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Chapter Objectives
Troubleshooting
Use this chapter to help you troubleshoot your Serial
Communications Module system using the LED indicators on the
front of the device (as shown below). The Serial Communications
Module is a non-serviceable device that you should return to
Allen-Bradley for replacement when a major fault exists that is
attributable to the Serial Communications Module itself.
LED Locations
TX
Serial STS
SCANport STS
RX
Front View Enclosed Version
Chapter
Front View Open Version
SW3
SW2
J2
RX
SCANport STS
Serial STS
TX
6
SW1
J4
AB0414C
1203–5.5 September 1995
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