Description: There are currently more commonly used 9-pin serial port (DB9) and 25-pin serial port (DB25), while the short distance communication (< 12m), power cables can be connected directly to standard RS232 port (RS422, RS485 far), if the distance over far, the need to attach a modem (MODEM). The most simple and commonly used is a three-wire connection, that is, the receive data and send data tripod connected, this only involves the most basic connection, and directly connected with RS232 to answer the front-end consulting friends
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DOP-B_Q_TSE_20101101.pdf
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