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。
FORCE SPARC CPU-5V/64-110-2 /16 VME MAINFRAME CARD
Motherboard Pentium TYAN Tomcat S1562-PCB-04 S1562S
Motherboard Pentium TYAN Tomcat S1563-PCB-01 3.02
Hard Drive ESDI Micropolis 1568 ES0003-01-1D Disk FH
Sony Optical Drive SMO-E301 MO Disk Drive 1993
Hard Drive SCSI Micropolis 1588-15MBSUN0669 370-1326-04
Hard Drive SCSI Epson HMD-946-504-01 HMD946
MFM Hard Drive Miniscribe 8425 Vintage 3.5
Data Translation DT2871 color frame grabber board ISA
