GE Energy IS220PPRFH1B 光耦合隔离模块

GE Energy IS220PPRFH1B

一个小LED指示继电器板的输入电压，这提供了一些信息。

当PLC输出通电时，LED明亮，继电器发出明显的“咔嗒”声。

当PLC输出断电时，继电器板上的LED指示灯会变暗，某些模块会完全熄灭。在许多情况下，继电器保持通电。

测量继电器输入端的电压，显示“开”时为23.8伏，而“关”时为2.2伏——后者应足以使继电器断电。

进一步的数据表研究表明，继电器板模块在输入端子和实际继电器线圈之间有一个光耦合隔离。

GE Energy IS220PPRFH1B

由于这些光耦合器器件在工业设备的隔离中非常常见，我想了解更多信息，并弄清楚这种情况为何没有达到预期效果。

你们中的许多人可能已经正确预测了这次失败的原因。

A small LED indicates the input voltage of the relay board, which provides some information.

When the PLC output is powered on, the LED is bright and the relay emits a noticeable “click” sound.

When the PLC output is powered off, the LED indicator light on the relay board will dim, and some modules will completely turn off. In many cases, the relay remains energized.

Measure the voltage at the input terminal of the relay, which shows 23.8 volts when “on” and 2.2 volts when “off” – the latter should be sufficient to power off the relay.

Further data table research indicates that the relay board module has an optical coupling isolation between the input terminal and the actual relay coil.