A 12V 4 channel relay interface board designed to control high voltage, high current loads such as solenoid valves, motor, lamps, and AC load. The 4 channel 12V relay module with light coupling provides isolation grooves on the control area and load Areas. The 4 channel 12V relay requires 50-60 milliampere driver current for each relay. The relay terminal Common(C), normally open (NO), normally closed NC) accessed through the screw terminals thus makes wiring much easier. This interface board can be controlled directly by the microcontroller (Arduino, AVR, PIC, MSP430, DSP, 8051, TTL logic). This is used in both industrial and household applications. The inputs of the 4 channel 12v relay module isolated in order to protect any delicate control circuitry. The risk of heating up of relay avoided by such high voltage relay thus limit current consumption in accordance with the voltage rating.
This 4 Channel Relay Module provides connections for all 3 terminals of the relay i.e. NO, NC, and COM. There exist 2 LEDs on the relay module in which red indicates the status of the relay and green for power. When the input digital signal switches to high, the relay switched ON (closed), else remains to switch OFF (opened). This module also used to control various applications and equipment with a large current compliant with international safety.
This Relay circuit defined as a small and easy-to-use 4 channel relay board that operates on 12V. This 4-channel relay module widely used to control one 240V power appliance directly from Arduino, Raspberry Pi, and other microcontrollers or low voltage circuits. In short, it Perfect for switching 240V appliances – lights, fans, etc, and even high power motors at lower voltages.