Serial Interface COM1ΒΆ
The serial interface COM1 can be used for:
- Online access (RS-232 programming interface for Automation_Builder software)
- Free protocol
- MODBUS RTU, client and server
- CS31 system bus (RS-485), as master only
Serial Interface COM1 of the Terminal Bases.
Pin assignment
| Serial Interface | Pin | Signal | Interface | Description | |
|---|---|---|---|---|---|
| 1 | FE | - | Functional earth | ||
| 2 | TxD | RS-232 | Transmit data | Output | |
| 3 | RxD/TxD-P | RS-485 | Receive/Transmit | Positive | |
| 4 | RTS | RS-232 | Request to send | Output | |
| 5 | SGND | Signal ground | 0 V supply out | ||
| 6 | +5 V | - | 5 V supply out | ||
| 7 | RxD | RS-232 | Receive data | Input | |
| 8 | RxD/TxD-N | RS-485 | Receive/Transmit | Negative | |
| 9 | CTS | RS-232 | Clear to send | Input | |
| Shield | FE | - | Functional earth | ||
Attention
:strong:Risk of corrosion!
Unused connectors and slots may corrode if XC devices are used in salt-mist environments.
Protect unused connectors and slots with TA535 protective caps for XC devices TA535: Protective Caps TA535 for XC Devices TA535 - Protective Caps for XC Devices.