B&B Electronics UNO-2170 user manual

2.3.6RS-485 Auto Flow Control Mode and RS-422 Master/Slave Mode Selection

You can set the “Auto Flow Control mode of RS-485 or “Master/Slave＂ mode

of RS-422 by using the SW3 DIP switch for each RS-422/485 port. In RS-485, if the switch is set to “Auto＂ the driver automatically senses the direction of

the data flow and switches the direction of transmission. No handshaking is necessary.

In RS-422, if DIP switch is set to “On＂, the driver is always enabled, and always in high or low status.

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