Serial Interface COM1ΒΆ
Pin assignment
| Serial Interface | Pin | Signal | Interface | Description | |
|---|---|---|---|---|---|
Terminal block removed |
Terminal block inserted |
1 | Terminator P | RS-485 | Terminator P |
| 2 | RxD/TxD-P | RS-485 | Receive/Transmit, positive | ||
| 3 | RxD/TxD-N | RS-485 | Receive/Transmit, negative | ||
| 4 | Terminator N | RS-485 | Terminator N | ||
| 5 | RTS | RS-232 | Request to send (output) | ||
| 6 | TxD | RS-232 | Transmit data (output) | ||
| 7 | SGND | Signal Ground | |||
| 8 | RxD | RS-232 | Receive data (input) | ||
| 9 | CTS | RS-232 | Clear to send (input) | ||
The serial interface COM1 is connected to a removable 9-pin terminal block. It is configurable for RS-232 and RS-485.
Attention
:strong:Unused connector!
Make sure that the terminal block is always connected to the terminal base, even if you do not use the interface.
For a detailed description of COM1, please refer to Serial interface COM1 Serial Interface COM1 of the Terminal Bases.