Rockwell Automation 1203 Serial Communications Module PPG OPTOMUX - Manual (Page 23)

Chapter 4 Chapter
4-1
Troubleshooting
Chapter Objectives Use this chapter to help troubleshoot your serial communications system
using the LED indicators on the front of the device (Figure 4.1). 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 4.1
LED Locations
Front View Enclosed Version
AB0498A
SCANport Sts
Serial Sts
TX
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.
ATTENTION: Do not attempt to defeat or override fault circuits.
The cause of a fault indication must be determined and corrected
before attempting operation. Failure to correct a drive or system
malfunction may result in personal injury and/or equipment
damage due to uncontrolled machine system operation.