4.3Connections, Operating and Display Elements

Front

1Main switch of the UPS (mains switch)

2LED displays:

Green LED: Mains/normal operation

Yellow LED: Battery operation

Red LED: Warning/fault,

battery renewal indication

Rear

1Load connections with overvoltage protection and UPS backup

2Mains connection (UPS input) with input fuse and integrated back-up fuse

3Data interface for modem/ fax/ phone (RJ11)

4RS232 communication interface (SUB-D 9-pin socket)

5USB connection

6Load connection with direct mains supply (with overvoltage protection) – without UPS back-up!

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