Industrial BACnet/IP to Modbus RTU Converter. GW-5492 is a fully configurable universal Modbus RTU to BACnet/IP gateway. The GW-5492 includes BACnet/IP Server and Modbus RTU Master which is used to make Modbus RTU devices accessible on a BACnet network. BACnet (Building Automation and Control Networking) protocol has been designed specifically to meet the communication needs of building automation and control systems for applications such as heat..