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Icom A210 Wiring Q..

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chris Sinfield

Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia

Posted: Sat Feb 05, 2011 2:37 am Post subject: Icom A210 Wiring Q..

Hi everyone.

I am wiring up my 2 seater  plane and have a few Q's after reading all the info.



I will just use the internal 2 place hot mic intercom system. The wiring diagram has an external intercom switch. Do I still need it and what is it for?



Also there are 2 options for the rear radio connection. A 30 pin molex or a 15 pin D sub. 



What have people been using to connect to? Pros and cons?



I want to use the 3 audio inputs and can not see how I can do this with the D sub and without  a separate intercom box.



Also it calls for a 10 Amp CB not a fuse? is this so if you get a hot TX mic you can pull the CB?? the Aero Electric connection guide only a 5 amp fuse for the Icom 200/A210?? Am I missing somthing?



Chris..

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mdnanwelch7(at)hotmail.co
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Posted: Sat Feb 05, 2011 6:08 am Post subject: Icom A210 Wiring Q..

 > I will just use the internal 2 place hot mic intercom system. The wiring diagram has an external intercom switch. Do I still need it and what is it for?

 	  Quote: 	
		   

 Also there are 2 options for the rear radio connection. A 30 pin molex or a 15 pin D sub. 

 

 What have people been using to connect to? Pros and cons?

 

 I want to use the 3 audio inputs and can not see how I can do this with the D sub and without a separate intercom box.

 

 Also it calls for a 10 Amp CB not a fuse? is this so if you get a hot TX mic you can pull the CB?? the Aero Electric connection guide only a 5 amp fuse for the Icom 200/A210?? Am I missing something?

 

 Chris..

  
	


 Hi Chris,

  

   A few months ago, I asked many of the same questions to this list.  I think it was Bob N.

 that suggested the DB15 plug.  I am very pleased with the plug for a connection.

  

   I also wondered about using the internal intercom in my Icom A200.  Some guys said

 they weren't especially thrilled with the internal intercom, and I would be better off with

 a separate panel mount one.  

   Although I didn't have a panel mount intercom, I did have a portable SoftComm intercom,

 and made a rectangular hole for it in my console.  For the most part, it looks like a built-in

 model, and what is really nice is, it has all the plug receptacles and so forth already available.

   I simply took it apart and added a few wires for the things I needed to convert it to panel

 mount style.  Wires like: positive and negative "hot", so that I didn't need the 9 volt battery, 

 Icom hookup wires, and I added the Dynon audio alarm signal to one of the "audio in" locations.

 (as per the SoftComm tech guy's approval).

  

   After I got the whole arrangement finished, I'm very pleased with the results!  The DB15 plug

 is the perfect choice, the separate intercom allows for more control of intercom functions ( I

 believe), and any additional audio requirements like alarms, music, etc. are very easy to add.

  

   Regarding the circuit breaker, the Icom installaion is not real clear.  One place says 10A, 

 then another refers to 5A. (or some kind of confusion like that).  I think I called Icom, but in

 any event, I went with the 5A breaker.  I think it was in the Icom's specs where it says it's

 maximum current was around 2 amps.  I have mine hooked up to a 5A breaker, but I seem to

 recall someone on this list said a 10A breaker would hurt.  I'd just go with 5.

  

   BTW, there are a few intercom companies that I found that have wiring diagrams for

 their particular intercom models to hook up to various aircraft comm radios.  Sigtronics

 is one that I know of.  I used their wiring diagram to coach me through the SoftComm wiring

 points.  Once I felt like I had everything figured out, I called and verified I was on the right path

 with SoftComm.  Worked perfect on the initial test!!!

  

 Mike Welch



 		 	   		    [quote][b]

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nuckolls.bob(at)aeroelect
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Posted: Sat Feb 05, 2011 7:52 am Post subject: Icom A210 Wiring Q..

At 05:37 AM 2/5/2011, you wrote:


<chris_sinfield(at)yahoo.com.au>



I will just use the internal 2 place hot mic intercom system. The 

wiring diagram has an external intercom switch. Do I still need it 

and what is it for?



   The manuals are not helpful as to the function of this

   switch. With a voice activated intercom, you don't need

   the press-to-talk button associated with hot-mike intercoms.

   However, I would suggest you bring some wires out

   for this switch and then explore what it does after

   you've got it up and running. It may be a handy way

   to turn the intercom function OFF . . . which could

   be handy if you're busy talking to controllers and you

   don't want inadvertent conversation from the right seat

   passenger to go out on the radio.



   For all of ICOM's expertise in electronics, their

   manuals leave some things to be desired. Perhaps

   somebody here on the List has explored the function

   of that switch and can advise you.

Also there are 2 options for the rear radio connection. A 30 pin 

molex or a 15 pin D sub.



   As Mike pointed out, the D-Sub is much preferred . . . .

   but it does not exactly parallel the Molex connnector

   for wire functions. If you need ANY of the wires in

   the Molex connector for your installation, then

   you're pretty much stuck with that connector. It's

   not a "bad" connector but the D-sub is much "better".



I want to use the 3 audio inputs and can not see how I can do this 

with the D sub and without  a separate intercom box.



   Aha! you've discovered the missing wires in the D-sub.

   If you want to use the internal audio isolation amplifier

   you'll need to use the Molex.



Also it calls for a 10 Amp CB not a fuse? is this so if you get a hot 

TX mic you can pull the CB?? the Aero Electric connection guide only 

a 5 amp fuse for the Icom 200/A210?? Am I missing somthing?



   No, that 5A fuse call out in my drawings is an artifact

   from having produced a wiring diagram for the MicroAir

   760. The manuals for the ICOM call out 5A max draw in

   transmit, so you need to up size to 7A fuse, or 10A or

   what ever. Remember, fuses and breakers protect wires.

   A long as they're matched to the wire large enough to

   avoid nuisance trips, then you're good to go.



   I need go fix that drawing . . . which is about 10

   years old. I'm going to up size to 7A fuse. I AM a bit

   disappointed that you're the FIRST to have brought it

   to my attention. Thanks!

   Bob . . .

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nuckolls.bob(at)aeroelect
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Posted: Sat Feb 05, 2011 11:14 am Post subject: Icom A210 Wiring Q..

At 11:14 AM 2/5/2011, you wrote:

 	  Quote: 	
		  Hello Chris



I have recently installed a A210 in my Kitfox. I just wired in a 

push button switch (like a PTT) to the intercom switch wires. One 

push and it either connects or disconnects the intercom. Works great 

for a noisy cockpit like mine.


	


   So if I interpret your words correctly, this button

   is a push-enable/push-disable control for the intercom.

   An when the intercom is enabled, it functions as the

   legacy voice-activated intercom with adjustable squelch

   levels. Does this sound right?



   Thanks! Good data point.

   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Feb 05, 2011 7:52 pm Post subject: Icom A210 Wiring Q..

At 05:13 PM 2/5/2011, you wrote:

 	  Quote: 	
		  Hello Bob



That`s right. First I had a ordinary off/on toggle switch, but I 

found that it had to toggled both ways each time in order to 

activate or deactivate the intercom. Now I just push the switch 

once. I mounted the switch up next to the radio so either side can 

activate. For my noisy cockpit I have the intercom shut off always 

unless conversing with a passenger.. It is also possible to 

connect/disconnect on the radio but this requires finding the 

function on the menu. Switch,much more convenient.


	


   Great data point. I which the manual was more

   clear on this.

   Bob . . .

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