User's Manual

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5.4 OEU Installation
OEU is used to expand ROU in Campus Site.
OEU is located at a Remote Closet. As it can be equipped with up to two DOUs, you
can expand a total of eight ROUs.
5.4.1 OEU Shelf installation
OEU is a shelf in around 2U size. Its width is 19” and so this unit should be inserted into a 19”
Standard Rack. OEU is in a Remote Closet, providing optical ports of ROU.
The following table shows power consumption of OEU:
No. Unit Description Remark
Common Part
Shelf
Including EWDM,ERF,EPSU,ECPU,
19”,2U
1EA
Power Cable -48Vdc Input with two lug terminal 1EA
Optional Part DOU Optical Module with 4 Optic Port
Up to 2EA to be
inserted
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.