12V 2Ch Relay Module with Optocoupler

12V 2Ch Relay Module with Optocoupler is a small and easy to use and subsequently it can be used to control one 240V power appliance directly from Arduino, Raspberry Pi, and other microcontrollers or low voltage circuits. Perfect for switching 240V appliances – lights, fans, etc, and even high power motors at lower voltages.

The board uses a high-quality relay however it can handle a maximum of 7A/250 V AC or 10A/125V AC. Each relay has all three connections Common, Normally Open, Normally Closed markedly brought out to 3 pin screw terminals which can make it easy to make and remove connections. The board has a relay status LED i.e. to ease debugging. The board can accept control inputs within a wide range of voltages undeniably from 4V to 12V.

Relays were first used in long-distance telegraph circuits as signal repeaters they refresh the signal coming in from one circuit by transmitting it on another circuit. Further more the telephone exchanges and also the early computers extensively employed relays to perform logical operations

Also electrical relays got their start in application to telegraphs. American scientist Joseph Henry is often cited to have invented a relay in 1835 in order to improve his version of the electrical telegraph, developed earlier in 1831.However, an official patent was not issued until 1840 to Samuel Morse for his telegraph, which is now called a relay.

Features of 12V 2Ch Relay Module:

• Relay Voltage 12V
• Channels = 2
• Optically Isolated = YES
• TTL interface to trigger the relay
• Relay Current handling capacity = 7A @ 250V AC
• Relay Type Sugar Cube
• Relay Contacts NO, NC and Common.
• Standard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM)

Package Includes:

1 x 12V 2Ch Relay Module with Optocoupler