Description

1. Overview

LC 5A Over-current protection Sensor moduleuses current transformer to collect the AC signal to achieve the relay over-current signal output within 0-5A. Relay pull while over-current, relay released while not over-current. Users can use the relay COM, NC, NO three ports to control the external circuit on and off, in order to achieve over-current protection.

2.The function and characteristics

1, Operating voltage: DC12V;

2,  Operating current: <20MA;

3,  Operating frequency range: 20Hz ~ 400Hz

4,  Output mode: switch signal output;

5,  Maximum detection wire diameter: 5.2mm;

6,  Mounting hole: hole diameter is 3mm, hole distance is 52.5mm;

7,  Operatingenvironment: -40 ℃ ~ +85 ℃;

8,  Current detection resolution can change the parameter of resistance parameters;

9,  Output over-current switching signal output;

10, Over-current signal setting critical point adjustable, the current detection range AC0.3A-5A;

3. Introduced the hardware and instructions

Board size: 38 * 44mm

The board function description:

The interface description:

VCC: Operating voltage positive;

GND:Operating voltagenegative;

NO: Normally open, the relay pulls before the NO and COM disconnect, short-circuit after the suction;

COM: common, relay common interface;

NC: Normally closed, the relay before the NC and COM short-circuit, pull off after;

Using instructions:By setting the potentiometer to set the overcurrent protection point, the clockwise adjustment reduces the detection current.

As bellows:

1， Measured the wire through the current transformer , connect VCC and GND to DC12V power supply;

2, Adjust the potentiometer, when you hear the sound of the relay pull (can be measured with a multimeter COM and NO whether was turned on, if connected to the relay means activated), then reduce or cut off the current flowing  that through the tested wire , if the relay release at this time that over-current protection point has been identified (available to multimeter COM and NC measurement whether is connected, if connected to the relay means been released);

3, When reduce or cut off the current flowing through the wire , the relay is not released, will still need to continue to adjust the potentiometer to find the over-current protection point.