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Fergus Kyle
Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada
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 Posted: Tue Apr 19, 2011 12:22 pm Post subject: 914 TACH/EMSD-10 |
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Cheers,
Today’s challenge is finding the wires which produce the RPM, hopefully. With 52 years into Amateur Radio licence, I’m having trouble sensing the meaning if the “electric’ tach on the 914 to hook up with my Dynon EMSD10 screen. The circuit diagram seems meagre to me.
The diagram on 914 Installation manual, p75 shows wires 26 and 13 magically feeding a tachometer of sorts - #26 is attached to its negative terminal and #13 attached to some other one undetermined. A third terminal on the tach gets 12Vdc. I have arranged 26&13 to connect but can’t comprehend the EMS connections to them. I suspect one goes to ground and one to the #32 EMS wire.
Am I correct? Your thoughts gratefully received.
Ferg [quote][b]
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lgds(at)post6.tele.dk
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| Posted: Tue Apr 19, 2011 8:52 pm Post subject: 914 TACH/EMSD-10 |
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Hi
I have aquestion from the same drawer: on the backside of the electric REV-counter there are tree pins marked #1, #2 and #3 - the 914 delivers output to the rev-counter in wire 26 and 13, but I can't find any documentation saying wich wire on wich pin ....
Gert
OY-GDS - Mono and 914
Den 19/04/2011 kl. 22.17 skrev Fergus Kyle:
| Quote: |
Cheers,
Today’s challenge is finding the wires which produce the RPM, hopefully. With 52 years into Amateur Radio licence, I’m having trouble sensing the meaning if the “electric’ tach on the 914 to hook up with my Dynon EMSD10 screen. The circuit diagram seems meagre to me.
The diagram on 914 Installation manual, p75 shows wires 26 and 13 magically feeding a tachometer of sorts - #26 is attached to its negative terminal and #13 attached to some other one undetermined. A third terminal on the tach gets 12Vdc. I have arranged 26&13 to connect but can’t comprehend the EMS connections to them. I suspect one goes to ground and one to the #32 EMS wire.
Am I correct? Your thoughts gratefully received.
Ferg | Quote: |
href="http://www.matronics.com/Navigator?Europa-List">http://www.matronics.com/Navigator?Europa-List
href="http://forums.matronics.com/">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
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[quote][b]
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h&jeuropa
Joined: 07 Nov 2006
Posts: 645
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| Posted: Wed Apr 20, 2011 7:14 am Post subject: Re: 914 TACH/EMSD-10 |
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Ferg & Gert,
For a 914 on the TCU plug, pin 26 & 13 are used for the tach. I wired ours to our GRT EIS with 26 as ground (since diagram (fig 52 914 install manual) shows 26 going to the negative terminal of the tach) and 13 as signal.
On the Rotax tach, there is a + sign next to terminal 1 and a - sign next to terminal 2, so I connected terminal 1 to +12, terminal 2 to ground & 26 of the TCU and terminal 3 to 13 of the TCU.
For a 912 the diagram (figure 67 page 109 of 912 install manual) shows 23 to be the plug from the tach coil (shown as #24) and either wire can go to terminal 3 of the tach, the other wire goes to terminal 2 of the tach which also is connected to ground. Terminal 1 of the tach connects to +12.
Hope this helps.
Jim & Heather
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lgds(at)post6.tele.dk
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| Posted: Wed Apr 20, 2011 7:54 am Post subject: 914 TACH/EMSD-10 |
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Hi Jim
That info just did the job 
Thanks.
Gert
Den 20/04/2011 kl. 17.14 skrev h&jeuropa:
| Quote: |
Ferg & Gert,
For a 914 on the TCU plug, pin 26 & 13 are used for the tach. I wired ours to our GRT EIS with 26 as ground (since diagram (fig 52 914 install manual) shows 26 going to the negative terminal of the tach) and 13 as signal.
On the Rotax tach, there is a + sign next to terminal 1 and a - sign next to terminal 2, so I connected terminal 1 to +12, terminal 2 to ground & 26 of the TCU and terminal 3 to 13 of the TCU.
For a 912 the diagram (figure 67 page 109 of 912 install manual) shows 23 to be the plug from the tach coil (shown as #24) and either wire can go to terminal 3 of the tach, the other wire goes to terminal 2 of the tach which also is connected to ground. Terminal 1 of the tach connects to +12.
Hope this helps.
Jim & Heather
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=337602#337602
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