描述
CPU模块的工作电压一般是5V，而PLC的输入／输出信号电压一般较高，如直流24V和交流220V。从外部引入的尖峰电压和干扰噪声可能损坏CPU模块中的元器件，或使PLC不能正常工作。在I／O模块中，用光耦合器、光电晶闸管、小型继电器等器件来隔离PLC的内部电路和外部的I／O电路，I／O模块除了传递信号外，还有电平转换与隔离的作用。
Agilestar – ONS-SC-4G-31.9-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-32.6-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-33.4-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-34.2-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-35.0-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-35.8-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-36.6-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-37.4-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-38.1-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-38.9-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-39.7-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-40.5-AS – For Cisco – New in Box
Agilestar – ONS-SC-4G-41.3-AS – For Cisco – New in Box
