Gravity: 4 Channel Relay Shield for Arduino

DFRobotSKU: DFR0144
Sale price £13.40
incl. VAT
excl. VAT
Only 7 units left

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This Relay Shield for Arduino acts like a switch. It is commonly used to control anything over 5V such as lamps, water pumps and garage doors.

One of the most interesting projects for your boards is perhaps being able to control High power devices like Lamps, water pumps, garage doors and so on. But interfacing with high power is quite a dangerous task when building the circuitry. Relays allow for interfacing an external electrical circuit like a switch. With relays, you can now connect external circuits or devices directly to your Arduino.

This Arduino Shield is a completely newly designed that is able to control 4 relays at a time. The max switching power DC 90W or AC 360VA gives direct control by Arduino Uno/DFRduino controllers through digital I/Os with external 9V supply. With built-in Xbee socket, it can be wireless remote controlled via Xbee/bluetooth/WPM.

This arduino relay shield is an ideal solution for home automation and robotics applications.

Note: The Arduino board requires an external power supply to drive the xbee module and relays.

Warning: Pay attention to the voltage that is over 38 volts.


  • Compatible with Arduino UNO Rev3
  • Each relay has its own test button to test the connection
  • Standard DFRobot 3 Pin out
  • XBee I/O direct control


  • Compatible with Arduino Rev3
  • 4 buttons to test module
  • LED status indicator of relay
  • Support Xbee IO directly control
  • Xbee socket for wireless communication
  • Selectable digital IO pin for control (Default digital 2,7,8,10)
  • 6 channels Analog IO & 13 channels Digital IO
  • Up to 4 Relay with photo-coupled circuit
  • Contact Rating 3A AC 120V / DC 24V
  • Max Switching Voltage AC 240V / DC 60V (Less than 38V is recommended)
  • Max Switching Current 5A
  • Max Switching Power AC 360VA / DC 90W
  • Electrical Life (Min) 100,000 Operations
  • Mechanical Life (Min) 10,000,000 Operations
  • Safety Standard(relay) UL cUL TUV CQC
  • Coil Working Voltage 9VDC
  • Working temperature -30°C to +85°C
  • Working Humidity 40% - 85%
  • Size: 95 x 65mm




Pin Pin State: HIGH Pin State: LOW
Digital 2 NC1 is disconnected with COM1 NC1 is connected with COM1
NO1 is connected with COM1 NO1 is disconnected with COM1
Digital 7 NC2 is disconnected with COM2 NC2 is connected with COM2
NO2 is connected with COM2 NO2 is disconnected with COM2
Digital 8 NC3 is disconnected with COM3 NC3 is connected with COM3
NO3 is connected with COM3 NO3 is disconnected with COM3
Digital 10 NC4 is disconnected with COM4 NC4 is connected with COM4
NO4 is connected with COM4 NO4 is disconnected with COM4
Note: NC: Normally Closed; NO: Normally Open.

Package Contents

  • 1x Relay Shield for Arduino V2.1
  • 2x Nylon stand-off with screw

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