Arduino Uno, Mega, Leonardo etc. compatible
4 mechanical relays with photo-coupled circuit
Equipped with screw holes for easy installation
Small form factor
Native Arduino compatibility
Groups of channels for High voltage connection
- COM1 - Common pin
- NC1 - Normally Closed, in which case NC1 is connected with COM1 when D0 is set low and disconnected when D0 is high;
- NO1 - Normally Open, in which case NO1 is disconnected with COM1 when D0 is set low and connected when D0 is high.
Terminal 2-4 are similar to terminal 1, except that the control ports are D1-D3.
9V DC power supply connection
The function of the Terminal and the Jack is the same since they are internally connected, and you can choose either of them in needs.
IO controlling 4 on-board relays
D0-D3 4pins could be connected directly with Arduino pin number of 7-4, so that four relays could be easily controlled by the Arduino.
315/433MHz RF control interface
Together with pin of GND and 5V, they are the interface for 315/433MHz RF with encoder module to control the 4 relays remotely.
XBee form Socket for directly control by Xbee
The 4 relays can be directly controlled by the Xbee through the 4 DIO ports of Xbee.
This shield is almost same as SeeedStudio shield, more details can be found at:http://seeedstudio.com/wiki/Relay_Shield_V1.0