You connect an Isolated RS-485 Adapter (via a separate connection cable) to a BACnet/IP controller to convert the controller RS-485 RJ45 interface to screw terminals, which is required to connect the controller to a BACnet MS/TP (RS-485) network. You use an Isolated RS-485 Adapter (SXWISORS48510001) when the BACnet MS/TP network is comprised of isolated controllers, such as MNB BACnet devices (zone controllers) and selected others.
Connect a Cat 5 (or higher) unshielded, straight-through wired cable with eight conductors (four twisted pairs) with RJ45 connectors to the RJ45 receptacle on the RS-485 adapter.
Use a cable with the wire size (cross-sectional area) 22 to 26 AWG (0.34 to 0.14 mm²), a maximum length of 0.3 m (12 inches), and a rating that meets the requirements of the target environment, for example, plenum space.
The cable is not included.
Connect the other end of the cable to the RP controller RS-485 Com B port or MP-V controller RS-485 Com A port.
The RS-485 Com port needs to be configured for BACnet MS/TP (RS-485) network. For more information, see RP-C BACnet MS/TP Support .For more information, see Allocating Flexible Ports .
You can now install and wire the RS-485 adapter.