In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Tom M wrote:

Thanks for all the quick responses!

Mr. Chan:  NO. the SX Power Ground is isolated from the Enclosure.
All the various Enclosures are grounded together and connected to AC Power Ground.

SamTheMan:  Would I Parallel all my 0.1uf Bypass Caps with the 0.01uf or Replace them?

Mr. Bernard:  Using Diodes across the Relay Coils cause a Long Dropout Delay, so I can't use them.
The relays are located in a separate enclosure about 3' away.
Additionally I'm using Optically Isolated Relay Drivers between my SX Board Outputs and the Relays.
The Relay Driver and Relays, have their own power source, isolated from everything else.

Mr. Richey:  That's making the most sense.  I'll try the batteries on Monday.
If that is the case, I'm tempted to Replace the Wall Wart with a Switching Regulated PS.
Think that would help with a the voltage drop.
I currently using a 4800uf filter cap.

I have another Question....   Searching the archives I found where someone posted a PDF file on Designing for 
this type of problems.  I mentions using "Suppressors" on the Relay Contacts to prevent Arching.

What are Suppressors?  Are they a single component or a circuit of some sort?

Tom M.

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=195154#m195423

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)