描述
PLC的输入与输出最好采用分开走线，开关量与模拟量也要分开敷设。模拟量信号的传送应采用屏蔽线，屏蔽层应一端或两端接地，接地电阻
电阻，物质对电流的阻碍作用就叫该物质的电阻。电阻小的物质称为电导体，简称导体。电阻大的物质称为电绝缘体，简称绝缘体。应小于屏蔽层电阻的1／10。
HP Agilent 8904A Synthesizer opt 01,02,04 -CALIBRATED-
Agilent – HP 85131E Connector Coaxial Flexible Cable
HP AGILENT 81662A DFB LASER SOURCE +10 DBM ~8163A 8164A
Agilent HP 83446A Lightwave Clock/Data Receiver OC48
HP Agilent 6060A System DC Electronic Load
HP/Agilent 85134-60004 2.4mm to 3.5mm Flexible Cable
HP Agilent 8671A 6.2GHz Microwave Frequency Synthesizer
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Agilent HP 54503A 500 MHz, Digitizing Oscilloscope
HP / Agilent 81651A Laser Source Module/1550nm
Agilent HP 5335A/010/030/40 Universal Frequency Counter
