RS232 to RS485/422 converters, lightning protection, anti-discharge, photoelectric isolation, external sources, 5KM UT-503

Feature1 Compatible RS-232 and RS-485, RS-422 standards of EIA/TIA 2 Automatic data transceiver without external volume control signal (RTS) and three-line (TXD, RXD and GND) communication. 3 Baud rate: 300BPS-115.2KBPS 4 Working current: 9-30VDC/350mA 5 A maximum connection of 128...