RS-232 to RS-485/422 Converter schematic. It can support RS-422 and RS-485 to change only two jumppers. And it used general devices. 75176 can be replaced max485, 65LBC184 etc.

Transporting DNP V3.00 over Local and Wide Area Network. 1 Overview 1.1 Purpose DNP V3.00 (hereafter referred to simply as DNP) was designed for serial point-to-point communication (e.g. RS-232) with limited support for half duplex serial ne

RS-232、RS-422与RS-485标准及应用,详细解答了关于232 485通信的知识-RS-232, RS-422 and RS-485 standard and application, detailed answers to the communication of knowledge about 232,485