ABB RMC-100 Startup Manual page 7

4.2 Mounting the RMC
To mount the controller on the DIN rail:
1. Position the RMC on the DIN rail.
2. Push the RMC onto the DIN rail until it snaps into place (Figure 1).
IMPORTANT NOTE. To remove the controller, use a slotted
screwdriver inserted in the access slot of the DIN rail release clip to
loosen the clip. For more information, refer to the Maintenance and
Service section in the RMC User Manual.
4.3 Wiring COMM ports
Wire the RMC COMM ports to communicate with and power external devices. Wiring
for communication depends on the type of serial interface required by the device.
Wiring for power is required if there is no external supply powering the device.
Table 1 provides the specifications for the serial communication ports.
Type Maximum Length
RS-232 50 feet (15 meters)
RS-485 or
4000 feet (1220 meters)
RS-422
CO MM E X P A N SIO N
Figure 1: Mounting the RMC
Table 1: Serial communication specifications
Termination
Terminal connector (9 POS), screw termination
and pluggable COMM module
Active when communication module is inserted
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