance Bypass Cabinet,
closed = load on inverter
14AWG/500ft.
(150m)
2Maintenance Bypass Cabinet,
common
3Maintenance Bypass Cabinet,
closed = load not on inverter
Remote EPO Input TB0825 1REPO Switch, normally open
contact 14AWG/500ft.
(150m)
2 REPO Switch, common contact
Key Status Input Form C 1TB082
0
1Key status switch, closed = key
removed
14AWG/500ft.
(150m)
2 Key status switch, common
3Key status switch, closed = key
inserted

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 10
2.2 Multi-Module Communication
Paralleling cables that connect the module to the system are connected to terminals P3101 and
P3103 on the Inter-Module Communication (IMC) board (refer to 3.0 - Installation Drawings).
Module Output Breaker
(MIB) Form C TB0815
1CB aux. contact, closed = CB is
closed
14AWG/500ft.
(150m)
2 CB aux. contact, common
3CB aux. contact, closed = CB is
open
Rectifier Input Breaker (RIB)
Form C TB0810
1CB aux. contact, closed = CB is
closed
14AWG/500ft.
(150m)
2 CB aux. contact, common
3CB aux. contact, closed = CB is
open
Bypass Input Breaker
(BIB) Form C TB0812
1CB aux. contact, closed = CB is
closed
14AWG/500ft.
(150m)
2 CB aux. contact, common
3CB or Switch aux. contact,
closed = CB or switch is open
1. Key Status Input can be either Form-C, N.O. or N.C. contact.
Table 3 SCC control contacts to remote alarm status panel
Item
Terminal
Block Pin
Connects to
(Description of External Item)
Wire Size/
Maximum Length
24VDC
TB0829
1TB-1
18AWG/1000ft.
(300m)
24V Rtn 2 TB-2
CAN-H 3 TB-4
CAN-L 4 TB-5
Table 4 Parallel from SCC module Inter-Module Communication Board to other Inter-Module
Communication Board in system
Terminal Designation
Signal Name
Wire Size/ Maximum
LengthFrom To
Primary Connections
Table 2 SCC control contacts with maintenance bypass
Item
Termin
al
Block
Pi
n
Connects to
(Description of External Item)
Wire Size/
Maximum
Length

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 11
P3101-1 P3101-1 Share CAN +24V
#24AWG/
1000ft.
(300m)
P3101-2 P3101-2 Share CAN common
P3101-3 P3101-3 System CAN +24V
P3101-4 P3101-4 System CAN common
P3101-5 P3101-5 SER synch CAN+24V
P3101-6 P3101-6 SER synch 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
P3101-10 P3101-
10 MMS synch CAN +24V
P3101-11 P3101-
11 MMS synch CAN common
Redundant Connections
P3103-1 P3103-1 Redundant share CAN +24V
#24AWG/
1000ft.
(300m)
P3103-2 P3103-
2Redundant share CAN common
P3103-3 P3103-
3Redundant system CAN +24V
P3103-4 P3103-
4
Redundant system CAN
common
P3103-5 P3103-
5
Redundant SER synch CAN
+24V
P3103-6 P3103-
6
Redundant SER synch CAN
common
P3103-7 P3103-7 Ground
P3103-14 P3103-
14 Ground
P3103-8 P3103-
8
Redundant PWM synch CAN
+24V
P3103-9 P3103-
9
Redundant PWM synch CAN
common
P3103-10 P3103-
10
Redundant MMS synch CAN
+24V
P3103-11 P3103-
11
Redundant MMS synch CAN
common
1. Belden 810x or Belden 89901 cables are the only approved cables.
2. Belden 89901 cable can be used for underground installations.
3. If using multiple parallel cables for each run, all cables must be run in the same conduit.
4. Each cable group should be run in a separate grounded conduit to ensure redundancy.
5. The maximum lengths must include all the parallel cables from the first module to the last module. The primary and redundant cable
lengths can be counted separately.
6. The ground pins on the Inter-Module Communication Board (Pins 7 and 14) are connected together on the board. If using cable with
only one (1) drain wire, then connect the ground (drain wire) to Pin 7.
7. Care must be taken so drain wire does not touch any other component in module.
8. Attach control wires to side of control door where Inter-Module Board (IMC) is attached. Do not run wires across IMC board.
Table 4 Parallel from SCC module Inter-Module Communication Board to other Inter-Module
Communication Board in system
Terminal Designation
Signal Name
Wire Size/ Maximum
LengthFrom To

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 12
Figure 5 Inter-Module Communication Board wiring diagram—Multi-modules
2.3 Remote Input Breaker (RIB)
For systems that use Remote Input Breakers (RIB), the controls for the Aux contacts, UVR, Motor
Operator (optional) and voltage sense will go between the Remote breaker and the SCC Input I/O
section. See Figure 6.
UPS 1 UPS 2
UPS 3
P3103
P3101
P3103
P3101
P3103
P3101
IMC
02-806730-xx IMC
02-806730-xx
IMC
02-806730-xx

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 13
Figure 6 Remote Input Breaker diagram
The RIB must be Listed UL 489 (Molded Case Circuit Breaker) or UL 1066 (Low Voltage AC
Power Circuit Breaker) that are required to be used in UL-listed switchgear or switchboards. The
circuit breaker must have a short-time rating not exceeding 480 volts at 150K amperes, for 5
cycles.
See Table 12 for required current ratings.
Table 5 RIB UV coil, aux. contacts from SCC RIB CB interface board to remote CB1
Terminal Designation
Signal Name
Wire Size/
Maximum
LengthFrom To
Remote Breaker
Contacts
TB1101-1 RIB aux. common
#14AWG/
500ft. (150m)
TB1101-2 RIB aux. N.C. (closed = CB is open)
TB1101-3 RIB aux. N.O. (closed = CB is closed)
TB1101-4 RIB trip coil (-)
TB1101-5 RIB trip coil (+)
A
B
C
E
RIB
10A 10A 10A
IN_LINE_A
IN_LINE_B
IN_LINE_C
INPUT EMI
FILTER
IN_LOAD_A
IN_LOAD_B
IN_LOAD_C
A
B
C
A
B
C
LINE LOAD
V_IN_R_A
V_IN_R_B
V_IN_R_C
4 C B1_ COIL _R TN
3_CB1_NO ( CB CLOSED )
2_CB1_NC ( CB OPEN )
5 C B1_ CO IL
1_CB1_COM
Inside UPS Cabinet
RIB
UVR Coil
(48VDC)
RIB Status
Contacts
120-240VAC
Close
RIB
RCB1
Electr ical
Oper ator
120-240VAC
(supplied by
swichgear vendor)
5_ M TR_ OP_ C LOSE
2_ M TR_ OP_ ENABLE
Circuit Breaker
Interface Board
02-806711-01
Inside Switchgear
To Customer
Input
Terminals
12 12 12
RIB-1
1
1
Fuses should be 10A class CC or J type time delay
fuse
2
Electrical operator power provided by switchgear
vendor and shall be powered from line side of RIB
TB1
TB1-1
TB1-2
TB1-3
2
TB1101
TB1102

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 14
2.4 Inverter Output Breaker
For systems that use Inverter Output Breakers (IOB), the controls for the Aux contacts, UVR,
Motor Operator (optional) and voltage sense will go between the Remote breaker and the SCC
Output I/O section. See Figure 7.
IOB must be Listed UL 489 (Molded Case Circuit Breaker) or UL 1066 (Low Voltage AC Power
Circuit Breaker) that are required to be used in UL-listed switchgear or switchboards. The circuit
breaker must have a short-time rating not exceeding 480 volts at 150K amperes, for 5 cycles.
Remote RIB motor operator control contacts from remote breaker to SCC RIB CB interface
board (optional)
Remote Breaker Motor
Operator Contacts
TB1102-2 AC line #14AWG/
500ft. (150m)
TB1102-5 Motor operator close
Remote RIB voltage sense from remote breaker to SCC
Remote Breaker
Voltage Sense
TB1-1 Voltage sense PH A
#14AWG/
500ft. (150m)
TB1-2 Voltage sense PH B
TB1-3 Voltage sense PH C
Table 5 RIB UV coil, aux. contacts from SCC RIB CB interface board to remote CB1
Terminal Designation
Signal Name
Wire Size/
Maximum
LengthFrom To

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 15
Figure 7 Remote Output Breaker diagram
See Table 13 for required current ratings.
Table 6 Remote IOB contacts from remote breaker to SCC IOB CB interface board
Terminal Designation
Signal Name
Wire Size/ Maximum
LengthFrom To
Remote Breaker Contacts
TB1101-
1IOB aux. common
#14AWG/
500ft. (300m)
TB1101-
2
IOB aux. N.C. (closed = CB is
open)
TB1101-
3
IOB aux. N.O. (closed = CB is
closed)
TB1101-
4IOB trip coil (-)
TB1101-
5IOB trip coil (+)
Remote IOB contacts from remote breaker to SCC IOB CB interface board
A
B
C
E
IOB
5A 5A 5A
OUT_LINE_A
OUT_LINE_B
OUT_LINE_C
OUTPUT EMI
FILTER
OUT_LOAD_A
OUT_LOAD_B
OUT_LOAD_C
A
B
C
A
B
C
LINE LOAD
V_CB_A
V_CB_B
V_CB_C
TB1101
TB1102
4 CB1_COIL_RTN
3 _CB1 _N O (CB C LOSED )
2 _CB1 _N C ( CB OPEN )
5 CB1_COIL
1_CB1_COM
Inside UPS Cabinet
IOB UVR
Coil
(48 VD C )
Circuit Breaker Interface
Board
02-806711 -01
Inside Switchgear
To UPS
Output Customer
Connections
12 12 12
IOB-1
N
1
1
Fuses should be5A class CC or J type time delay
fuse
OUT_LOAD_N
OUT_LINE_N
N
2Electrical operator power provided by switchgear
vendor and shall be powered from UPS side of IOB
N
120 -240 Vac
Close
IOB-x
IOB
El ectr ical
Operator
120 - 240 Vac
(supplied by
sw itchgear vendor )
5_MTR_OP_CLOSE
2_MTR_OP_ENABLE
TB2
TB2-1
TB2-2
TB2-3
TB2-4
2
IOB Status
Contacts

Vertiv | Liebert®NXL™System Control Cabinet™Installation Manual | 16
2.5 Digital LBS
The Load Bus Sync interface enables independent SCC units to remain in sync when operating
on battery or when supplied by unsynchronized input sources.
Digital LBS cables that connect the module to the system are connected to terminals P3108 and
P3109 on the Inter-Module Communication (IMC) board. See Figure 8.
Figure 8 Inter-Module Communication Board wiring diagram—Digital LBS
Remote Breaker Motor
Operator Contacts
TB1102
-2 AC line #14AWG/
500ft. (300m)
TB1102
-5 Motor operator close
Remote IOB contacts from remote breaker to SCC IOB CB interface board
Remote Breaker Voltage
Sense
TB1-1 Voltage sense PH A #14AWG/
500ft. (300m)
TB1-2 Voltage sense PH B
TB1-3 Voltage sense PH C
Table 7 Wire size, length for digital LBS connection of SCC Inter-Module Communication Boards
Terminal Designation
Signal Name
Wire Size/
Maximum LengthFrom To
Digital LBS from SCC Inter-Module Communication Board to other SCC Inter-Module
Communication Board
P3108-1 P3108-1 LBS SYNCH CANH
#24AWG/3000ft
(900m)
P3108-2 P3108-2 LBS SYNCH CANL
P3108-3 P3108-3 GROUND
Redundant Digital LBS from SCC Inter-Module Communication Board to Other SCC
Inter-Module Communication Board
P3109-1 P3109-1 REDUNDANT LBS SYNCH CANH
#24AWG/3000ft
(900m)
P3109-2 P3109-2 REDUNDANT LBS SYNCH CANL
P3109-3 P3109-3 GROUND
1. Belden 810x or Belden 89901 cables are the only approved cables
2. Each cable group should be run in a separate, grounded conduit to ensure redundancy.
3. The maximum lengths must include all the LBS cables from the first module to the last module.
4. The primary and redundant cable lengths can be counted separately.
5. Belden 89901 cable can be used for underground installations.
6. Attach the control wire to the side of control door where the Inter-Module Board (IMC) is attached.
Do not run the wire across IMC board.
Table 6 Remote IOB contacts from remote breaker to SCC IOB CB interface board
Terminal Designation
Signal Name
Wire Size/ Maximum
LengthFrom To
SCC 1 SCC 2 SCC 3
P3108
P3109
P3108
P3109
P3108
P3109
IMC
02-806730-xx IMC
02-806730-xx
IMC
02-806730-xx