Serial Interface COM1ΒΆ
The serial interface COM1 is connected to a removable 9-pin terminal block.
From firmware version V3.1 it is configurable for RS-232 or RS-485 (V3.0 RS-232 only).
Pin assignment
| 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 | Signal Ground | ||
| 8 | RxD | RS-232 | Receive data (input) | ||
| 9 | CTS | RS-232 | Clear to send (input) | ||
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.
Note
For further information on connection and wiring please refer to Serial Interface COM1 of the Terminal Bases: Serial Interface COM1 of the Terminal Bases