Rockwell Automation 1203 Serial Communications Module Series A - Manual (Page 49)

Chapter 6 Chapter
6-1
Troubleshooting
Chapter Objectives Use this chapter to help you troubleshoot your Serial Communications
system using the LED indicators on the front of the device (Figure 6.1).
The Communications Module is a non-serviceable device that should be
returned to Allen-Bradley for replacement when a major fault exists that is
attributable to the Communications Module itself.
Figure 6.1
LED Locations
Front View Enclosed Version
AB0414C
SCANport STS
Serial STS
TX
SW1 SW2 SW3
J4
J2
Front View Open Version
RX
TX
Serial STS
SCANport STS
RX
ATTENTION: Servicing energized industrial control equipment
can be hazardous. Electrical shock, burns, or unintentional
actuation of controlled industrial equipment may cause death or
serious injury. Follow the safety-related practices of NFPA 70E,
Electrical Safety for Employee Workplaces, when working on or
near energized equipment. Do not work alone on energized
equipment.