This is fine. You can even get some solid-state relays and use 2 Rancos (or similar devices) in series (one is the fail-safe that is set a few degrees above the other). The output of the Rancos (120VAC) can drive the SSRs. Use the type of SSR with the 120VAC input. You would only really need one for each rack.



You could also use a mechanical relay (or three) with 120VAC coil voltage. Mechanical relays are cheaper but you'll need to solder to them usually, or else get the relay carriers with the screw terminals. You'll have to cover them so you don't get shocked.



The new SSRs come with a nice plastic cover and are finger-safe against shock. You can get this stuff at www.digi-key.com or search for DigiKey or Digi-Key on a search engine.
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Mark G

[ Hide Replies ]

• Any thoughts on this heat control Idea? - Frazenhiemer, Wed Mar 23 17:23:10 2005
• RE: Any thoughts on this heat control Idea? - chris_harper2, Wed Mar 23 17:34:49 2005
• RE: Any thoughts on this heat control Idea? - bighurt, Wed Mar 23 18:20:17 2005
• Do you have a sketch or picture you could provide.... - BobS, Wed Mar 23 19:39:38 2005
• RE: Do you have a sketch or picture you could provide.... - bighurt, Wed Mar 23 20:36:19 2005
• thanks. N/P - bobS, Wed Mar 23 20:54:27 2005
• Is this possible?.... - bobs, Thu Mar 24 12:15:45 2005
• Here's another possible thought - Chris_Toon, Thu Mar 24 14:04:32 2005
• RE: Any thoughts on this heat control Idea? - Chris_Toon, Thu Mar 24 00:12:06 2005
• RE: Your theory on heat element wear is incorrect, here's why - markg, Thu Mar 24 18:59:37 2005
• RE: Your theory on heat element wear is incorrect, here's why - frazenhiemer, Thu Mar 24 20:03:44 2005
• RE: You are right about the cost. More - markg, Thu Mar 24 21:47:11 2005
• RE: You are right about the cost. More - Frazenhiemer, Sun Mar 27 19:26:48 2005
• RE: Can be done - markg, Mon Mar 28 19:46:24 2005