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。
HONEYWELL 51304485-150 Digital Input 51304485150 NEW
HONEYWELL 51305072-400 CLCNIO 51305072400
HONEYWELL 30752766-001 Transceiver RS232C 30752766001
HONEYWELL 51400712-200 Power Supply 51400712200
HONEYWELL 51304672-150 Analog Output 51304672150
YAMATAKE-HONEYWELL 82407465-001 Reg-A 82407465001
YAMATAKE-HONEYWELL 82407468-002 Reg-B 82407468002
HONEYWELL 51400667-100 LCN 51400667100
HONEYWELL 51195066-100 Power Supply 51195066100
HONEYWELL 51304516-100 Smart Transmitter 51304516100
