免费国精产品自偷自偷免费看_在线看片成人_www.77伦理bt.com_特级黄色一级片_免费夜色污私人影院在线观看_国严精品久久久久久亚洲影视

pc連tp02數(shù)據(jù)線:
       rs232轉(zhuǎn)422     T+   --------------   2
                                  T-   --------------    7
                                  R+  --------------   3
                                  R-   --------------   8

是422接口對應(yīng)于plc的3827