W A R N IN G !
1. T h e R J 45 po rts o f th e UF -R S48 5 card m u st co n n ect to SELV circu it. F ailu re to o bserve th is
co u ld cau se dam age to th e card an d even resu lt in safety acciden ts.
2. T h e co n n ectin g cable o f th e UF -R S48 5 card an d th e extern al equ ipm en t m u st be a do u ble-
en d sh ielded cable.
Troubleshooting
Fault: The UF-RS485 output signal does not change with the UPS status.
Action to take: Ensure that the UF-RS485 card is properly inserted into the Intellislot port and the cable is properly
connected.
9.2.11 BCB Cabinet
For details, refer to BCB Cabinet (Optional).
9.2.12 LBS Cable
Shielded and double-insulated parallel control cables (LBS1 and LBS2) available in lengths of 10 m, 15 m and 20 m. The
LBS cable must be interconnected in a branch configuration between LBS1 and LBS2 of any UPS modules, as shown in
Figure 8.7 on page 145.
9.2.13 Parallel Cable
Shielded and double-insulated parallel cables available in lengths of 5 m, 10 m and 15 m must be interconnected in a ring
configuration between the UPS units, as shown in Figure 8.2 on page 135. Method: connect a module parallel cable from its
PARA1 port to the PARA2 port of another module. Follow this method to connect other parallel cables.
The ring connection ensures the reliability of the control of the parallel system. Be sure to verify the reliable cable
connection before starting up the system!
9 Options
161
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM 0250kMK16FN02000
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