recommended relay for a LED power supply

Other Hardware Motors, Mechanics, Power and CNC
1

Dear all,

I'd like to control the LED on/off via a Grove relay.
The LED power supply is: 277 VAC 0.55A 50/60Hz (input) and +42VDC 2.9A (output).

The Grove relay options:
(1) Grove - Relay http://www.seeedstudio.com/depot/Grove-Relay-p-769.html
(2) Grove - SPDT Relay http://www.seeedstudio.com/depot/Grove-SPDT-Relay30A-p-1473.html
(3) Grove - 2-Coil Latching Relay http://www.seeedstudio.com/depot/Grove-2Coil-Latching-Relay-p-1446.html
(4) Grove - Solid State Relay http://www.seeedstudio.com/depot/Grove-Solid-State-Relay-p-1359.html

My questions:
(1) Are there any Grove Relay can meet the requirements? I see the Grove Relay only can handle +30VDC.
(2) Should I connect the Grove Relay to the input end (VAC) or the output end (VDC) of LED power supply?
(3) any other suggestions for this project?

Thanks all!
Michael

2

If you want dimming you have to coontrol the DC-side.
A N-channel logic level MOSFET can do this

3

Thanks. I just like to turn on/off LED lights. I like to know more information before doing it.

4

You will find ideas to mosfets in other posts

5

Any relay rated for 240ac would be fine.

The other option would be to switch the led on via the lower voltage dc side, which could be done with a mosfet.

6

Yes. I will try to get one MOSFET.
I also see a good post how to use a relay to the VAC-end.

http://www.glacialwanderer.com/hobbyrobotics/?p=9
http://www.gigamegablog.com/2011/01/08/netduino-let-there-be-light/

It seems it's safer to work on VDC-end.