Wiring AP Level Button

[myrv9.com]

Lucas-

I am a bit confused with the AP Level button wiring where it crossed the CWS circuit. I don't plan on using the CWS, so is the following correct?

AP Level PIN-1 goes to ground only.

AP Level PIN-2 goes to PIN-20 on the back of the EFIS?

[TrutrakTech]

Hi Peter,

You have it correct. Just remove the CWS switch from the diagram. Thanks!

[myrv9.com]

Lucas-

More questions on wiring...

#1 - I have a Garmin SL30, which needs to be connected. The EFIS AP Install guide shows only two pins being connected to the SL30. PIN-3 going to the SL30 RS232 Output (pin4 on SL30). Also PIN-30 going to the SL30 RS232 Input (pin5 on SL30). This leads me to two issues. Is that it? The SL30 has a 37-PIN connector with call outs for loads of stuff. Can I ignore all of that other stuff, and just use the two pins above (plus pwr & grn on SL30)? Also, SL30 has a RS232 Ground on pin3 of the SL30. Do you know what I should do with that?

#2 PIN-4 is called out as a dimmer connection. I have an external dimmer switch on the panel, but I was only thinking it would dimm the panel post lights which are all led. Can I ignore this, and dimm the EFIS manually?

#3 Running the TCB A/B wires to the EDM calls for twisted pair wiring. What about shielding on those wires? Should I run a shielded wire, and then tie both sets of twisted pair tor TCB from EFIS 1 & EFIS2 to ground at the EDM?

#4 Audio Output on PIN-13. I have two EFIS screen going in. Should I run pin 13 from each to two separate 'unswitched' inputs on my audio panel?

Thanks for your help.

[TrutrakTech]

Hi Peter, hopefully I can answer all your questions.

1) Correct. That's it. The SL30 has a lot of outputs for analog signal output, the EFIS doesn't use that. Connect the two RS232 in/out wires as specified and make sure you connect the RS232 ground pin from the SL30. Serial signals have to be grounded to function correctly.

2) The built-in dimmer on the EFIS will dim the display. The dimmer input is actually only for the button backlights. They aren't terribly bright at night, so I honestly wouldn't worry about it.

3) Shielding is ok, but usually the twisting takes care of any interference that might be present.

4) Only input the audio from your EFIS AP (if you have an EFIS AP model) as most of the prompts have to do with the AP portion.

Let me know if there are any other questions. Thanks!

[myrv9.com]

1) Correct. That's it. The SL30 has a lot of outputs for analog signal output, the EFIS doesn't use that. Connect the two RS232 in/out wires as specified and make sure you connect the RS232 ground pin from the SL30. Serial signals have to be grounded to function correctly.

Lucas, thanks for the quick answers.

One more clarification.

The SL30 RS232 ground. Should that tie into a normal power ground, or to the bundle that is being grounded on the casing of the SL30 Tray? I guess I am not sure how this 'signal' ground works.

[TrutrakTech]

Connect to your normal ground. Thanks!

[myrv9.com]

Lucas-

Soon I will be done with the wiring... and leave you alone for a bit.

For now, I have moved on to the GARMIN 696. I purchased the data cable for my 696. It has a blue (out) and yellow (in) connection. Your diagram shows the NMEA signal going to PIN-25. Since I do not have a 430, I assume I can ignore the ARINC A/B connections. Thus a single connection line from the blue wire is all I need to drive the Track indicator and the follow GPS Auto Pilot from a Garmin 696?

Since I am running two EFIS displays, should I splice the line and run a split NMEA to both EFIS screens? ( I don't see any wires that go between the two EFIS screens, other then both going to the EDM)

Looks like I will also have to make a system setting change in the 696. The manual mentions selecting 'System Setup/Interface/Serial Data Format/'TIS In-NMEA & VHF Out'. Will the EFIS control any of the radio frequencies of the SL30?

I will be using the yellow (in) wire to run a TIS line from my transponder.

[TrutrakTech]

Hi Peter,

You are correct, there is no need to worry about ARINC wires as the 696 does not have an ARINC output.

Also correct on the serial connection. Just split it off to both displays. The output just needs to have NMEA in it. Hope this helps!