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。
RELIANCE ELECTRIC 0-49026-7 USPP 0490267
RELIANCE ELECTRIC 418258-30R NSFP 41825830R
RELIANCE ELECTRIC 0-51419 USPP 051419
RELIANCE 11C178S 2 HP FLEXPAK V-S DRIVE 230VAC 15.5A
Reliance 0-51419 PC Board Gate Coupling
RELIANCE ELECTRIC 0-57170 USPP 057170
Reliance 0-57403/057403/0-57403-E/057403E
One-day shipping available
RELIANCE ELECTRIC 846723X NSFP 846723X
RELIANCE ELECTRIC T56S1023A-GE USPP T56S1023AGE
RELIANCE ELECTRIC PSC3000 USPP PSC3000
RELIANCE ELECTRIC 0-51831-3 USPP 0518313
