Vertiv Liebert APM Plus - 4.2 Wiring of Signal Cable

4.2 Wiring of Signal Cable
4.2.1 Overview
For on-site specific needs, the UPS needs auxiliary connection to realize battery system (including the external battery
switch) management, communicate with PC, provide alarm signal to external devices, realize remote EPO or provide bypass
back feed circuit breaker signal and parallel communication. These functions are realized through the communication box in
the UPS cabinet. As shown in Figure 4.4 below, the communication box provides the following ports.
Figure 4.4 Illustration draw ing of co m m unication ports
N o. Descriptio n
J2 Battery temperature detector port
J3 Parallel port
J4 LBS port
J5 REPO port
J6 BCB and battery port
J7 I/O dry contact port
J8 Back-feed port
4 Electrical Installation
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Vertiv™ Liebert® APM Plus User Manual