Rotax 3 pin oil sender

[skippydiesel]

Did an hour yesterday, in the Sonex (without the seal on the fuel pressure sensor/plug) - no sign of the intermittent low fuel pressure indication/warning - looking good!

 

Will not make any further comment ,until several hours have gone by, without a low pressure warning.

[danny_galaga]

Funny the things you learn along the way! Thanks for keeping us up to date. Now I just need to find out what the pin-out is on this plug

[IBob]

Danny, as I recall, my engine came with the sensor/sender (we just used to call them transducers) fitted, with the plug and cable attached. The cable would have been marked, so no need to meter through to the plug pinout.
If all else fails, maybe you could find someone with a new uninstalled engine, and get them to meter out the cable/plug for you.

[danny_galaga]

16 minutes ago, IBob said:

Danny, as I recall, my engine came with the sensor/sender (we just used to call them transducers) fitted, with the plug and cable attached. The cable would have been marked, so no need to meter through to the plug pinout.
If all else fails, maybe you could find someone with a new uninstalled engine, and get them to meter out the cable/plug for you.

Might have a look at the Tecnam my engine came out of. See if I can figure it out from there...

[facthunter]

THAT sort of information shouldn't be hard to find. Plenty would want to get it right.  Nev

[IBob]

Agreed, Nev: if buying from a transducer manufacturer or supplier, it would all be on the data sheets. But Rotax have gone to their own numbered part (albeit manufactured by others) so unless we have a non-Rotax part number for the unit, we're guessing a bit. Unless Rotax have published details somewhere.....they may have.

[danny_galaga]

Actually just realised Skyreach should know, since they build factory planes as well as kits. Will email them now 🙂

[IBob]

Okay, so I found this, which suggests that they are using a 2 wire current loop setup:
https://duckduckgo.com/?t=ffab&q=pinout+of+rotax+oil+pressure+sender&atb=v356-1&iax=images&ia=images&iai=https%3A%2F%2Fdesk.zoho.com%2FDocsDisplay%3FzgId%3D714941653%26mode%3Dinline%26blockId%3D1hflqdbff7005142a40f9ac47410e66c421a2

 

It says that
Pin A = n/a
Pin B = 8-24VDC (12V in our case)

Pin C = Signal
 

And here is how it is wired to the gauge:
https://duckduckgo.com/?t=ffab&q=pinout+of+rotax+oil+pressure+sender&atb=v356-1&iax=images&ia=images&iai=http%3A%2F%2Fwww.aviasport.com%2Fimages%2FConexiones_OIL_P_4_20_57.gif

 

Danny, I found that by searching 'pinout of rotax oil pressure sender'.

 

[IBob]

And here is a the A/B/C pinout:
https://duckduckgo.com/?t=ffab&q=pinout+of+rotax+oil+pressure+sender&atb=v356-1&iax=images&ia=images&iai=http%3A%2F%2Frepairguide.autozone.com%2Fznetrgs%2Frepair_guide_content%2Fen_us%2Fimages%2F0996b43f%2F80%2F20%2F27%2F4c%2Fmedium%2F0996b43f8020274c.gif

[Blueadventures]

Just to add some real world experience.  Had a UMA air switch connected as per the wiring diagram.  After much disappointment of it not working and about to send back tried reversing the positive and negative and it worked.  A go figure moment.  Working still now 345 hours later.  Murphy is always up there springing surprises.

[danny_galaga]

3 hours ago, IBob said:

And here is a the A/B/C pinout:
https://duckduckgo.com/?t=ffab&q=pinout+of+rotax+oil+pressure+sender&atb=v356-1&iax=images&ia=images&iai=http%3A%2F%2Frepairguide.autozone.com%2Fznetrgs%2Frepair_guide_content%2Fen_us%2Fimages%2F0996b43f%2F80%2F20%2F27%2F4c%2Fmedium%2F0996b43f8020274c.gif

I must admit my Google-fu was weak with this one.

 

Gauge hookup is a no brainer, I've already wired it as per diagram on the housing.