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1-Channel OptoIsolated 30A Relay Board
1-Channel 30A Relay Board with Opto-Isolation
Click on image above for larger view, then click upper right for image showing isolated connections
With high-current relay, AC250V 30A ; DC30V 30A
USE: Connect 5V to DC+ and Gnd to DC- , Connect Arduino output pin to "IN"
NOTE 1: This relay board will draw about 200mA at 5V. You can only run 1 or possibly two of these from the Arduino 5V supply.
NOTE 2: Connections: DC+ to Arduino +5V DC- to Arduino GND IN to Arduino digital output pin
NOTE 3: For complete isolation, remove both lower jumpers and connect external 5V supply to JD- and JD+ Best to use an external 5V supply like this:
NOTE 4: This relay board can have the IN connection work as active-LOW (Top jumper to the left) or Active-HIGH (Top jumper to the right).
Note 5: The YourDuino RoboRED has a 5V 2A supply and can run many more relays when it is powered from an external 9V to 20V supply.
Please Read This Electrical Safety / Disclaimer page before using the relay board in this product.