View Full Version : Single pole Single throw toggle switches in IIT

07-14-2017, 01:37 AM
Jon Luc, perhaps you could help on this one. I just replaced my 2 engine Master switches with 2 single pole single throw switches. Is there any way that IIT can be able to program the OFF side of these switches when they are open Circuit ?

Regards................Brian W.

07-16-2017, 09:23 AM
There should already be an option to invert the logic??


07-16-2017, 07:26 PM
Thank you JL for the reply.

I think there appears to be an anomoly in the naming of switches. The switch I am using is a toggle switch which is an on and off switch, lever type.

This is how I programmed it in ITT, as a Toggle action. It would not work. So I then tried it under Separate Press/ Release action , then it worked.

I have always assumed that Separate Press/ Release action was for a Momentary Switch.

So I am sorry that there is a confusion in the naming of switches, which can make things a little complex at times.

Thanks for all your great work.....................Brian W.

07-20-2017, 12:32 AM
JL, as a matter of making sure that I do not have a problem with the IIT programming, can you please confirm your switch definitions in case they are different to mine.
In other words, your definition of a Toggle switch and momentary switch.

Regards..........Brian W.

07-20-2017, 10:08 AM

Toggle for me is the logical sense: every time you push a switch the logical state changes to it's opposite state.

Momentary switch is a mechanical thing: switch springs back to it's neutral position (usually opened circuit).

Separate press/release actions allows you to assign specific actions on your switch press/release events. If your SPST switch is electrically inverted to my soft logical (where ON means closed circuit and OFF open circuit), you could assign your switch open circuit to logical ON.

Toggle is meant to work with only one electrical event, usually the non steady position, so every time you push a momentary switch the logic behind toggles on and off accordingly.

Jean Luc

07-20-2017, 07:41 PM
Toggle Switch:
Ok it is fairly simple, as it is either ON or OFF.
They come with varying connections, mostly in our configurations they are Single pole single throw, single pole double throw and also occasionally if one can be found, triple throw.
But all work on the same principle that they are ON or OFF.
The Single Pole Double Throw is ON and ON instead of a Single pole Single Throw which is ON and OFF

Push Button Switches:
These can be either Momentary or Toggle. If they are Toggle they lock when pushed down and are ON and pushed again they Release and are OFF.

Momentary Switch:
http://www.mycockpit.org/forums/attachment.php?attachmentid=12437&stc=1 These switches are always OFF. When you press them they make contact and they are ON, when you take your finger off they are OFF. Programming takes care of what happens when you either press and release once or twice or 3 times.

Rotary Switch:
These are just multiple (Toggle) ON switches. One lead IN to be placed on Multiple leads Out, one at a time.

MICRO Switches:
These can be wired as either ON or OFF and when they are pushed down they are the opposite. ( Still a Toggle switch) Used on places such as Undercarriage gear Lever, or parking brake etc.

Hope this explains the idea of switches, which should clarify both to builders and programmers as to what they do.
Here is a link that may be useful:


Regards...............Brian W