Double-lamp indicating solid-state relay

Abstract

The invention discloses a double-lamp indicating solid-state relay, which comprises a control signal input module, an input indication module, an optocoupler triggering control circuit and an output indication module, wherein the optocoupler triggering control circuit and the output indication module are connected with a load circuit; the load circuit comprises a load power supply, a load and two parallelly connected diodes; one diode is directly connected with the optocoupler triggering control circuit; and the output indication module is arranged between the other diode and the optocoupler triggering control circuit. The double-lamp indicating solid-state relay has a simple structure; by the double-lamp indicating solid-state relay, the operating state of a product can be clearly judged; and in addition, due to a resistance-capacitance (RC) absorption protection circuit and the photoelectric isolation of input and output, a circuit can safely and reliably work, and can be switched on / off for hundreds of millions of times, and zero-current switching-off and non-contact switching-on / off can be realized.

Description

technical field [0001] The invention relates to the field of solid-state relays, in particular to a double-light indicating solid-state relay that can be applied to the protection of air-conditioning compressors and places where the power supply voltage is unstable. Background technique [0002] At present, the power supply is the power supply equipment of all electronic products. In addition to the performance that meets the requirements of the power supply products, its own protection measures are also very important. Once an electronic product fails, the power supply must turn off its output voltage to ensure that the electrical appliance will not be burned, otherwise it may cause further damage to the electronic product, and even cause electric shock and fire for the operator. For this phenomenon, generally use The solid-state relay protects the power supply or the load. However, the general solid-state relay has a disadvantage, that is, when the semiconductor device is ...

AI Technical Summary

Problems solved by technology

Once an electronic product fails, the power supply must turn off its output voltage to ensure that the electrical appliance will not be burned, otherwise it may cause further damage to the electronic product, and even cause electric shock and fire for the operator. For this phenomenon, generally use The solid state relay protects the power supply or the load. However, the general solid state relay has a disadvantage, that is, when the semiconductor device is turned off, there may still be a leakage current of several microamps to several milliamps, so ideal electrical isolation cannot be achieved.

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