APC 10-40KW 400V UPS manual External Control Cables, Power Cables

External Connection

Parallel Board

X021:15-pin SUB-D female

X020:15-pin SUB-D female

External multicore cable with 14 wires + shield to other parallel units

UPS 1 UPS 2

UPS 3

External Control Cables

External multicore cable is equipped with 15-pin SUB-D plug at either end. Connect pin 1 to pin 1, and pin 2 to pin 2 etc. up to pin 15 - with the exception of pin 8, which is not to be connected.

Shield is connected to plug cover at both ends.

Terminals X020 and X021 for control cables located on parallel board. Connect X020 in UPS1 to X021 in UPS2, and connect X020 in UPS2 to X021 in UPS3 etc. Connect X020 in last UPS to X021 in UPS1.

Cable is delivered with the UPS.

Power Cables

To optimize load-sharing in parallel operation, external power circuits must be “symmetrical”: Power input and output cables to have same length and identical cross-sections.

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Installation Guide APC Silcon 10-40kW 400V UPS	21