The Relay Shield 4x(4 relay)- enables you to manage consumer devices connected to the network 220V, switching power equipment: motors, pumps. Total have 4 relays with switching characteristics: AC 250V-10A, DC 60V-10A.
Normaly relay is that it separates the control channels and traffic channels. That gives protection to your microcontroller. But there is no guarantee of protection from very high currents.
For Relay Shield need external power supply 6-12V. For Relay Shield, use current about 400mA. With a jumper you can switch the power supply from an external to Vin board Arduino.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.99 inch
Height : 2.01 inch
Length : 4.02 inch

Item Weight: 0 ounce (View shipping rates and policies)
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ASIN : B071FWG63B