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。
Fanuc A02B-0094-C106 Battery Unit (NIOP)
Modicon ICC 3000 Power Supply 100-146 (UGC)
Modicon/Gould AS-J200-001 I/O Expander Unit (ULN)
Symbol Technologies P304IMG-I000 Barcode Scanner (NIOP)
Allen Bradley 1770-TA Operator Terminal w/o Keybd (UGC)
Lincoln SRF40S0.33TCN61 AC Motor 1/3HP-230/460V *NEW*
Banner S18UBA Ultrasonic Sensor #02711 *NEW IN OEM BOX*
Square D 8003-CP32 8003CP32 MICRO-1 PLC Module (ULN)
Square D 8003-EX36 8003EX36 MICRO-1 Expansion Mod (ULN)
Automation Intelligence (AI) EXM-10A Ethernet Mod (UEX)
Medar ABB Radisys Medweld
