The high and low temperature impact test box relay is suitable for different central signal wiring methods, no matter it is connected to the positive or negative terminal of the power supply, there is no need to set a jumper.
The high and low temperature impact test box relay consumes very little power and does not require an external resistor.
The high and low temperature impact test box relay completely eliminates the traditional current differential principle and adopts the method of intelligent comparison of current amplitude during the entire period of the alarm. It has memory characteristics, that is, it remembers the amplitude of the current before the alarm time comes and compares the alarm current. Before and after the moment, if the long signal overlaps with the short signal, during the delay period of the pre-announced signal, as long as the long signal does not return to ensure correct alarm, the long signal will not be "erased" by the short signal. In addition, it can have a strong ability to suppress the changes of the thermal resistance of the filament of the incandescent lamp, the ripple of the power supply and the jitter of the contact, ensuring the correct action of the product. The delay time element and the alarm timing time element with a delay notice signal are included, and the two external time relays can be omitted. When the alarm is called, in addition to manually resetting the sound, the sound is automatically released through the timing circuit.
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