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Dual SPDT Relay Board, Opto Isolated, for Arduino, ARM

Dual SPDT Relay Board, Opto Isolated, for Arduino, ARM

31357-large.jpg  360-3D.jpg    California Proposition 65 Warning
Stock No: 31357 MP
 Review Average:  
 Number of Reviews: 4
 View ReviewsReview this item

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 Detailed Description
Dual relay board designed to be driven by a Arduino, PIC, AVR or other micro controllers. Freeware available through www.arduino.cc.en & others on-line
LED indicatorsfor power & input.
Power: 5VDC @ 20mA/channel
Jumper Select either CPU Power or external.
Jumper Select either shared CPU & external Ground
or Total Isolated Ground.
Input: .1in. header with Vcc, Gnd, and input.
Input Signal: Ground energizes relay(s)
Contacts: SPDT 10A @ 28VDC,30VDC,125VAC,250VAC
Output: Terminal strips
L: 1-11/16" W: 1-5/8" H: 3/4" WT: .04

View PDF Data Sheet

California Proposition 65 Warning WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
(This item was manufactured prior to August 31st, 2018)

 Product ReviewsClick here to review this item
Similar to SainSmart Board
See http://www.sainsmart.com/arduino-pro-mini.html. Theres a schematic there. This board is a little different with jumpers to connect the VCC and GND either separately or in common.
- David Hartman, NJ
Isolation and Snubber
Without a schematic, this is just a guess: The Arduino device is isolated with optical couplers, and the flyback kick from the relay coil is suppressed with snubber diodes . Both the couplers and diodes appear to be on the board.
Steve Hollis
Needs documentation
I have not used my recently acquired board yet, but will soon. However, Im using it to switch a 120V low-current AC motor and would like to verify how the isolation is done and make sure I can trust the board. I need documentation to do that or I may have to use another product to be sure of UL conformance. Ill add stars when I can tell how it was designed.
Great Value
This relay board is a great value. The board is less expensive than the individual components. Almost all relays draw too much current to be powered directly from an Arduino pin. This is a good solution! Use a diode, across the load connected to the relay, to block electrical noise interference with your Arduino.
- Carl W, IL

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