DFRobot
4 Channel Arduino Relay Shield
This 4-channel relay shield from DFRobot plugs directly onto an Arduino Uno or compatible board, providing opto-isolated relay switching for controlling high...
This 4-channel relay shield from DFRobot plugs directly onto an Arduino Uno or compatible board, providing opto-isolated relay switching for controlling high-power devices such as lamps, water pumps, and motors. Each relay has its own test button and LED status indicator.
The shield features a built-in XBee socket for wireless remote control via XBee, Bluetooth, or WPM modules. The relay control pins are selectable (default: digital 2, 7, 8, 10), and an external 9V power supply is required to drive the relays and XBee module.
Key Features
- 4 Relay Channels – Opto-isolated for safe microcontroller interfacing
- Arduino Uno Compatible – Plugs directly onto Rev3 boards
- XBee Socket – Built-in support for wireless remote control
- Test Buttons – Individual test button for each relay
- LED Indicators – Status LEDs show relay state
- Selectable Control Pins – Default digital 2, 7, 8, 10
Specifications
- Contact Rating – 3A @ 120V AC / 24V DC
- Max Switching Voltage – 240V AC / 60V DC (below 38V recommended)
- Max Switching Current – 5A
- Max Switching Power – 360VA AC / 90W DC
- Coil Voltage – 9V DC
- Electrical Life – Min 100,000 operations
- Mechanical Life – Min 10,000,000 operations
- I/O – 6 analogue + 13 digital channels
- Operating Temperature – −30°C to +85°C
- Operating Humidity – 40–85%
- Safety Standards – UL, cUL, TUV, CQC
- Dimensions – 95 × 65mm
Ideal For
- Home automation systems
- Robotics and motor control
- Wireless relay switching via XBee
- Arduino-based switching projects
Package Contents
- 1× Relay shield for Arduino V2.1
- 2× Nylon standoffs with screws
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Shield
- An add-on board that plugs into a main controller board to give it extra features such as sensing, motor control or communication. Knowing a product supports shields helps you judge whether it can connect neatly into an existing maker-board setup.
Find this product in
Brands
Supplier page — dfrobot.com
Supplier Description · 777.1 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
