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。
HONEYWELL 622-3010-M CNC-CPU BOARD 6223010M
Expedited shipping available
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NEC Dual CPU Board Assy EXP350E DG7FMU 243-630153
DEC VAX 4000/300 CPU board KA670 + H3604 console module
CPU Board Opteron 880 OST880FAA6CC 397844 403836
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VALMUT CPU BOARD PLC M851007 547070-1B NR
Advantage Electronics Model: 3025-A CPU Board
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