encoding altimeter pinout?

[Bill Chernoff]

Hi Everyone,

I have an Aero Mechanism 8140B-20 Altimeter/Encoder. Does anyone happen to
have a pinout for this model? Or any ideas on where to find one? The google
search turned up an Aero Mechanism CNC, but they are not the right guys.

tia

Bill

[Icebound]

"Bill Chernoff" > wrote in message
news:vYZIc.9077$od7.923@pd7tw3no...
> Hi Everyone,
>
> I have an Aero Mechanism 8140B-20 Altimeter/Encoder. Does anyone happen
to
> have a pinout for this model? Or any ideas on where to find one? The
google
> search turned up an Aero Mechanism CNC, but they are not the right guys.
>
> tia
>
> Bill
>
>
>

Did you find this list?
http://www.horizonaero.com/PDF%20Downloads/042604_07147-Tech-Pubs-Index.pdf

The overhaul manual for that unit is in there. I don't know if that
necessarily means that they supply info from it...

[Pete]

Try the rocky mountain encoder site....

http://www.rkymtn.com/einstall.pdf

Cheers,
Pete
Europa with both short and long wings

"Bill Chernoff" > wrote in message
news:vYZIc.9077$od7.923@pd7tw3no...
> Hi Everyone,
>
> I have an Aero Mechanism 8140B-20 Altimeter/Encoder. Does anyone happen
to
> have a pinout for this model? Or any ideas on where to find one? The
google
> search turned up an Aero Mechanism CNC, but they are not the right guys.
>
> tia
>
> Bill
>
>
>

[Bill Hale]

"Bill Chernoff" > wrote in message news:<vYZIc.9077$od7.923@pd7tw3no>...
> Hi Everyone,
>
> I have an Aero Mechanism 8140B-20 Altimeter/Encoder. Does anyone happen to
> have a pinout for this model? Or any ideas on where to find one? The google
> search turned up an Aero Mechanism CNC, but they are not the right guys.
>
> tia
>
> Bill

Reverse Engineering Aeromechanism 8040 type Bendix connections

A+ R

Gnd H

A1 L
A2 K
A4 A

B1 J
B2 B
B4 F

C1 C
C2 E
C4 D

Gnd P

Jumper M-N

These come from a harness diagram for a
14 v airplane that did once work.

It might be that there is a D output... for you high
flyers. There is one pin, G, unaccounted for on the list
above. I'm not sure all Aeromechanisms would have this.

I believe that one of the grounds is a ground for the LEDs
and one is for the output phototransistors.

I think the jumper from M-N adjusts the current for 14v.
I'd guess that you would leave it out for 28v. You could
measure between them and see if it was a few hundred ohms...
that would confirm the theory.

That's the best I can do. Bill Hale