描述
PLC控制着一个复杂系统，所能看到的是上下两排错开的输入输出继电器接线端子、对应的指示灯及PLC编号，就像一块有数十只脚的集成电路。任何一个人如果不看原理图来检修故障设备，会束手无策，查找故障的速度会特别慢。
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HP/Agilent 85025B Detector, 10 MHz to 26.5 GHz
AGILENT / HP 11612B BIAS NETWORK w/ OPT K11
HP/Agilent 6632B 100 Watt System Power Supply, 20V, 5A
HP/Agilent 1181A Mobile / Scope Test Cart
Agilent HP N2263A 32-Bit Digital Input/Output Module
HP AGILENT 141T SPECTRUM ANALYZER 8552B, 8553B, 11593A
HP / Agilent 8620C Sweep Oscillator 86241A RF Section
HP Agilent 35677B 100KHz-200MHz S-Parameter Test Set
HP Agilent 8904A Synthesizer
HP/Agilent 85037B Precision Detector, 10 MHz – 26.5 GHz
HP AGILENT 83480A DIGITAL COMMUNICATIONS ANALYZER
HP/Agilent 60501B 3-60V, 0-30A DC Electronic Load Modul
