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Configure the COM2 port communication mode (RS-232, RS-422/485). The TPC-2230 can be configured through the SW2 jumpers. Legacy TPC models are configured in the BIOS. Refer to the user manual for your device for more information.
- Use the table below for the pin assignments based on the communication mode. For RS-232 communication, connect the transmit (TX) terminal to the receive (RX) terminal. For RS-422 communication, connect the TX and RX terminals of equal sign.
Note: See the user manual for your device for pinout details.
| Communication Mode | Pins |
|---|
| RS-232 | Pin 3 to 2 (TX to RX) |
| RS-422 | Pin 1 to 4 (TX- to RX-)
Pin 2 to 3 (TX+ to RX+) |
| RS-485 | Use RS-422* |
*If the port is set to RS-485, the pins assignment shows a 2-wire mode for which a loopback test is not possible. Set the port to RS-422 and wire the pins required for RS-422 to successfully execute the loopback test.
- Follow How to Perform a Serial Loopback Test to test the communication.