brief introduction： Control relay is a kind of automatic electrical appliances, it is suitable for remote connection and disconnection, DC small capacity control circuit, and in the electric drive system for control, protection and signal conversion. The input of the control relay is usually electric quantity such as current and voltage, and can also be non-electric quantity such as temperature, pressure and speed. The output is the electric signal sent out during the action of the contact or the parameter change o

Control/Monitor

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