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。
ITE Gould 5600 Fused Sz Size 4 A203F MCC Bucket 150A
GE General Electric QMR Panelboard 1200 Amp 600V THFP
Toshiba VFS9-4110PL-WN 15HP Transistor Inverter
Westinghouse 250 Amp Bus Plug Breaker Switch IBP IBPJD
Westinghouse Breaker FB3070PL 70Amp 70 Amp A Tri-Pac
Omron CS1H-CPU63 CPU Unit w/ CS1W-SCB21-V1 Serial Comm.
ITE Gould 5600 Breaker Size 3 14HSt32A MCC Bucket 150A
Modicon PC-E984-685 Programmable Controller PCE984685
Pacific Scientific SC322A-001 Servo Controller
Yaskawa JUSP-ACP35JAA Servo Drive JUSPACP35JAA
