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.
F igu re 4.4 Illu stratio n drawin g o f co m m u n icatio n po rts
N o.
D es crip tion
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
42
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM 0250kMK16FN02000
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