Rockwell Automation T3150A ICS Regent Communications Module - Manual (Page 4)

Communications Modules (T3150A)
4
Industrial Control Services
are checked by the processor modules’ normal
communications processing.
Failures result in a COMM module error indication at the
processor modules and a COMM error at the communications
module.
Front Panel
Figure 2 shows the physical features of the communications
modules. The front panel of each module contains indicators
showing overall module health, and the transmit and receive
status of each channel. In addition to the front panel
indicators, each communications module has two DB-25
connectors (female).
COMM Indicator
This red and green LED pair indicates the overall health of
the module. During normal operation the green LED is on. If
a communications module fault is detected, the red LED turns
on and the green LED turns off.
Transmit/Receive Indicators
These green LEDs are connected directly to the serial signal
lines and flash while data are being transmitted or received.
The TX LED flashes as data are sent from the module, and
the RX LED flashes as data are received by the module.