DIFAR44 DUAL 3.0KV Isolated RS485&lt;=&gt;RS485 Inline Repeater/Extender, Assembled Circuit Board Only Fast RS485&lt;=&gt;RS485 Auto Transmit-Enable Repeater for 2 wire half-duplex communications in point to point, and multi-drop networks. Extends the distance(up to 4000ft) and number of "standard" unit loads (32 each side) on a network at data rates up to 230.4Kbps. Dual Galvanic (transformer and optical) Isolation of 3KV helps eliminate noise, and protect equipment from destructive transients often found in industrial environments. Transparent to all asynchronous data with any combination of data, parity, and stop bits for Baud rates up to 230.4Kbps, without the need to set jumpers or switches. Fast auto turn-around time to Receive Mode requires no delays and eliminates timing problems and data collisions Robust Transient Protection bridge, and Auto Reset communications fuses to protect the RS485 Transeiver ICs Edge mounted user visible LED indicators, removable screw terminal strips, and user accessible jumper selections for Bias and Termination on each side of the interface. Termination resistors(120 ohms), and split Bias resistors (2-1.2K ohm pull-up and pull-down) can be jumper configured to the requirements of the network. A versatile on-board efficient power regulator circuit allows the unit to accept a wide range of supply voltages: from 9 to 35Vdc and 12 to 24Vac. Typical power consumption is under 1.0 watt Operating Temperature Range: -40C to 85C (-40F to 185F) Humidity Range: 10% to 90% Relative Humidity (Non-Condensing) Conformal Coating Available(Call us: 513-874-4796) Units are generally stock to 2-3 business days for shipment. We design and manufacturer our entire product line. Provide technical support for our units, and can offer system recommendations for your application(s). Please give us a call: 513-874-4796