USB to 4 ports RS485 converter, easy to use, Windows7/8/Vista, Linux. A quick and easy way to expand ... long term management and integration costs. Features: 1. USB to 4-port RS-485/422 converters2. Single chip(ASIC ... B),GNDWorking mode: Asynchronous, point to point, 2 wires half duplex, 4 wires full duplex Transmission: 1200mInterface protection ... 04-24 04:59:54 USB to 4 Port RS485/422 Converter-USB4485