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 <ch...@wbmfg.com> 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?

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