AC Power Systems for
Business Critical Continuity
Load Bus Sync™ Extender/Adapter for Dual Bus UPS
Installation Manual
120V-277VAC, 45-65Hz
TABLE OF CONTENTS
1.0 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.1 Liebert NX UPS to Liebert NX UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Liebert NX UPS to Non-Liebert NX UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FIGURES
Figure 1 LBS Adapter dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2 Horizontal installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3 Vertical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 4 Connecting a Liebert NX to a Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 5 Connecting a Liebert NX to a non-NX UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TABLES
Table 1 Human interface—indicators and switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2 Electrical rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 3 Part number description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
i
ii
1.0 GENERAL
Liebert’s Load Bus Sync (LBS) Extender/Adapter for Dual Bus UPS is designed to extend the LBS
function, up to 150m (492 ft.) between Liebert NX series uninterruptible power system (UPS) modules
of a dual bus system (DBS). The adapter also enables a Liebert NX UPS to synchronize with other
UPS models.
Figure 1 LBS Adapter dimensions
General
8.5”
(216.2mm)
DY3-4ZPW
POWER ON
LED1
COM2
COM1
Figure 2 Horizontal installation
DY3-4ZPW
POWER ON
LED1
Figure 3 Vertical installation
SWITCH
1.8”
(45.5mm)
COM2
COM1
SWITCH
5.25”
(133.5mm)
1
2.0 INSTALLATION
2.1 Liebert NX UPS to Liebert NX UPS
WARNING
!
Installation by qualified electrical personnel only—hazardous voltage may be present at the
UPS output connectors.
1. Connect the power cables of the adapter to the Phase A, Neutral and Ground output of each UPS.
2. Connect the LBS cable to COM1 of each LBS Signal Adapter.
3. Connect the other end of each LBS cable to X4 on the parallel board (UHW241M3) in the
NX UPS.
4. Connect the communication cable (up to 492 ft. [150m]) to the COM2 interface of each LBS Signal
Adapter.
5. The switch of both LBS signal adapters should be in the right position (see Figure 4).
Figure 4 Connecting a Liebert NX to a Liebert NX
Installation
Power ON
LED1
Power Cable
Connect to NX UPS
COM1 COM1COM2 COM2SWITCH SWITCHPower ON
LED1
Power Cable
LBS
Cable
Connect to NX UPS
Communication Cable
up to 492 ft. (150m)
LBS
Cable
2
2.2 Liebert NX UPS to Non-Liebert NX UPS
WARNING
!
Installation by qualified electrical personnel only—hazardous voltage may be present at the
UPS output connectors.
1. Connect the power cables of the adapter to the Phase A, Neutral and Ground Output of each UPS.
2. Connect the LBS cable to COM1 of the LBS Signal Adapter connected to the Liebert NX.
3. Connect the other end of the LBS cable to X4 on the parallel board (UHW241M3) in the NX UPS.
4. Connect the communication cable (up to 492 ft. [150m]) to the COM2 interface of each LBS Signal
Adapter.
5. The switches of LBS signal adapters connected to the Liebert NX should be in the right position
and the switches of LBS signal adapters connected to the non-NX UPS should be in the left
position (see Figure 5).
Figure 5 Connecting a Liebert NX to a non-NX UPS
Installation
LED1
Power Cable
Connect to NX UPS
Table 1 Human interface—indicators and switches
Item Description
Power port Connect to Phase A, Neutral and Ground of output of UPS.
LED1 (red) Power LED. It illuminates when the power is on, turns off when the power fails.
COM1
COM2
SWITCH
COM1 COM2 SWITCH COM1 COM2 SWITCHPower ON
Power Cable
Connect to non-NX UPS
LBS
Cable
Communication Cable
up to 492 ft. (150m)
LBS Signal interface.
Connect to NX series UPS unit.
RS485 interface.
Connect to other Signal Adapter.
Green LED: Communication Power is OK.
Yellow LED: Adapter is connected to Non NX series UPS.
Switch to left: Connect to Non-NX series UPS unit.
Switch to right: Connect to NX series UPS unit.
Power ON
LED1
Table 2 Electrical rating
Description Rating
Voltage 120V-277VAC
Frequency 45-65HZ
Current 0.2A Max
Table 3 Part number description
Description Part Number
150 Meter Kit NX150MLBSKIT
50 Meter Kit NX050MLBSKIT
3
The Company Behind the Products
Technical Support/Service
With over a million installations around the globe, Liebert
is the world leader in computer protection systems. Since
its founding in 1965, Liebert has developed a complete
range of support and protection systems for sensitive
electronics:
• Environmental systems–close-control air
conditioning from 1 to 60 tons
• Power conditioning and UPS with power ranges from
300 VA to more than 1000 kVA
• Integrated systems that provide both environmental
and power protection in a single, flexible package
• Monitoring and control–from systems of any size or
location, on-site or remote
• Service and support through more than 100 service
centers around the world and a 24/7 Customer
Response Center
While every precaution has been taken to ensure the
accuracy and completeness of this literature, Liebert
Corporation assumes no responsibility and disclaims all
liability for damages resulting from use of this information
or for any errors or omissions.
© 2006 Liebert Corporation
All rights reserved throughout the world. Specifications
subject to change without notice.
® Liebert and the Liebert logo are registered trademarks
of Liebert Corporation. All names referred to are
trademarks or registered trademarks of their respective
owners.
SL-25247 (2/06) Rev. 0
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@liebert.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@liebert.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@liebert.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Italy
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD)
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 25722201
Fax: 852 28029250
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