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switch wiring

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kevann(at)gotsky.com
Guest

Posted: Sun Mar 09, 2008 2:18 pm Post subject: switch wiring

Bob and all,



I have a couple questions.



I am wiring a Rotax 914 in my Europa per Z-16(sort of). I want to use a 

switch for each "mag" that will be down-off, middle-on, momentary-up of 

both to start. Is there a drawing somewhere on the site that shows how 

to wire this?



I also want to wire a switch to control two alternators, the rotax built 

indynamo and a Denso IR alternator mounted on the vac pad. I would like 

to use one switch; down-dynamo middle-off and up-main 

alternator(denso).Is there a drawing showing how to wire that?



Thanks, Kevin

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klehman(at)albedo.net
Guest

Posted: Wed Mar 12, 2008 4:31 pm Post subject: switch wiring

Kevin



You may need a starter contactor or relay but an ON-OFF-momentary ON 

switch can probably be wired to do the mags like that. I don't know if 

you will find such a ready made diagram though (or anyone to recommend 

it), as I think such a scheme  would greatly increase the risk of injury 

from a live mag. I can understand an OFF-Batt-Alt switch but generally I 

try to avoid those 3 position switches as I find them awkward, 

especially at night.



Also it may be more common to use a separate switch for each alternator. 

That way one failed switch can't disable both alternators.

Ken



Kevin Klinefelter wrote:

 	  Quote: 	
		   

 <kevann(at)gotsky.com>

 

 Bob and all,

 

 I have a couple questions.

 

 I am wiring a Rotax 914 in my Europa per Z-16(sort of). I want to use a 

 switch for each "mag" that will be down-off, middle-on, momentary-up of 

 both to start. Is there a drawing somewhere on the site that shows how 

 to wire this?

 

 I also want to wire a switch to control two alternators, the rotax built 

 indynamo and a Denso IR alternator mounted on the vac pad. I would like 

 to use one switch; down-dynamo middle-off and up-main 

 alternator(denso).Is there a drawing showing how to wire that?

 

 Thanks, Kevin

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Mar 12, 2008 5:57 pm Post subject: switch wiring

Kevin Klinefelter wrote:


Bob and all,



I have a couple questions.



I am wiring a Rotax 914 in my Europa per Z-16(sort of). I want to use a 

switch for each "mag" that will be down-off, middle-on, momentary-up of 

both to start. Is there a drawing somewhere on the site that shows how to 

wire this?



I also want to wire a switch to control two alternators, the rotax built 

indynamo and a Denso IR alternator mounted on the vac pad. I would like to 

use one switch; down-dynamo middle-off and up-main alternator(denso).Is 

there a drawing showing how to wire that?



Thanks, Kevin



     For the ignition switches you need two, two-pole,

     three position, center off, one side momentary

     devices.



     Another way to describe this switch is 2P3T on-off-(on).

     This would be a B&C S700-2-5 switch. See:



     http://www.bandc.biz



     Wire one side of each switch to their respective ignition

     modules such that the switch is closed in the down position

     and shorts the ignition module to an OFF condition.



     Wire the other sides of the two switches in series such

     that both have to be lifted to the START position to

     engage the starter contactor.



     Recommend you keep the two alternator switches separate.

     You don't want failure of one switch to cause both alternators

     to become unavailable to you.



     Bob . . .

        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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