描述
PLC的供电电源，除了引进设备时同时引进PLC应根据产品说明书要求设计和选用外，一般PLC的供电电源应设计选用220VAC电源，与国内电网电压一致。重要的应用场合，应采用不间断电源或稳压电源供电。
如果PLC本身带有可使用电源时，应核对提供的电流是否满足应用要求，否则应设计外接供电电源。为防止外部高压电源因误操作而引入PLC，对输入和输出信号的隔离是必要的，有时也可采用简单的二极管或熔丝管隔离
NI National Instruments AT-AO-6 181435C-06 AnalogOutput
National Instruments PC-DIO-24 I/O Board, 180710C-01
National instrument PCI-GPIB interface card 183617J-01
National Instruments Din Rail Mounting Kit # 777972-01
Save $290 NI National Instruments PCI DIO96 CARD
National Instruments AT-GPIB/TNT
NI National Instruments PCI DIO96 CARD – Save $290
National Instruments NI PXI-6527 Digital I/O PXI 6527
National Instruments NI IMAQ PCI-1408 Card Tested
National Instruments At-gpib/tnt+ Card
National instrument PCI-6503 interface card 185183A-01
NI NATIONAL INSTRUMENTS MODEL: SCXI-1124
