Quick Facts UL® approved. Three-way isolation, 2000-V input/output. Operates in harsh environments, withstanding temperatures of -40° to +185° F (-40° to +85° C). Features 600 W of surge suppression. Optical isolation protects your devices from transient surges and ground loops on your data line. Further Details Adds 4000 feet (1219.2 m) and another 32 nodes to an RS-485 data circuit. By configuring one side as RS-422 and the other side as RS-485, it acts as a converter to enable a 4-wire RS-422 device to communicate with a 2-wire RS-485 device. Features 10-48-VDC operation and withstands temperature extremes. Modbus ASCII or RTU compatible. Automatic Send Data Control eliminates the need for driver software. Conveniently mount on optional DIN Rails.