... server via a USB port. USB4485provides four RS-485/422serial ports, is compliant with USB 1.1 ... and integration costs. Features: 1. USB to 4-port RS-485/422 converters2. Single chip(ASIC) USB port ... for External Antenna: USB type B femaleRS-485/422Standards: RS-485, RS-422Number of Ports: 4Connectors: DB9 ... +(A), TX-(B), RX+(A), RX-(B),GNDRS-485 signal: D+(A), D-(B),GNDWorking mode: Asynchronous, ...