Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when arelay contact is normally open (NO), there is an open contact when the relay is not energized.
Specifications :
- Voltage (relay): 5V
- Current (relay): approx. 70mA
- Maximum switching voltage: 250VAC
- Maximum switching current: 10A (at 125VAC), 7A (at 240VAC)
- Model: SRD-05VDC-SL-C
Watch this video it will give you a clear idea about this product.
Documentation