描述
I/O单元实际上是PLC与被控对象间传递输入输出信号的接口部件。I/O单元有良好的电隔离和滤波作用。接到PLC输入接口的输入器件是各种开关、按钮、传感器等。PLC的各输出控制器件往往是电磁阀、接触器、继电器，而继电器有交流和直流型，高电压型和低电压型，电压型和电流型。
Zygo 7005 + Retroreflector + base (lot of 2)
Lam research 810-17030-005 rev. 5
ILX lightwave LDX-3525 precision current source
ASM HPD 50C servo driver card
Silicon graphics 013-2978-001 Rev C & 030-1423-002
Mitsubishi AOJ2CPUP23 & AOJ2-E56DT
HP laser head 5517B cable and power supply 300uW
Spectra-Physics 0129-7082-23S
Siemens SD EA feeder center controller P/N: 000731016
Applied materials heater/susceptor leveling system
Mitsubishi AOJ2HCPU & AOJ2-E28DT & AOJ2-E56DT
Siemens 115U CPU 941B 6ES5 941-7UB11
