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Help with Simrad AP12 smart stick hook up.

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Help with Simrad AP12 smart stick hook up.

Old 07-03-2009, 08:21 PM
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Default Help with Simrad AP12 smart stick hook up.

I’m trying to hook up a AR1402 smartstick to my Simrad AP12 with a voltage regulator. I assumed it would be wired as follows:

Simrad (SLF12 Port
--- Voltage regulator (12v to5v) -----AR1402

Red --> ----------------> Red -----> ------------------> Red
Black --> --------------------------> Black--> -->-------------- --> Black
White <-- <--------------------------------------<--- <--White


The smartstick is apparently sending back the right voltage (1-4.5) on the white wire when disconnected.
However, when connected (and disconected) I am getting a 12 voltage reading between the red and white on the AP12 port.
Old 07-03-2009, 10:04 PM
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I ended up calling Teleflex -- the wiring instructions were terrible.

I have an AP11 and found out I had the wrong unit.

Any way--thier Tech support has been great otherwise
Old 07-04-2009, 07:06 AM
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Do you have the 4502? you said 1402? Assuming you have the 4502 , that is the smart stick that I have hooked up to my AP12. The 4502 is the generic smart stick and you were correct in buying that one instead of the Simrad compatable smart stick. THe ap12 is actually an old Navico design and Simrad bought Navico some years back so the ap12 is different from most all Simrads. THe generic smartstick requires 5VDC and the AP12 supplies 12VDC to the rudder feedback unit. So what you have to do is make or buy some type of converter to convert 12VDC to 5VDC.
I didn't try to send 12v to it and I just assumed since the teleflex literature said supply voltage should be 5V , that's what I would use. The Teleflex "smart stick" their part number AR 4502 has an output of 0.5VDC - 4.5VDC. and that is close enough to the 1V -4V signal that Simrad says the AP12 needs. Sometimes when setting up the smart stick you need to not turn the helm hard over in P and S directions and stop and set the limits a little less than full over. No big deal. Anyway, about the 5VDC, I looked on the net ,googled, and found a design that used a cheap little chip. A 7805CT , google that part and see the data sheet which gives you diagrams of typical applications. All was needed was adding a couple of capacitors, a .15uf and a .33uf. I also bought a little plastic enclosue box which I mounted this stuff in. I installed the litttle box with it's guts near the AP12 brain and ran the feedback supply wire (red, I think it was) from the AP12 brain that used to feed the feed back unit to the little voltage regulator and connected it's output to the Smart Stick. I actually added a small terminal strip that handles the connections at the little regulator box. Now my AP12 brain gets the signal it needs and works at least if not better than the orginal piece of junk the Navico supplied with the unit orginally.
I am no eclectonics guru, so this all was easy and only cost maybe 10-15 bucks, I even got 4-5 7805CT's as I think that's the way they come packaged.
However, if I understand your post, you are getting the correct signal voltage even though you are using 12VDC rather than the 5VDC that teleflex calls for? If that is the case then you have got it? no need for this bs that I did. Please post your results as I for one would be interested to see if it works of 12VDC.

PS , sorry, just re-read your post and you already have a regulator. So what is the problem? I could not under stand exactly what it was. It might help you, it did me, to relalize that the way Simrad calls for troubleshhoting or testing the feedback unit is not the way your ap12 brain sees it. Just hook it up to the brain and see what happens.

Last edited by knotreel; 07-04-2009 at 07:17 AM.
Old 07-04-2009, 09:21 AM
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I guess I'm confused on the hook up. I took the red and black from the brain SLF12 port, hooked it up to the 12-5 converter, from there to the smartstick (it is the 4502) and the white back to the brain. The unit would not allow me to set the rudder limits with this config. The smartstick is returning the correct voltage (1-4.5) on the white.

What seems odd is when I disconnect the wires from the brain SLF12 port and check the voltages the red to white voltage is 12. This would seem to conflict with the 1-4.5 input on that lead from the smartstick

Or is there something about setting the rudder limits that is different since the smartstick doesn't have a removable slide rod.

input appreciated.
Thanks
Old 07-04-2009, 03:46 PM
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Just from memory, I ran a ground to the 12-5 converter not the black from the brain. (well it probaly was a black but not that black.) So the red from the brain to the converter with a seperate ground for the converter. The 5v from the converter to the red wire of the 4502's cable. Then the black and white from the 4502's cable goes to the brain's white and black connection where the orginal rudder feedback was connected.
You may not be able to set the "rudder" limits at the end of travel hard over. So back off the hard over in both directions then try to set the limits.
Just to be sure your 12-5 converter is working check it's output for 5 v.
If your 4502 feedback is recieving 5VDC power there is no way it could be returning more than than.
If you can't get it to work, post again and tomorrow I will go out an look at mine some more but I think what I have told you is right.
Old 07-05-2009, 08:00 AM
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Yes !! I think the black wire ground was what was throwing me. Rudder limits took no problem.
A million thanks for your help!!!

I'm sure this will a much better fix than the OEM replacement.
If anyone is interested I picked my converter box up at powerstream.com. for $30.00.

Thanks again!!
Old 07-05-2009, 10:21 AM
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Originally Posted by erny View Post
Yes !! I think the black wire ground was what was throwing me. Rudder limits took no problem.
A million thanks for your help!!!

I'm sure this will a much better fix than the OEM replacement.
If anyone is interested I picked my converter box up at powerstream.com. for $30.00.

Thanks again!!
Yes these smart sticks are good, you have to ask yourself why did have to teleflex make produce this? is it because they don't make autopilots?
If I were making an autopilot I would want it to be like steve jobs is supposed to have said about the first apple. something like he wanted it to be "insanly good"? I just don't see how a company or more better, ALL
the companies that make autopilots, why didn't one of them produce a unit like the smart stick? As far as I know the rudder feed back on outboards is very troublesome on all of them?
Oh well, my hat is off to teleflex, which by the way as a pretty cool company, they make ALL SORTs of stuff you never knew about.

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