User guide

Chapter 6
1203–5.5 September 1995
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
Front View Enclosed Version
AB0414C
SCANport STS
Serial STS
TX
SW1SW2SW3
J4
J2
Front View Open Version
RX
TX
Serial STS
SCANport STS
RX
Chapter Objectives