An in-line normally open electronic intermediate relay universal for AC and DC

Abstract

The invention discloses a direct-plug normally-opened electronic intermediate relay for AC and DC, and belongs to the technical field of relays. The relay is characterized in that the interior of a housing (1) is provided with a control circuit; the control circuit comprises a power input unit, a high-frequency oscillation module, a signal isolation module and an electronic switch module, whereinthe power input unit, the high-frequency oscillation module, the signal isolation module and the electronic switch module are connected sequentially; a triggering signal is connected to the input endof the power input unit, and the output end of the electronic switch module is a wiring end of the normally-opened contact, wherein the triggering signal is a DC signal or an AC signal; the normally-opened contact is connected to a DC loop or an AC loop; the rear end face of the housing (1) is provided with a plurality of pins (2) cooperating with an intermediate relay pedestal; a triggering signal input end and the wiring end of the normally-opened contact are connected with the pins (2). The relay provided by the invention can achieve free drive of a DC or AC load through a DC or AC drive signal, and greatly improves the applicability of the electronic relay.

Description

technical field [0001] The utility model relates to an in-line normally open electronic intermediate relay common to AC and DC, which belongs to the technical field of relays. Background technique [0002] The intermediate relay is a commonly used electrical component in the industrial field. Its main function is to increase the number and capacity of contacts in the relay protection and automatic control system, and to transmit intermediate signals in the control circuit. In the prior art, the intermediate relays are generally conventional mechanical structures, which are mainly composed of fixed iron core, moving iron core, spring, moving contact, static contact, coil, terminal and shell, etc. The main working principle is as follows: : When a voltage is applied to the relay coil and is equal to or greater than the operating voltage, the armature is attracted by the electromagnetic force against the iron core, and the contact piece is pushed by the top plate of the armatur...

AI Technical Summary

Problems solved by technology

[0005] (1) The existing "electronic switch" products are divided into two types: DC type and AC type according to the power supply type of the load. The input signal of " and the power supply in the power supply circuit of the load must be AC, that is, the working mode of the "electronic switch" is the mode of AC control AC, once the input power of the "electronic switch" and the power supply type of the load become DC, Then the AC type "electronic switch" cannot work normally, and the DC type "electronic switch" is the same

Therefore, the existing "electronic switch" has poor applicability. Once the load type changes, the "electronic switch" and even the driving power of the "electronic switch" also need to be changed accordingly, which greatly increases the difficulty of system transformation and brings great harm to industrial applications. extremely inconvenient

It also largely limits the development of electronic relays

[0006] (2) The existing "electronic switch" products are generally large in size because they have to carry a large passing current, and cannot be directly plugged into the base of the intermediate relay to replace the conventional mechanical intermediate relay.

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