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Chapter 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
Figure 2.1: Location of connectors
Clear front cover
Serial port 1 RS-232 connector
Serial port 2 RS-232 connector
Ethernet connector
DIN rail clip
Power LED
Ethernet link LED
Device status LED
Communication status LED
Power terminals
Serial port 1 and 2 RS-485 or serial port 1 RS-422 terminals
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.
UMMBDC200-2201
Description
FRONT VIEW
3
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