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Temp Controller RNR, SNR what do they mean?

Started by Dave, I can't do that November 29, 2013
Hi All,

I am wanting to build a small 110vac temp controller for sous vide cooking. Found a bunch of PID controllers for around 20-bucks and lots of how-to-build instructions.

RNR, SNR and SSR?

I am guessing SSR is Solid Sate Relay, but what are SNR and RNR?

Search as I might I cannot find an explanation for those two. I see a zillion ads offering either type but have no idea which one I want.

Thanks

Dave

On 11/29/2013 9:48 AM, Dave, I can't do that wrote:
> Hi All, > > I am wanting to build a small 110vac temp controller for sous vide cooking. Found a bunch of PID controllers for around 20-bucks and lots of how-to-build instructions. > > RNR, SNR and SSR? > > I am guessing SSR is Solid Sate Relay, but what are SNR and RNR? > > Search as I might I cannot find an explanation for those two. I see a zillion ads offering either type but have no idea which one I want. > > Thanks > > Dave >
http://www.instructables.com/id/Arduino-Sous-Vide-Cooker/ http://learn.adafruit.com/sous-vide-powered-by-arduino-the-sous-viduino http://www.instructables.com/id/DIY-Sous-Vide-Machines/ https://www.google.com/search?q=arduino+sous+vide
On Friday, November 29, 2013 2:35:23 PM UTC-7, hamilton wrote:

Hamilton, I don't get it. 

>> but what are SNR and RNR?
How do those links answer my question. Building the Sous Vide is the simple part and I don't need instructions for that. Lead, follow or get out of the way. Dave
On 30/11/13 00:48, Dave, I can't do that wrote:
> Hi All, > > I am wanting to build a small 110vac temp controller for sous vide cooking. Found a bunch of PID controllers for around 20-bucks and lots of how-to-build instructions. > > RNR, SNR and SSR? > > I am guessing SSR is Solid Sate Relay, but what are SNR and RNR? > > Search as I might I cannot find an explanation for those two. I see a zillion ads offering either type but have no idea which one I want. > > Thanks > > Dave >
Since the PID controller will have a pulsed output for a SSR that is the one to use. The power will be going on and off a lot so you will not want to hear a relay clicking away whislt cooking, not to mention wearing out the relay contacts etc.
On 11/29/2013 3:45 PM, Dave, I can't do that wrote:
> On Friday, November 29, 2013 2:35:23 PM UTC-7, hamilton wrote: > > Hamilton, I don't get it.
Of all the links, did any one of them use anything other than a SSR ?
> >>> but what are SNR and RNR? > > How do those links answer my question. Building the Sous Vide is the simple part and I don't need instructions for that. > > Lead, follow or get out of the way.
Sorry to waste your time, I won't do it again.
> > Dave >
In article <6095fc3f-2386-429a-86c9-841c603c1249@googlegroups.com>,
Dave, I can't do that <davenpete@gmail.com> wrote:

>Hi All, > >I am wanting to build a small 110vac temp controller for sous vide >cooking. Found a bunch of PID controllers for around 20-bucks and lots >of how-to-build instructions. > >RNR, SNR and SSR? > >I am guessing SSR is Solid Sate Relay, but what are SNR and RNR?
As I read one discussion, an RNR model has a built-in relay which is capable of switching a specified class of loads. An SNR model has a low-voltage output which is intended to switch an external relay (commonly an SSR, as you note).
David Platt wrote:
> In article <6095fc3f-2386-429a-86c9-841c603c1249@googlegroups.com>, > Dave, I can't do that <davenpete@gmail.com> wrote: > >> Hi All, >> >> I am wanting to build a small 110vac temp controller for sous vide >> cooking. Found a bunch of PID controllers for around 20-bucks and >> lots of how-to-build instructions. >> >> RNR, SNR and SSR? >> >> I am guessing SSR is Solid Sate Relay, but what are SNR and RNR? > > As I read one discussion, an RNR model has a built-in relay which is > capable of switching a specified class of loads. An SNR model has a > low-voltage output which is intended to switch an external relay > (commonly an SSR, as you note).
-- Look at the numbering scheme for the TAx series PID controllers at http://www.mypinchina.com/uploadfiles/2010128112237650.pdf. It shows that this model controller has the capability of two main outputs, and an Aux output. The character "R" in any of these positions means that it has relay contacts at the output. The character "S" in any of these positions means that it has a solid state relay (SSR) at the output. The character "T" in any of these positions means that it has a silicon controlled rectifier (SCR) at the output. The character "N" in any of these positions means that there is no output for that position. For example, the number for model TA4-RNR indicates that the first output is a relay; the second output is None; and the third (Aux) output is a relay. Hope that helps Dave M
On Saturday, November 30, 2013 10:02:53 AM UTC-7, Dave M wrote:

> For example, the number for model TA4-RNR indicates that the first output is > > a relay; the second output is None; and the third (Aux) output is a relay.
Dave M, thanks very much. That explains it nicely for me. Very much appreciated the detail you went to. Dave
>
IS a pid's SSR low voltage output ac or dc?
On Fri, 24 Apr 2015 12:38:42 -0700 (PDT), dlmz06@gmail.com wrote:

> >> > >IS a pid's SSR low voltage output ac or dc?
DC --sp