报警输出：常开常闭信号，控制排风扇，电磁阀信号。

Alarm output: frequent on or off signal, control exhaust fan, electrical magnetic valve signal.

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原理：常闭型直动式电磁阀通电时，电磁线圈产生电磁吸力把阀芯提起，使关闭件离远开阀座密封副打开；

Principle: when the power is on, the electromagnetic force of the electromagnetic force to shut off the valve seat, the valve open;

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2位2通常闭电磁阀，拥有流量调节功能，适用于液体介质。

2/2way, with flow control, Applyin water and other liquid.

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