The RP-IO module provides the following communication port:
One RS-485 port with terminal block
The RS-485 port with screw terminal block is used for connection to the BACnet MS/TP (RS-485) network.
The screw terminals are labeled:
RS-485+
RS-485–
Shield
For more information, see RP-IO-12A-M-24V Screw Terminals .
For more information, see RP-IO-16E-M-24V Screw Terminals .
For more information, see RS-485 Communications .