RS232 to RS485/422 serial converter Powered from double side, 2500V isolation, 1500W surge protection Products Content:Model485P ... powered by an external power supply.Features1. Powered from double side, 2500V isolation, 1500W surge protection2. Transmit distance can ... handtailor 128 point)Transmission RS-485/422 side 1800M(115200bps), RS-232 side less than 5MPort protection1500W surge protection, ...