描述
抗干扰与外部互锁当PLC输出带感性负载，负载断电时会对PLC的输出造成浪涌电流的冲击，为此，对直流感性负载应在其旁边并接续流二极管，对交流感性负载应并接浪涌吸收电路，可有效保护PLC。当两个物理量的输出在PLC内部已进行软件互锁后，在PLC的外部也应进行互锁，以加强系统的可靠性。
National Instruments 180760-02 MXI BUS Cable
VHDCI Breakout for National Instruments NI “M”seies NEW
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VHDCI Breakout for National Instruments NI SCSI ….NEW
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National Instruments PCI-6503 24 bit Digital I/O
National Instruments GPIB Installation Guide
National Instruments NI SC-2070
National Instruments Type X2 763507-02 cable
National Instruments PCIStep 4Axis Open Loop Controller
National Instruments IMAQ-A6822
NATIONAL INSTRUMENTS MXI-2 CABLE 182803A-002
National Instruments Terminal Box – TXB-68
National Instruments AT-GPIB 181060-01 Rev. C2
