-klb- Posted May 8, 2008 Share Posted May 8, 2008 If you are thinking about controlling relays with LOR, but have read about some of the issues about not enough load on the channel to keep the triac from shutting off early and causing the coil to buzz, or the relay to chatter, here is an idea...Use a DC card, and 12VDC relays. The MOSFETs on the DC card don't have the minimum hold on issue that the triacs do, so there should be no issues there. The only issue is that you should put a reverse biased diode in parallel with the relay or solenoid coil, to prevent the inductive voltage spike that can occur when the current in the coil is turned off.Of course, if the I/0-32 card arrives this year, it will provide some other options, but especially for Halloween, I am currently planning based on product I know I will be able to buy at the summer sale. - Kevin Link to comment Share on other sites More sharing options...
rwgaines4 Posted September 9, 2008 Share Posted September 9, 2008 I too am longing for the 32 channel I/O card. Are there any progress updates on this? Link to comment Share on other sites More sharing options...
Donald Puryear Posted September 9, 2008 Share Posted September 9, 2008 I used a dc card to control 16 solid state relays last year, worked great. And yes am waiting for the IO Card too!!!!!!!!!!!!!!! Link to comment Share on other sites More sharing options...
Recommended Posts