The issue Mark is talking about is that relay contact ratings are lower for DC because AC arcs are self-extinguishing.
On the other hand, AC is RMS and the peak will be higher, so technically 24VAC is around 34V peak on a sinewave. But I suspect you’d be fine. From: AF <[email protected]> On Behalf Of Bill Prince Sent: Monday, September 21, 2020 2:28 PM To: [email protected] Subject: Re: [AFMUG] Site Monitor Relay Question He was talking about the output, so I assume we're talking about the voltage that's being switched, not the input. bp <part15sbs{at}gmail{dot}com> On 9/21/2020 12:25 PM, Mark Radabaugh wrote: Are we talking about AC on the contacts? Coil will only work with what it’s specified for (AC or DC). Contacts will be fine with AC if they have a DC rating. The inverse isn’t necessarily true. Mark On Sep 21, 2020, at 3:17 PM, Bill Prince <[email protected] <mailto:[email protected]> > wrote: But the reverse is generally not a problem. AC RMS current is much less demanding than continuous DC current. bp <part15sbs{at}gmail{dot}com> On 9/21/2020 9:40 AM, [email protected] <mailto:[email protected]> wrote: I have had AC coil relays get stuck closed with putting DC on them. From: TJ Trout Sent: Monday, September 21, 2020 10:30 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Site Monitor Relay Question it will work fine On Mon, Sep 21, 2020 at 8:34 AM <[email protected] <mailto:[email protected]> > wrote: Yes, some do. Some will get magnitized if they are AC relays and you use DC on them. -----Original Message----- From: Nate Burke Sent: Monday, September 21, 2020 9:29 AM To: Animal Farm Subject: [AFMUG] Site Monitor Relay Question The Specsheet for the 4 channel relay output unit says 1A@24VDC. I want to control some HVAC Dampers that are running at 24VAC. The Relay doesn't care if it's VAC or VDC right? -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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