The main uses and parameters of DC electromagnetic relay sensor are explained in detail.airmax omni 5ghz 13dbi antenna

　　Electromagnetic relay is an electronic control device, generally composed of electromagnets, armature, spring pieces, contacts, etc., with control system and controlled system, usually used in automatic control circuit, in the circuit plays the role of automatic regulation, safety protection, conversion circuit and so on. Electromagnetic relays include DC electromagnetic relays, general electromagnetic relays, small electromagnetic relays and so on.

　　Applications: Electromagnetic relays are widely used in transportation, power distribution systems, automatic control, machinery manufacturing, defense systems, instrumentation and other fields.

　　The main parameters of small DC electromagnetic relay 1, coil DC resistance, refers to the resistance value of the coil measured by a multimeter.

　　(2) Rated working voltage or rated working current, which refers to the voltage or current value of the coil when the relay is working normally. Sometimes, the manual only gives the rated operating voltage or rated operating current, then you can use Ohm's law to calculate the given rated current or rated voltage value: that is, /=U/R, U=IxR, R is the DC resistance of the relay coil.

　　3, the suction voltage or current, it refers to the minimum voltage or current when the relay produces the suction. If only the pull voltage is applied to the coil of the relay, then the pull is not reliable. The general suction voltage is about 75[%] of the rated operating voltage.

　　4. Release voltage or current refers to the voltage value when the voltage at both ends of the relay is reduced to a certain value, and the relay is transferred from the suction state to the release state. The release voltage is much smaller than the suction voltage, and the general release voltage is 1/4 of the suction voltage.

　　5. Contact load refers to the voltage and current value that the contact of the relay can withstand when switching.

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