Ground The Controller; Mount The Rmc; Wire Comm Ports; Figure 4-1: Mounting The Rmc - ABB RMC-100 Startup Manual

4.1

Ground the controller

The RMC must be grounded by mounting on a grounded DIN rail.
NOTICE – Equipment damage. The DIN rail on which the controller is mounted must be
bonded to an earthing terminal. The bonding conductor must have a cross sectional area of at
least 12 AWG or 4 mm
To ground the DIN rail:
1. Screw the DIN rail onto the mounting surface.
2. Attach a grounding wire to the DIN rail.
3. Attach the other end of the grounding wire to an electrical ground.
4.2

Mount 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 4-1: Mounting the RMC

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

Wire 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 4-1 provides the specifications for the serial communication ports.

Table 4-1: Serial communication specifications

Type Maximum Length
RS-232 50 feet (15 meters)
RS-485 or RS-422 4000 feet (1220 meters)
Table 4-2 identifies RS-232, RS-422, and RS-485 communication pinouts for COMM 1 and COMM 2.

Table 4-2: COMM 1 and COMM 2 serial communication pinouts

PIN RS-232
1 Voltage Out (VOUT)
2 Ground (GND)
Switched voltage
3
(Sw VOUT)
2 .
Termination
Terminal connector (9 POS), screw termination and
pluggable COMM module
Active when communication module is inserted
RS-422
Voltage Out (VOUT)
Ground (GND)
Switched voltage
(Sw VOUT)
(Figure 4-1).
RS-485
Voltage Out (VOUT)
Ground (GND)
Switched voltage
(Sw VOUT)
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