Honeywell 51401996-100 EAMR 冗余电路板

Honeywell 51401996-100 EAMR

交流电压系统不关心极性问题。交流传感器和负荷通常不限制哪条线为带电的L1线或中性N线供电，因为它每秒钟会变换极性多次。

在这两种情况下，我们都必须面对采购/下沉的问题:

如果在任何控制设备中使用DC输入或输出端子。PLC、VFD、远程I/O模块等。

如果输入设备由晶体管构成，包括市场上几乎所有的三线式接近传感器、光电眼传感器和超声波传感器。

Honeywell 51401996-100 EAMR

The AC voltage system does not care about polarity issues. Communication sensors and loads typically do not limit which line is powered by a live L1 line or a neutral N line, as they change polarity multiple times per second.

In both cases, we must face the issue of procurement/sinking:

If DC input or output terminals are used in any control device. PLC, VFD, remote I/O modules, etc.

If the input device is composed of transistors, including almost all three wire proximity sensors, photoelectric eye sensors, and ultrasonic sensors on the market.