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Author Topic: I need help on how to choose proper relay?  (Read 182 times)
N3WTON
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Posts: 1


« on: June 19, 2011, 01:03:26 PM »

Hi all, I need to modulate ON/OFF an output of a high-voltage function generator (sinewave 200 Vpp, 100 kHz) with a relay. I have never handled a relay before.

1. Hence could anyone help me how I could choose the proper relay to do the job?
2. In specific, what parameters in a relay I should look for?
3. And, is it possible for the relay to ber controlled via FPGA card?

Many thanks,

N3wton
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veeyesvee
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Posts: 125


« Reply #1 on: June 19, 2011, 01:14:53 PM »

The first thing you can try is with a 230V rated 1 amp relay. This is contact rating. Whether you will get into problems with capacitance of the contacts when they are open, will depend on the load that you plan to connect, which you have not indicated. However, if there is shunt resistor of say 50k across the load, your problems, if any,  will not be severe.
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