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Installation Guide APC Silcon 240-320kW 480V UPS 29
4.3 Parallel Board
The built-in parallel board connects two or more UPS systems in parallel, either to obtain
increased system reliability or to obtain higher output power. The parallel board also ensures
correct load-sharing between parallel systems.
To prepare the UPS for parallel/redundant mode, disconnect all sources of AC and DC power
supply to the UPS and connect the ribbon cable from the parallel board to the main controller
board. (The ribbon cable is delivered with the UPS).
Complete the parallel system set-up by connecting the external control cables (see below).
Follow instructions in section 5.3 Programming of this guide to execute necessary
reprogramming.
CAUTION!
Control cables must be separated from AC and DC power cables.
NOTICE!
For reliability reasons, APC recommends separate battery packs in redundant/parallel
configurations.
Parallel Board
CAUTION!
Do not connect ribbon cable in single configurations. Ribbon cable is for parallel operation only.