描述
PC的RS232是9针,不能和NB的RJ45直接连接的,RJ45这边是RS422,所以需要转换模块,如果有三菱的SC-09电缆可以用它再做个和RJ45的连接线即可。
SC-09编程电缆为RS232接口(俗称COM口)到RS422接口的转换电缆,通用于三菱A系列和FX系列PLC,支持所有通信协议,用于电脑与PLC的编程通信和各种上位机监控软件,并可替代三菱通信模块FX-232AW(或FX-232AWC),该电缆的RS422端口和RS232端口均内置±15kVESD保护电路,可带电任意带电插拔。
DB25母头引脚定义如下:
RS-232模式:采用标准的DB25针串口标准,2脚(收),3脚(发),7脚(地);
RS-485模式:采用DB25母头的14(485-),15(485+)脚;
RS-422模式:采用DB25母头的14(T-),15(T+),16(R-),17(R+)脚;
电脑机箱后方的9芯插座,旁边一般有”|O|O|”样标识。
RS-232C接口电气特性
EIA-RS-232C对电器特性、逻辑电平和各种信号线功能都作了规定:
在TxD和RxD上:逻辑1(MARK)=-3V~-15V
逻辑0(SPACE)=+3~+15V
在RTS、CTS、DSR、DTR和DCD等控制线上:
信号有效(接通,ON状态,正电压)=+3V~+15V
信号无效(断开,OFF状态,负电压)=-3V~-15V
RS-232-C标准规定的数据传输速率为每秒50、75、100、150、300、600、1200、2400、4800、9600、19200波特。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
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