User's Manual

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5.4.2 OEU Power Cabling
The input power of OEU is DC -48V. You need to connect DC cable with the Terminal Block
seen at the rear of OEU.
Terminal Color of cable Description Remark
-48V Blue color Input range: -42 ~ -56Vdc
NC Not Connected
GND Black color
Before connecting the power terminal, you need to connect “+” terminal of Multi Voltage Meter
probe with the GND terminal and then connect “–“ terminal with -48V to see if “-48Vdc” voltage
is measured. After the check, connect the power terminal through the terminal seen below.