描述
根据统计资料表明：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。
Allen Bradley 1394C-SJT10-D C 1394-SJT10-D
Siemens Panel 6AV6 545-0BC15-2AX0 6AV65450BC152AX0
Siemens Panel 6AV6 545-0BC15-2AX0 6AV65450BC152AX0
New Sealed Panelview Plus 2711P-K6M20A B 2711PK6M20A
Allen Bradley 1398-DDM-030 1398DDM030 Ultra Series
New Allen Bradley 2094-BM01 /A 2094BM01 Kinetix 6000
New Allen Bradley 2094-BM01 A 2094BM01 Kinetix 6000
Allen Bradley Panelview 2711P-RDK10C /A 2711PRDK10C
MINT Pacific Scientific SC753A001-01 SC753A00101 Servo
Allen Bradley Powerflex 70 20AD022C3AYNANNN /A 15HP
Allen Bradley 2711P-RP1 /B 2711PRP1 Panelview Plus
NEW Rosemount 03031-0761-2052 0303107612051
