Controller of outputting circuit for relay

A relay output and controller technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of complex working conditions of peripheral working circuits, accidents, poor reliability of relays, etc.

Inactive Publication Date: 2005-12-28

江苏苏亚机电制造有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Due to the relatively poor working reliability of the relay, and the complicated working conditions of the peripheral working circuit it controls, the contacts of the relay are stuck due to...

Abstract

The invention consists of SCM. One output end of SCM is connected with coil of relay. The one of contacts of replay is connected with peripheral working circuit. Another output end of SCM is connected with system failure discrimination circuit. The system failure discrimination circuit consists of another contact of relay and resistor R. Another contact of relay is connected in series with resistor R.

Application Domain

Emergency protective circuit arrangements

Technology Topic

System failureResistor +2

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Examples

Experimental program(1)

Example Embodiment

[0009] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0010] Contains a single-chip microcomputer, an output terminal of the single-chip microcomputer and relay K A The line package is connected, relay K A Set of contacts K 1 Connected to the peripheral working circuit, the other output terminal of the single-chip microcomputer is connected with a system fault discrimination circuit. System failure judgment circuit contains relay K A Another set of contacts K 2 And resistance R, relay K A Another set of contacts K 2 One end of and one end of resistor R are connected in series and then connected to the microcontroller, relay K A Another set of contacts K 2 The other end of the resistor R is connected to a 5 volt power source, and the other end of the resistor R is grounded. When the controlled circuit requires relay K A Set of contacts K 1 When switched on, the single-chip microcomputer outputs voltage so that the relay K A Set of contacts K 1 And another set of contacts K 2 closure. At this time, the microcontroller starts to A Another set of contacts K 2 The closed state is detected, when the microcontroller finds the relay K A Another set of contacts K 2 When it fails, it is preliminarily determined that relay K A Set of contacts K 1 Is not connected, the alarm signal will be output in time, and the relay K will be cut off. A The output voltage. When the controlled circuit requires relay K A Set of contacts K 1 When disconnected, the microcontroller cuts off the relay K A The output voltage makes the relay K A Set of contacts K 1 And another set of contacts K 2 disconnect. At this time, the microcontroller starts to A Another set of contacts K 2 The disconnection state of the MCU is detected, when the microcontroller finds the relay K A Another set of contacts K 2 When still connected, it is preliminarily determined that relay K A Set of contacts K 1 It cannot be disconnected, and the alarm signal will be output in time. The MCU model selected in this embodiment is 89C51, and the relay K A The model is JQF-22, and the value of resistance R is 10kΩ.

PUM

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