Description

2 Channel 5V Relay Module is an interface board and can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, and so on. With digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs.

This module is designed to be integrated with 2 relays that it is capable of controlling 2 relays. 5V 10A 2 Channel Relay Module Shield for Arduino ARM PIC AVR DSP Electronic relay is a 24V 2-channel relay interface board. If you have ever had a project that required an interface with a high-power device that needed AC or DC voltage and high current levels you have probably already discovered that attempting to control those devices directly with your Arduino, Raspberry PI or other Microcontrollers/Microprocessors can be a real challenge. This board is designed to interface easily with your 5V IOs without consuming much current on your IO pins.

Features: 5V Dual Channel Relay Module

It can control both AC and DC appliances such as Solenoids, Motors, lights, fans, etc
High-quality screw terminals (Terminal Block) provided (C, NC, NO) for quick and easy connection
A freewheeling diode to protect your microcontroller
Input Signal Pin connected to Burg stick for easy accessibility led status indicators to indicate the relay ON/OFF status
Mounting holes provided
Signal input with a high-level signal, the common and often start conduction
The relay can directly control all kinds of equipment and load

Specifications: 5V Relay Module 2 Channel

Channel – 2
Operating Voltage(VDC) – 5V
Current Capacity at AC250V – 10A
Current Capacity at DC30V – 10A
Dimensions: Length×Width×Height (mm)=34×50×16

Pin Description:5V Relay module dual Channel

C=Common: This is the common terminal. This terminal will be connected to either of other 2 terminals (NO or NC) based on the state of the relay.
NO=Normally Open: As the name indicates this is a normally open terminal, i.e. if the relay is not energized (not ON), this pin will be open. We can say that the switch is OFF by default and when the relay is energized it will become ON.
NC=Normally Close: As the name indicates it is a normally closed terminal, i.e. if the relay is not energized (not ON), this pin will be closed. We can say that the switch is ON by default and when the relay is energized it will become OFF.

How To Word on 5V Dual Channel Relay Module

The dual-channel relay module can be used to switch mains-powered loads from the pins of the microcontroller. Since there are two channels on the same board, two separate loads can be powered. This is useful for home automation.

The loads can be connected as follows:

In this diagram, the relay on the left (channel 1) is connected in a regular fashion with the load and source going between common and normally open, so when the relay is activated, the load is powered. On the right channel (channel 2), the load and source are connected between common and normally closed, which means that the load is powered by default till the relay is activated.

If the load is connected to the normally closed contact, then the input polarity ‘reversal’ can be fixed – the load is powered on when the input is high, and the load is powered off when the input is low. This method, however, wastes some current since the relay coil draws current when the load is switched off.

Dual-Channel Relay Module Basic Troubleshooting

If either of the relays does not turn on:

The contacts might be welded due to overcurrent/arcing. Shaking the module firmly might help unstick the contacts
The driver circuitry might have been damaged due to overvoltage.
Input polarity might be incorrect.
The jumper might not have been moved to the correct position.