The GT200-BM-2RS is a two serial interface, Modbus to BACnet IP gateway. It connects multiple Modbus devices to the BACnet IP network. This gateway is widely used in Building Automation and acts as a Modbus master and BACnet IP server. Protocol conversion between BACnet and Modbus. Ethernet 10/100M self-adaptive. BACnet IP can realize some services such as: Who Is, I Am, Who Has, I Have, Read Property, Write Property, Read Property Multiple. Supports at most 500 BACnet BI, 300 BO, 300 BV, 500 AI, 300 AO, 300 AV, 500 MSI and 100 MSO. Each serial support at most 100 commands. The two serial ports are RS485 interface, half duplex, baud rate: 9600, 19200, 38400, 57600, 115200bps optional, check bit: none, odd, even, mark and space optional, 1 or 2 bit stop bit optional. 1KV galvanic isolated on one RS485 interface. Power supply: 24VDC (11V-30V), 90mA (24VDC). Operating Temp: -4°F to 140°F (-20 °C to 60 °C); Rel. Humidity: 5%-95% (non-condensing). Dimension(W*H*D):1.6 in*5 in*4.33 in (40mm*125mm*110mm). Mounting: DIN Rail Mounting (35mm).