Switch to turn off power to digital turntable

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klafleur3		#1 Posted : 17 September 2014 03:52:10(UTC) Retweet
Joined: 11/09/2012(UTC) Posts: 77 Location: Ann Arbor		Does anyone know what toggle switch I could use to turn off digital power to a Marklin 7686 turntable? Also, do I need to connect this switch to a Marklin k84 relay? If so why? I assume the toggle switch would have to be edited to work with the k84 relay, correct? Any help would be appreciated. Thanks Ken


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Ross		#2 Posted : 17 September 2014 04:20:16(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 872 Location: Sydney, NSW		Hello Ken, Use a toggle switch or k84. See my tips page re programming the 7686 where I provide some wiring diagrams. Where I show a k84 contact you would use the toggle switch. Originally Posted by: klafleur3 Does anyone know what toggle switch I could use to turn off digital power to a Marklin 7686 turntable? Also, do I need to connect this switch to a Marklin k84 relay? If so why? I assume the toggle switch would have to be edited to work with the k84 relay, correct? Any help would be appreciated. Thanks Ken
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PMPeter		#3 Posted : 17 September 2014 04:23:54(UTC) Retweet
Joined: 04/04/2013(UTC) Posts: 1,274 Location: Port Moody, BC		Ken, Since it is a 7686 you should have a digital decoder with it. So I'm not sure what power you want to turn off. The turntable should only move when you tell the decoder to move it through either a 6040 keyboard or your controller. Perhaps you can explain what you are trying to achieve. Peter Now that I tracked down Ross' tips in another thread it is clear that he has spent a lot of time with these turntables. However, it is still not clear to me why you need to turn off the power to the decoder with either the toggle switch or K84. Is the decoder consuming controller power that you are trying to conserve or am I missing something?


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klafleur3		#4 Posted : 17 September 2014 04:54:02(UTC) Retweet
Joined: 11/09/2012(UTC) Posts: 77 Location: Ann Arbor		The documentation I found on the internt recommended I turn Off and On the turntable without turning off the entire layout. Right now, the digital turntable is connected to the entire layout. I assume by having a toggle switch, I could turn Off/On the turntable when I really need it. Also, I wouldn't have to turn off/on the entire layout if I need to reprogram or index the turntable tracks thru my Marklin 6040 keyboard. That is the only way I can iget the keyboard in input mode and I only have 5 seconds to do it afte I turn off/on the power to the entire layout. Finally, I assume this would provide me some protection if a train derails from messing up the index tracks somehow on the turntable. So, I assume the recommendation of connecting power to the turntable via a toggle switch and k84 relay was a good idea. But I'm not an electrician or expert in relays or toggle switches. It took me over a week searching the internet to learn how to connect and index the tracks on the turntable. I'm just delighted it finally works now. Ken


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Ross		#5 Posted : 17 September 2014 05:52:55(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 872 Location: Sydney, NSW		Hello Peter, The reason to isolate the turntable decoder is if the turntable loses it position you can turn off the decoder, then turn it back on (without having to turn off the entire layout. You have only 5 seconds to implement the turntable recovery to get the turntable to its correct position. Originally Posted by: PMPeter Ken, Since it is a 7686 you should have a digital decoder with it. So I'm not sure what power you want to turn off. The turntable should only move when you tell the decoder to move it through either a 6040 keyboard or your controller. Perhaps you can explain what you are trying to achieve. Peter Now that I tracked down Ross' tips in another thread it is clear that he has spent a lot of time with these turntables. However, it is still not clear to me why you need to turn off the power to the decoder with either the toggle switch or K84. Is the decoder consuming controller power that you are trying to conserve or am I missing something?
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