RELAY SHIELD V3.0, SEEED 103030009

The Relay Shield utilizes four high quality relays and provides NO/NC interfaces that control the load of high current. Which means it could be a nice solution for controlling devices that couldn’t be directly controlled by Arduino’s Digital I/Os. Standardized shield form factor enables smoothly connection with the Arduino. The shield also has four dynamic indicators show the on/off state of each relay.

Features:

- Arduino/Seeeduino compatible

- Standardized shape design

- Working status indicators for each relay

- High quality relays

- Provides NO/NC interfaces

Specification:

CHANNEL1 Interface:

COM1- Common pin

NC1- Normally Closed. Will be connected with COM1 when RELAY1 pin is set low and disconnected when RELAY1 is high; 

NO1- Normally Open. Will be connected with COM1 when RELAY 1 pin is set high and disconnected when RELAY1 is low;

4 Digital Pins to control 4 Relays: RELAY1-RELAY4 pins could be connected directly with Arduino pin number of 7-4, so that four relays could be easily controlled by the Arduino

Documents:

- wiki 

- forum