Figure 17 Connecting System Parallel Control Cables; Figure 18 Auxiliary Dry Contact Cables For Output Breaker In Multi-Module System - Emerson Liebert NX 480V User Manual

Figure 17 Connecting system parallel control cables

1
Parallel Board
X3
X2-2
X1-1
Auxiliary Dry Contact Cables
The external output breaker of each UPS must have Normally Open auxiliary contacts. These con-
tacts must be wired to connector X3 on the Parallel Logic Board (M3). See Figures 18 and 19.

Figure 18 Auxiliary dry contact cables for output breaker in multi-module system

CAUTION
!
The auxiliary control wire must be installed to ensure proper operation of the system.
NOTE
For startup procedure, 9.2 - UPS Startup.
UPS
2
Parallel Board
X3
P5 P5
X4 X4
X2-1 X2-2 X2-1
X1-2 X1-1 X1-2
2 X2
P2
1 X2
P1
3
Parallel Board Parallel Board
X3
P5
X4
X2-2 X2-1
X1-1 X1-2
T A I N M T :X
30
4
X3
P5
X4
X2-2 X2-1
Interconnecting
Cables
X1-1 X1-2
Options