CN214898263U

CN214898263U - Dry contact control circuit structure for realizing low power consumption

Info

Publication number: CN214898263U
Application number: CN202121418838.4U
Authority: CN
Inventors: 许金峰
Original assignee: Simon Electric China Co Ltd
Current assignee: Simon Electric China Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-11-26
Anticipated expiration: 2031-06-25

Abstract

The utility model relates to a realize dry contact control circuit structure of low-power consumption, including working power supply module, drive control power module and first resistance, circuit structure be connected with outside relay, working power supply module connect operating voltage VCC, drive control power module connects driving voltage VDD, working power supply module and drive control power module through first resistance coupling, first resistance restriction power to driving voltage VDD's charging current. The utility model discloses a realize the dry contact control circuit structure of low-power consumption, the utility model discloses a resistance current-limiting reduces the product current demand, the utility model discloses a electric capacity discharges in the twinkling of an eye, and normal control magnetic latching relay actuation or disconnection, the utility model discloses contain simple and practical's detection circuitry that resets, and the electricity of losing can reset, and is the same with electromagnetic relay usage, reduces system power consumption, can satisfy a plurality of switches and use simultaneously; the relay actuation does not influence the normal power supply, and the product stability is high.

Description

Dry contact control circuit structure for realizing low power consumption

Technical Field

The utility model relates to a RCU weak current control field especially relates to dry contact control field, specifically indicates a dry contact control circuit structure who realizes the low-power consumption.

Background

The utility model relates to a dry contact control circuit of low-power consumption, the wide application is in the dry contact output product of light current control class such as hotel controllable system RCU. The common control device of the present dry contact control product is a common electromagnetic relay, a certain voltage is applied to two ends of a coil, a certain current flows in the coil, so that an electromagnetic effect is generated, and an armature overcomes the pulling force of a return spring and is attracted to an iron core under the action of electromagnetic force attraction, so that a movable contact and a fixed contact (normally open contact) of the armature are driven to be attracted. The consumed current is large, and the system power supply is easy to be insufficient.

The power consumption of the electromagnetic relay is generally 0.2W or 0.36W, 16 milliamperes or 30 milliamperes current is consumed in a 12V system to maintain the pull-in state of the relay, and the situation of insufficient power supply of the system is easily caused when a plurality of dry contact switches are used in the system.

To the product defect in the existing market, the utility model discloses a shortcoming among the above-mentioned prior art has been overcome to the purpose of the utility model, provides a novel magnetic latching control technique, utilizes electrolytic capacitor drive magnetic latching relay that discharges in the twinkling of an eye, only needs lower electric current just can make the product normally work, reduces power loss.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of above-mentioned prior art, providing a satisfy easy and simple to handle, power loss is low, application scope comparatively extensive realization low-power consumption's dry contact control circuit structure.

In order to achieve the above object, the utility model discloses a realize dry contact control circuit structure of low-power consumption as follows:

this realize dry contact control circuit structure of low-power consumption, its key feature is, circuit structure include working power supply module, drive control power supply module and first resistance, circuit structure be connected with outside relay, working power supply module connect operating voltage VCC, drive control power supply module connects driving voltage VDD, working power supply module and drive control power supply module pass through first resistance and connect, first resistance restriction power to driving voltage VDD's charging current.

Preferably, the circuit structure controls the ON pin to output a high level under the condition of controlling the relay to be attracted, the capacitor of the drive control power supply module discharges instantly to attract the magnetic latching relay, and the drive control power supply module charges through the first resistor to fully charge the capacitor of the drive control power supply module; the circuit structure controls the OFF pin to output high level under the condition that the relay is disconnected, the capacitor of the drive control power supply module discharges instantly to disconnect the magnetic latching relay, and the drive control power supply module charges through the first resistor to fully charge the capacitor of the drive control power supply module.

Preferably, the circuit structure further includes a reset detection pin, which is connected to the reset detection signal to detect whether the reset detection pin is at a high level before controlling the ON pin, and if so, the ON pin is triggered to operate, and if so, the circuit structure is powered off, and the ON pin does not operate.

Preferably, the circuit structure continuously detects whether the reset detection pin is at a high level or not in a state that the ON pin outputs the high level, and the switch state is unchanged if the reset detection pin is at the high level; if the voltage is low level, the circuit structure loses power, the OFF pin is controlled to output high level, and the relay is kept to reset.

The utility model discloses a realize the dry contact control circuit structure of low-power consumption, the utility model discloses a resistance current-limiting reduces the product current demand, the utility model discloses a electric capacity discharges in the twinkling of an eye, and normal control magnetic latching relay actuation or disconnection, the utility model discloses contain simple and practical's detection circuitry that resets, and the electricity of losing can reset, and is the same with electromagnetic relay usage, reduces system power consumption, can satisfy a plurality of switches and use simultaneously; the relay actuation does not influence the normal power supply, and the product stability is high.

Drawings

Fig. 1 is a circuit diagram of the prior art.

Fig. 2 is a circuit diagram of the dry contact control circuit structure for realizing low power consumption according to the present invention.

Detailed Description

In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.

The utility model discloses a this realize dry contact control circuit structure of low-power consumption, including working power supply module, drive control power module and first resistance, circuit structure be connected with outside relay, working power supply module connect operating voltage VCC, drive control power module connects driving voltage VDD, working power supply module and drive control power module through first resistance coupling, first resistance restriction power to driving voltage VDD's charging current.

As a preferred embodiment of the present invention, the circuit structure controls the ON pin to output a high level under the condition of controlling the actuation of the relay, the capacitor of the driving control power module discharges instantaneously to actuate the magnetic latching relay, and the driving control power module charges through the first resistor to fully charge the capacitor of the driving control power module; the circuit structure controls the OFF pin to output high level under the condition that the relay is disconnected, the capacitor of the drive control power supply module discharges instantly to disconnect the magnetic latching relay, and the drive control power supply module charges through the first resistor to fully charge the capacitor of the drive control power supply module.

As the utility model discloses a preferred embodiment, circuit structure still including the detection pin that resets, connect the detection signal that resets, before the control ON foot, detect whether the detection pin that resets is the high level, if trigger the ON foot action for the high level, if for the low level then circuit structure loses electricity, ON foot action does not carry out.

As a preferred embodiment of the present invention, the circuit structure continuously detects whether the reset detection pin is at a high level when the ON pin outputs the high level, and the ON/off state is unchanged if the reset detection pin is at the high level; if the voltage is low level, the circuit structure loses power, the OFF pin is controlled to output high level, and the relay is kept to reset.

The utility model discloses an among the embodiment, overcome the shortcoming among the above-mentioned prior art, provide a novel magnetic latching control technique, utilize electrolytic capacitor drive magnetic latching relay that discharges in the twinkling of an eye, only need lower electric current just can make the product normally work, reduce power loss.

In order to achieve the above purpose, as shown in fig. 2, the main circuit structure of the present invention is shown in the dashed line. The utility model discloses a relay electrical control circuit device falls into two parts with the power: a working power supply section VCC and a drive control power supply section VDD. VCC is consumed current for normal standby operation, VDD is a driving control part which is the maximum current consumption part of the dry contact switch, an R1 resistor is selected to be a resistor of 10K-100K, the charging current of a 12V power supply to VDD can be limited due to the resistor, and after the VDD is fully charged, the current cannot be consumed. The whole switch is in a micro current consumption state. When the relay needs to be controlled to be attracted, the MCU controls the ON pin to output a high level of 16 milliseconds, and the VDD capacitor discharges instantly to enable the magnetic latching relay to be attracted. VDD is then charged through R1, the VDDD capacitor can be fully charged in a short time without increasing current consumption.

Similarly, when the relay is switched OFF, the MCU controls the OFF pin to output a high level of 16 milliseconds, and the VDD capacitor discharges instantaneously to switch OFF the magnetic latching relay. VDD is then charged via R1 and the VDDD capacitor is fully charged in a short time.

The MCU-IN is a reset detection signal, before ON action, whether the MCU-IN is high level or not is detected, if so, the ON action can be triggered, and if so, the system is considered to be power-off, and the ON action is not executed. When the relay is IN an ON state, continuously detecting whether the MCU-IN is at a high level, and if so, keeping the switch state unchanged. If the voltage is low, the system is considered to be power-OFF, the MCU controls OFF action, and the magnetic latching relay is reset under the condition that VCC and VDD have residual power. Namely: the relay can be reset under any condition when the power supply is out of power.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. The utility model provides a realize dry contact control circuit structure of low-power consumption, a serial communication port, circuit structure include operating power supply module, drive control power module and first resistance, circuit structure be connected with outside relay, operating power supply module connect operating voltage VCC, drive control power module connects driving voltage VDD, operating power supply module and drive control power module pass through first resistance and connect, first resistance restriction power to driving voltage VDD's charging current.

2. The dry contact control circuit structure for realizing low power consumption according to claim 1, wherein the circuit structure controls the ON pin to output a high level under the condition of controlling the actuation of the relay, the capacitor of the driving control power supply module is instantaneously discharged to actuate the magnetic latching relay, and the driving control power supply module is charged through the first resistor to fully charge the capacitor of the driving control power supply module; the circuit structure controls the OFF pin to output high level under the condition that the relay is disconnected, the capacitor of the drive control power supply module discharges instantly to disconnect the magnetic latching relay, and the drive control power supply module charges through the first resistor to fully charge the capacitor of the drive control power supply module.

3. The dry contact control circuit structure for realizing low power consumption of claim 1, wherein the circuit structure further comprises a reset detection pin, the reset detection pin is connected with a reset detection signal to detect whether the reset detection pin is at a high level before controlling the ON pin, if so, the ON pin is triggered to operate, and if so, the circuit structure is powered off, and the ON pin does not operate.

4. The dry contact control circuit structure for realizing low power consumption according to claim 1, wherein the circuit structure continuously detects whether the reset detection pin is at a high level when the ON pin outputs a high level, and the switch state is unchanged if the reset detection pin is at the high level; if the voltage is low level, the circuit structure loses power, the OFF pin is controlled to output high level, and the relay is kept to reset.