Home Brew Forums

Home Brew Forums (http://www.homebrewtalk.com/forum.php)
-   Electric Brewing (http://www.homebrewtalk.com/f170/)
-   -   3 way switch, stacking N/O contact blocks? (http://www.homebrewtalk.com/f170/3-way-switch-stacking-n-o-contact-blocks-265568/)

IronBridgeBrewery 08-29-2011 03:27 PM

3 way switch, stacking N/O contact blocks?
 
I have noticed on some of P-J's diagrams that it seems his 3 way switches seem to have 2 sets of NO contact blocks. Can you buy another set of NO contact blocks and just stack them on to the first set of a 3 way switch?

Example below:

https://lh6.googleusercontent.com/-M...ch_2setsNO.png

Thanks,

~jake

Walker 08-29-2011 04:39 PM

Quote:

Originally Posted by IronBridgeBrewery (Post 3211144)
I have noticed on some of P-J's diagrams that it seems his 3 way switches seem to have 2 sets of NO contact blocks. Can you buy another set of NO contact blocks and just stack them on to the first set of a 3 way switch?

Example below:

https://lh6.googleusercontent.com/-M...ch_2setsNO.png

Thanks,

~jake

I am not sure I understand your question. Those switches are double-pole, double-throw switches with a center-off position.

Where/how do you want to "stack" something?

ikonis 08-29-2011 05:09 PM

You can add as many contact blocks as you want. I have done this on my electric rig to switch between the HLT and BK. It also switches which RTD sensor the PID is reading. One PID for both vessels.

IronBridgeBrewery 08-29-2011 05:53 PM

Quote:

Originally Posted by Walker (Post 3211411)
I am not sure I understand your question. Those switches are double-pole, double-throw switches with a center-off position.

Where/how do you want to "stack" something?

Here is the part number P-J used http://www.automationdirect.com/adc/Search/Search?searchquery=gcx3264-120&cmd=Search&fctype=adc.falcon.search.SearchForm Ctrl&TxnNumber=-1

I didn't see anything about those switches being double pole 3 way switches. That may be what I was missing in this. It switching 2 poles at the same time. I just assumed it was using 2 sets contact blocks to accomplish switching to connections per each way.

P-J was switching 2 connections (current to coil voltage and sending +5v to ssr or setting output to ssr) at the same time. In his diagram its switches 5&6.

http://www.pjmuth.org/beerstuff/imag...iring-2-4a.jpg

Thanks,

~jake

Walker 08-29-2011 05:55 PM

ahhhh.... cool. I didn't see the link to the switches. Those are nifty.

P-J 08-29-2011 06:43 PM

Yes you can add another N/O module to that switch.

Please keep in mind that the switch as shown from your link comes with a N/O & a N/C module. The switch is a "Center Off" 3 position switch. The behavior of a N/C module with a "Center Off" switch is somwhat difficult to handle with any wiring plan. You can remove the N/C module and add 2 (or 3)additional N/O modules to achieve what you want to do. No problem.

Here is a layout of the different types of "Center Off" switches with the connections shown in the selected positions. With the NC module, the center position has both of the N/C contacts closed.

http://www.pjmuth.org/beerstuff/imag...-off-no-nc.jpg

Hope this helps.

P-J

IronBridgeBrewery 08-29-2011 07:11 PM

P-J that's what i was thinking. Thanks for your input, I realize that they come w/ n/c blocks as well as N/O that's why i was asking about just buying another set of NC contacts to accomplish what you were trying to in your diagram.

Thanks for the great explanation and diagrams P-J! Thanks to Walker for chiming in as always.

~jake

P-J 08-29-2011 07:16 PM

Quote:

Originally Posted by IronBridgeBrewery (Post 3211897)
P-J that's what i was thinking. Thanks for your input, I realize that they come w/ n/c blocks as well as N/O that's why i was asking about just buying another set of NC contacts to accomplish what you were trying to in your diagram.

Thanks for the great explanation and diagrams P-J! Thanks to Walker for chiming in as always.

~jake

I relly hope the 'bolded' quote above is a typo. N/O - no?

With your setup, just remove the N/C block and add the N/O block(s).

IronBridgeBrewery 08-29-2011 07:48 PM

Sorry yes i meant NO, trying to type fast while at work dosnt always get out what i want. Thanks again,

~jake

P-J 08-29-2011 08:10 PM

Jake,

You are more than welcome. If there is any way that I can help you with your setup, please let me know.

I might be old but I'm willing.

P-J


All times are GMT. The time now is 02:05 AM.

Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.