With this  Relay module,  will have the ability to control  high voltage and current appliances, a with a current no more than,10A (250VAC/60VDC).It can be controlled directly by microcontroller: Raspberry, Arduino, AVR, PIC, DSP, ARM or TTL logic.For control of module need power 5V and logic operation 3.3V/5V.For isolate the microcontroller from the Relay, we added optocoupler. Now with this configuration, the microcontroller doesn’t have any physical connection with the Relay, it just uses the LED light of the Optocoupler IC to activate the Relay. This solution saves your microcontroller from a high voltage for VAC/VDC.

• 5V 4-channel Relay interface board, and each one needs 15-20mA Driver Current
• Equiped Equipped with high-current Relay, AC250V 10A ; DC30V 10A
• Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic active low)
• Opto-isolated inputs