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2. Description
The power and RS-485/RS-422 terminals are placed on the top side of the unit. The RS-232 and Ethernet
connectors are placed on the bottom side of the unit as shown in the following illustration:
TOP VIEW
BOTTOM VIEW
Illustration 2.1: Location of connectors
Clear front cover
RS-232 connector
Ethernet connector
DIN rail clip
Power LED
Ethernet link LED
Device status LED
Communication status LED
Power terminals
RS-485/RS-422 terminals
2.1 LED indicators
Four LEDs located at the front panel indicate the status of the device. The LEDs assist maintenance personnel
in quickly identifying wiring or communication errors.
A LED test is exercised at power-up, cycling each LED off, green and then red for approximately 0.25 seconds.
At the same time the power-on self test of the device is performed.
UMSLMODGW-1006
FRONT VIEW
3
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