The RS-422 serial port on Beam is full duplex to allow bi-directional external control.
- Baud rate: the RS-422 serial port on the Beam has a maximum baud rate of 115,200 bits per second / 115.2 kbps.
- Stop Bit: 1 or 2
- Character Size: can be set from 5 bits (CS5) to 8 bits (CS8)
- Parity: Odd, Even, or Disable
- Flow Control: always disabled (no option to enable)
The RS-422 port is configured in the Web UI of the Beam, as described in section 2.2 of the Beam User Guide (download links available here).
The Beam transmitter / TX configuration is shown on page 15, while the Beam receiver / RX configuration is shown on page 21.
Pinout / pin configuration
The RS-422 pinout / pin configuration is listed in section 3.7 of the Beam User Guide.
Pin 1: RXD positive
Pin 2: RXD negative
Pin 3: TXD positive
Pin 6: TXD negative
NOTE: RXD (receive) refers to input into Beam, TXD (transmit) refers to output from Beam.