RS232 to RS485/422 serial converter Powered from double side, 2500V isolation, 1500W surge protection Products ... powered by an external power supply.Features1. Powered from double side, 2500V isolation, 1500W surge protection2. Transmit distance ... GNDRS-422 signalR+, R-, T+, T-, GNDWorking formatAsynchronism, point to point or multi-point, 2 line half duplex, 4 line full duplexDirectionAutomatic Send ...