... delay automatic transmit Support EIA RS-232, RS-485 standard RS-232 signal TX , RX, GND RS-485 signal D+, D-, GND Asynchronism, point ... serial signal rate Support 128 point loopback RS-485 side 1200M (9600bps), RS-232 side less than 5M 600W surge protection, 15KV ... *33mm*16.5mm Shell: Plastic Color: Black Weight: 50g RS-232/485 Converter(Industrial Port-Powered Isolation )