Serial Multiplexer & Rs-485 Boards; Cni2 Board With Rs-485 Board And Multiplexer Board - Honeywell CNI2 Operating And Installation Manual

CNI2 Operating and Installation Guide
Serial Multiplexer & RS-485 Boards
It is possible to support both the RS-232 serial data transfer and RS-485 transfer by switching
channels with the multiplexer board. An example of where this might be of value is when there
is a corrector that requires an RS-232 data link, and a pressure transducer that requires an RS-
485 connection. Take note however that serial data exchange can take place only on a channel
at a given time.

CNI2 Board with RS-485 Board and Multiplexer Board

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