描述
在PLC控制系统的故障中，CPU占5%，I/O接口占15%，输入设备占45%，输出设备占30%，线路占5%。前二项共20%故障属于PLC的内部故障，它可通过PLC本身的软、硬件实现检测、处理；而其余80%的故障属于PLC的外部故障。因此，PLC生产厂家都致力于研制、发展用于检测外部故障的专用智能模块，进一步提高系统的可靠性。
NATIONAL INSTRUMENTS GPIB-130 BUS EXTENDER
NATIONAL INSTRUMENTS GPIB-120A BUS EXPANDER/ISOLATOR
National Instruments PCI-GPIB IEEE 488.2 Card
VHDCI Breakout for National Instruments w/ 12′ Cable
NATIONAL INSTRUMENT FP-TB-01 USPP FPTB01
NATIONAL INSTRUMENT FP-TB-1 USPP FPTB11
NATIONAL INSTRUMENT FUS-130 NSPP FUS130
National Instruments NI SCXI-1162HV 32 Channel Module
National Instruments Daq Card 700 Data Aquisition
Expedited shipping available
NATIONAL INSTRUMENTS GPIB-120A BUS EXPANDER / ISOLATOR
