What are the RS-422 serial port characteristics on Beam?

Overview

The RS-422 serial port on Beam is full duplex to allow bi-directional external control.

Settings

• 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)

Configuration

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.