ABB RMC-100 Startup Manual page 8

Table 2 identifies RS-232, RS-422, and RS-485 communication pinouts for COMM 1
and COMM 2.
Table 2: COMM 1 and COMM 2 serial communication pinouts
PIN RS-232
1 Voltage Out (VOUT)
2 Ground (GND)
Switched voltage
3
(Sw VOUT)
4 Operate (OPER)
Remote request to send
5
(RRTS)
6 Request to send (RTS)
7 Transmit data (TX)
8 Receive data (RX)
9 Clear to send (CTS)
To wire the serial communication port:
IMPORTANT NOTE: Refer to the RMC user drawings for COMM wiring
details for specific external devices. See the Additional information
section.
CAUTION – Equipment damage. An external device can be powered
from pin 1 (VOUT) or pin 3 (Sw VOUT) on both COMM1 and COMM2.
The output voltage at these pins is dependent upon the external power
supply connected to the CHARGER/EXT PWR port.
Before connecting to these pins, ensure that the device is compatible
with the input voltage at the CHARGER/EXT PWR port. Connecting an
incompatible device may result in damage to the device.
1. Use a slotted screwdriver to pry the terminal connector off the electronic board.
2. Trim the wire covering back ¼ inch on each wire.
3. Loosen the terminal connector screws for the correct pin according to Table 2.
4. Insert the wires in the required pins. If powering the device from the COMM port:
a. Use pin 1 (VOUT) and pin 2 (GND) to provide constant voltage.
b. Use pin 3 (Sw VOUT) and pin 2 (GND) to provide switched voltage.
5. Tighten the terminal connector screws.
CAUTION – Equipment damage. Do not overtighten the terminal
connector screws as this may damage the wire.
6. Insert the terminal connector back onto the COMM port if it was removed.
8 | 2105551-001 rev. AC
RS-422
Voltage Out (VOUT)
Ground (GND)
Switched voltage
(Sw VOUT)
Operate (OPER)
Remote request to send
(RRTS)
Transmit bus+ (TBUS+)
Transmit bus- (TBUS-)
Receive bus+ (RBUS+)
Receive bus- (RBUS-)
RS-485
Voltage Out (VOUT)
Ground (GND)
Switched voltage
(Sw VOUT)
Operate (OPER)
Remote request to send
(RRTS)
Transmit/Receive (BUS+)
Transmit/Receive (BUS-)
Not Used
Not Used