The 'RS485 module (1 port, DIN rail)' PN2009-A1 provides one analog audio input connector ('X3') to connect components such as call stations.
Analog audio input connector - 'X3'
Pin | Description | Remark |
|---|---|---|
1 | SI+ | Audio in + |
2 | GND | GND reference voltage |
3 | SI- | Audio in - |