3.1.6. 2-Wire RS-485 Connections

To make connections and configure settings for 2-Wire connections between the Serial Adapter and an RS-485 network, use the following diagram and tables:

!If you want to utilize the on-board termination resistor located on the Serial Adapter, set “P5” to the “ON” position. Termination resistors should only be placed on the extreme ends of the network (2 devices only). In addition, the network must be biased correctly or the termination resistors may cause communications errors.

*When set to “2W”, P6 connects TB1-1 to TB1-2.
When set to “2W”, P7 connects TB1-3 to TB1-4.