16A Relay Module(SKU:DFR0251)

Contents

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1 Introduction

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2 Specification

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3 Relay Module Pinout

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4 Test Connection Diagram

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5 Sample Code

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6 Plugging in an appliance

Introduction

A relay is an electrically operated switch, which has a control system (also known as the input

circuit) and the controlled system (also known as the output circuit), usually used in automatic

control circuit.It is actually "automatic switch" ,using a small electric current to control a larger

current.Therefore, the relay has the effects on the automatical automatic adjustment, security,

conversion circuit in the circuit and so on .

Relays are used where it is necessary to control a circuit by a low-power signal (with complete

electrical isolation between control and controlled circuits), or where several circuits must be

controlled by one signal.