Classification and application of RF sensors for AC electromagnetic relays

　　Ac electromagnetic relay RF sensor classification is the use of low voltage, weak current circuit on and off to indirectly control high voltage, strong current circuit device. 4, AC electromagnetic relay RF sensor classification structure includes electromagnet, armature, reed, contact. The working circuit is composed of two parts: low voltage control circuit and high voltage working circuit. 5, the speaker is used to convert electrical signals into acoustic signals. The structure is mainly composed of fixed permanent magnets, coils and conical paper POTS.

　　Its principle is: through the coil carrying sound information, time to change the current, so that in one moment and the next moment to produce a different direction of the magnetic field, the coil will continue to vibrate back and forth, the paper basin will vibrate, it issued a sound.

　　Device introduction

　　When the input (such as voltage, current, temperature, etc.) reaches the specified value, the relay RF sensor is switched on or off by the output circuit controlled.

　　The input can be divided into two categories: electrical (such as current, voltage, frequency, power, etc.) and non-electrical (such as temperature, pressure, speed, etc.).

　　Relay RF sensor has the advantages of fast action, stable operation, long service life and small size. Widely used in power protection, automation, motion, remote control, measurement and communication devices.

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