供我国使用的PLC的供电电源有两种形式：交流220V  电源和直流供电电源（多为24V）。图0提供的端子图为交流供电，如图1所示。图中L表示火线、N表示零线，     表示接地。交流供电的PLC提供辅助直流电源，供输入设备和部分扩展单元用。FX_2N系列PLC的辅助电源容量为250～460mA。在容量不够的情况下，需要单独提供直流电源

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CABLETRON GIGA ENET 9G536-04 SMART SWITCH INCLUDES 4 X 1000BASE-SX 850nm MODULE

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CABLETRON FAST ENET 9H423-26 SMART SWITCH

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