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Keyestudio Relay 4 channel 5V Shield Module KS0251

Keyestudio Relay 4 channel 5V Shield Module KS0251

The Keyestudio Relay Shield is a 4-channel 5V relay module designed for easy integration with the Arduino UNO R3 control board. It allows you to control high-current appliances and devices directly from your Arduino, using digital pins D4, D5, D6, and D7. Each relay is active HIGH, making control as simple as writing HIGH or LOW to the pin. With onboard LED indicators for each relay and a compact, durable design, this shield is perfect for home automation, IoT applications, robotics, and industrial projects.

Package Includes

  • 1 x Keyestudio 4-Channel Relay Shield

Relay Shield
72.45 AED 72.45 AED (Tax included)

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Features

  • 4 Active HIGH Relays: Controlled via Arduino digital pins D4–D7.
  • Contact Capacity: Supports up to AC 120V/3A or DC 24V/3A.
  • Onboard LED Indicators: Red LEDs show relay ON/OFF status.
  • UNO R3 Compatibility: Designed for direct stacking with Arduino boards.
  • Durable Build: Black PCB with 3 M3 mounting holes for secure installation.
  • Compact Design: Space-saving layout with sleek aesthetics.
  • Power Input: Operates on 5V DC.

Specifications

Specification Details
Relay Type 4-channel, 5V (active HIGH)
Contact Capacity AC 120V/3A; DC 24V/3A
Indicators 4 red LEDs (relay status)
Power Input 5V DC
Compatibility Arduino UNO R3
Dimensions 69mm x 54mm x 26mm
Weight 39.4g
PCB Color Black

Pinout

Relay Shield Pinout

  • D4, D5, D6, D7: Digital control pins for relays 4, 3, 2, and 1 respectively.
  • 5V and GND: Power and ground for the relay module.

Relay Logic Table

Digital Pin Relay LED Status COM & NO COM & NC
D4 Relay 4 ON: LED4 lit
OFF: LED4 off		 ON: Connected
OFF: Disconnected		 ON: Disconnected
OFF: Connected
D5 Relay 3 ON: LED3 lit
OFF: LED3 off		 ON: Connected
OFF: Disconnected		 ON: Disconnected
OFF: Connected
D6 Relay 2 ON: LED2 lit
OFF: LED2 off		 ON: Connected
OFF: Disconnected		 ON: Disconnected
OFF: Connected
D7 Relay 1 ON: LED1 lit
OFF: LED1 off		 ON: Connected
OFF: Disconnected		 ON: Disconnected
OFF: Connected

Important Notes

  • COM & NO (Normally Open): Connect when relay is ON (HIGH).
  • COM & NC (Normally Closed): Connect when relay is OFF (LOW).
  • LED Indicators: Each relay has an LED showing activation status.

Applications

  • Home automation systems
  • Industrial equipment control
  • IoT projects
  • Remote appliance management
  • Robotics and prototyping