Wire Input And Output - ABB RMC-100 User Manual

Figure 3-5: COMM 1 for RS-485 communication with multiple devices
RS-485
Power +
Ground -
Multivariable
transmitter
3.5.5

Wire input and output

Wire the RMC I/O ports to monitor, control and power external devices. Wire for power if the external
device has no external power supply.
To wire the I/O port:
IMPORTANT NOTE: Refer to the RMC user drawings for I/O wiring details for specific external
devices. See the
Additional information
NOTICE – Equipment damage. An external device can be powered from pin 1 (PWR) on
any of the AIs
depends on the external power supply that connects to the CHARGER/EXT PWR port.
Before connecting to these pins, verify that the external device is compatible with the input
voltage at the CHARGER/EXT PWR port. Connection to an incompatible device can result in
damage to the device.
1. Pry the terminal connector off the electric board with a slotted screwdriver.
2. Trim the wire covering back ¼ inch (0.635 cm) on each wire.
3. Loosen the terminal connector screws for the correct pin according to I/O tables.
4. Insert the wires in the required pins. If powering the device from the AI or the AO:
Use pin 1 (PWR) and pin 3 (GND) for devices attached to the AI.
•
Use pin 1 (PWR) and pin 4 (GND) for devices attached to the AO.
•
• Tighten the terminal connector screws.
NOTICE – Equipment damage. Do not overtighten the terminal connector screws. This
can damage the wire.
5. Insert the terminal connector into the I/O if it was removed.
3.5.5.1 Analog input pinouts
Table 3-3 and Figure 3-6
NOTICE – Equipment damage. Before connecting to pin 1 (PWR), ensure that the
external device is compatible with the input voltage at the CHARGER/EXT PWR port.
Connection to an incompatible device can result in damage to the device.
Tx
RS-485
Rx
Power +
Ground -
Multivariable
transmitter
section.
(Table 3-3) or from the AO
identify the AI pinouts.
Tx
Rx
(Table 3-4). The output voltage at the PWR pin
21 05 55 2MN A E | RM C-1 00 | 3 5