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GNS430 Communication Voltage- 14v or 28v?

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email(at)jaredyates.com
Guest

Posted: Fri Apr 15, 2011 9:38 pm Post subject: GNS430 Communication Voltage- 14v or 28v?

I'm wiring my 14-volt panel, which includes a Garmin GNS430, non-WAAS "legacy" version, and I am looking for advice from someone who is familiar with the development timeline.  I have an older hard copy of an installation manual that says that the aircraft power on the P4002 (Communications) connector must be at 28 volts.  I noticed in the more recent 430W installation manual that only the "A" high power units have this 28-volt requirement.  Does anyone know when the change happened?  For instance, do all of the old non-waas units have this 28-volt communication requirement, or is there a mod that makes some of the non-w units (hopefully mine) 14-volt capable?  The placard on the unit says that it is up to mod level 5, and I have a list of all of the various service bulletins that have been applied to it, in case any of that might help. 



  [quote][b]

bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sat Apr 16, 2011 3:36 am Post subject: GNS430 Communication Voltage- 14v or 28v?

4/16/2011



Hello Jared, You wrote:



1) "Does anyone know when the change happened?"



See this announcement from Garmin:



http://www8.garmin.com/pressroom/aviation/072600.html



2) "For instance, do all of the old non-waas units have this 28-volt 

communication requirement,...?"



No. Only the original 430 units required 28 volts. As described in the 

announcement after Garmin created the 14/28 version of the GNS 430 one could 

use either 14 or 28 volts.



3) "... is there a mod that makes some of the non-w units (hopefully mine)

14-volt capable?"



If you have an original GNS 430 28 volt only version an external 14 to 28 

volt converter will be required to make that 28 volt version work in a 14 

volt airplane.



Note this statement: "Garmin ended factory support for the 28 volt-only 

GNS-430 on September 30,2010. The 14/28 volt version remains fully 

supported." On this web page:



http://www.bennettavionics.com/gns430-28v.html



I suggest that you contact the Gamin tech people, give them your unit serial 

number, and find out whether you have a 28 volt only unit or a 14/28 volt 

unit. Good luck.



'OC' Baker Says: "The best investment we can make is the time and effort to 

gather and understand knowledge."



============================================================

Time: 10:38:13 PM PST US

Subject: GNS430 Communication Voltage- 14v or 28v?

From: Jared Yates <email(at)jaredyates.com>



I'm wiring my 14-volt panel, which includes a Garmin GNS430, non-WAAS

"legacy" version, and I am looking for advice from someone who is familiar

with the development timeline.  I have an older hard copy of an installation

manual that says that the aircraft power on the P4002 (Communications)

connector must be at 28 volts.  I noticed in the more recent 430W

installation manual that only the "A" high power units have this 28-volt

requirement.  Does anyone know when the change happened?  For instance, do

all of the old non-waas units have this 28-volt communication requirement,

or is there a mod that makes some of the non-w units (hopefully mine)

14-volt capable?  The placard on the unit says that it is up to mod level 5,

and I have a list of all of the various service bulletins that have been

applied to it, in case any of that might help.

email(at)jaredyates.com
Guest

Posted: Sat Apr 16, 2011 7:07 am Post subject: GNS430 Communication Voltage- 14v or 28v?

Thanks for the information, I'll call them on Monday.  The placard on the unit says 14/28v, but I didn't know if that meant 14 volts for everything except comm and 28 volts for com, or if that meant 14-28 volt input range for all of the inputs.  I'm glad to hear that the change was so long ago, though that doesn't say much for the status of my installation manual.

 

On Sat, Apr 16, 2011 at 7:32 AM,  <bakerocb(at)cox.net (bakerocb(at)cox.net)> wrote:

[quote] --> AeroElectric-List message posted by: <bakerocb(at)cox.net (bakerocb(at)cox.net)>

 

 4/16/2011

 

 Hello Jared, You wrote:

 

 1) "Does anyone know when the change happened?"

 

 See this announcement from Garmin:

 

 http://www8.garmin.com/pressroom/aviation/072600.html

 

 2) "For instance, do all of the old non-waas units have this 28-volt communication requirement,...?"

 

 No. Only the original 430 units required 28 volts. As described in the announcement after Garmin created the 14/28 version of the GNS 430 one could use either 14 or 28 volts.

 

 3) "... is there a mod that makes some of the non-w units (hopefully mine)

 14-volt capable?"

 

 If you have an original GNS 430 28 volt only version an external 14 to 28 volt converter will be required to make that 28 volt version work in a 14 volt airplane.

 

 Note this statement: "Garmin ended factory support for the 28 volt-only GNS-430 on September 30,2010. The 14/28 volt version remains fully supported." On this web page:

 

 http://www.bennettavionics.com/gns430-28v.html

 

 I suggest that you contact the Gamin tech people, give them your unit serial number, and find out whether you have a 28 volt only unit or a 14/28 volt unit. Good luck.

 

 'OC' Baker Says: "The best investment we can make is the time and effort to gather and understand knowledge."

 

 ==========

 

 

 Time: 10:38:13 PM PST US

 Subject: GNS430 Communication Voltage- 14v or 28v?

 From: Jared Yates <email(at)jaredyates.com (email(at)jaredyates.com)>

 

 I'm wiring my 14-volt panel, which includes a Garmin GNS430, non-WAAS

 "legacy" version, and I am looking for advice from someone who is familiar

 with the development timeline.  I have an older hard copy of an installation

 manual that says that the aircraft power on the P4002 (Communications)

 connector must be at 28 volts.  I noticed in the more recent 430W

 installation manual that only the "A" high power units have this 28-volt

 requirement.  Does anyone know when the change happened?  For instance, do

 all of the old non-waas units have this 28-volt communication requirement,

 or is there a mod that makes some of the non-w units (hopefully mine)

 14-volt capable?  The placard on the unit says that it is up to mod level 5,

 and I have a list of all of the various service bulletins that have been

 applied to it, in case any of that might help.

 

 

 

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 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

email(at)jaredyates.com
Guest

Posted: Sat Apr 16, 2011 7:12 am Post subject: GNS430 Communication Voltage- 14v or 28v?

For anyone else who might have this same question, I've just found the answer in a newer installation manual the Bob L. sent me.  Garmin changed the part numbers, so part number 011-00280-10 accepts 11-33 volts on all inputs, while part number 011-00280-00 requires the converter.  Fortunately mine is the -10 series.

 

On Sat, Apr 16, 2011 at 1:34 AM, Jared Yates <email(at)jaredyates.com (email(at)jaredyates.com)> wrote:

[quote] I'm wiring my 14-volt panel, which includes a Garmin GNS430, non-WAAS "legacy" version, and I am looking for advice from someone who is familiar with the development timeline.  I have an older hard copy of an installation manual that says that the aircraft power on the P4002 (Communications) connector must be at 28 volts.  I noticed in the more recent 430W installation manual that only the "A" high power units have this 28-volt requirement.  Does anyone know when the change happened?  For instance, do all of the old non-waas units have this 28-volt communication requirement, or is there a mod that makes some of the non-w units (hopefully mine) 14-volt capable?  The placard on the unit says that it is up to mod level 5, and I have a list of all of the various service bulletins that have been applied to it, in case any of that might help.  



   	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	
[b]

email(at)jaredyates.com
Guest

Posted: Sat Apr 16, 2011 7:22 am Post subject: GNS430 Communication Voltage- 14v or 28v?

On a somewhat related note, how are you folks wiring the power inputs?  I notice on the schematic that they show the redundant power sources tied together downstream of the circuit protection.  Wouldn't it make more sense to run a separate fuse for each of the redundant sources?  This would mean 6 fuses instead of 3, but wouldn't it eliminate a single failure point?

 

On Sat, Apr 16, 2011 at 11:10 AM, Jared Yates <email(at)jaredyates.com (email(at)jaredyates.com)> wrote:

[quote] For anyone else who might have this same question, I've just found the answer in a newer installation manual the Bob L. sent me.  Garmin changed the part numbers, so part number 011-00280-10 accepts 11-33 volts on all inputs, while part number 011-00280-00 requires the converter.  Fortunately mine is the -10 series. 



 

On Sat, Apr 16, 2011 at 1:34 AM, Jared Yates <email(at)jaredyates.com (email(at)jaredyates.com)> wrote:

 	  Quote: 	
		    I'm wiring my 14-volt panel, which includes a Garmin GNS430, non-WAAS "legacy" version, and I am looking for advice from someone who is familiar with the development timeline.  I have an older hard copy of an installation manual that says that the aircraft power on the P4002 (Communications) connector must be at 28 volts.  I noticed in the more recent 430W installation manual that only the "A" high power units have this 28-volt requirement.  Does anyone know when the change happened?  For instance, do all of the old non-waas units have this 28-volt communication requirement, or is there a mod that makes some of the non-w units (hopefully mine) 14-volt capable?  The placard on the unit says that it is up to mod level 5, and I have a list of all of the various service bulletins that have been applied to it, in case any of that might help.   



   	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	
	




 



[b]

tim2542(at)sbcglobal.net
Guest

Posted: Sat Apr 16, 2011 8:38 am Post subject: GNS430 Communication Voltage- 14v or 28v?

On 4/16/2011 8:19 AM, Jared Yates wrote:      	  Quote: 	
		  On a somewhat related note, how are you folks wiring       the power inputs?  I notice on the schematic that they show the       redundant power sources tied together downstream of the circuit       protection.  Wouldn't it make more sense to run a separate fuse       for each of the redundant sources?  This would mean 6 fuses       instead of 3, but wouldn't it eliminate a single failure point?

         	
     I have seen professional harnesses and all they do is tie (solder     seal) the 2 wires together just outside the connector.  The feeds     are diode isolated in the unit and I believe the intent is to be     able to feed from 2 separate busses on on aircraft that have more     than one power source.  In my case, I used my AUX bus/batt. to     enable my GRT EFIS  and 430w to boot up and prior to engine start     for flight planning etc. Since I used a Avionics switch this also     gives a work around in case that switch fails. There are also     separate feeds for NAV and Comm on these and this gives the     installer some options on when & how to power it all up. The     simplest thing is to just tie them all together and run it to your     Avionics buss.

     

     Tim 

      [quote][b]

email(at)jaredyates.com
Guest

Posted: Sat Apr 16, 2011 9:03 am Post subject: GNS430 Communication Voltage- 14v or 28v?

I have in my notes that I was supposed to wire the inputs to the same bus, but I don't remember the source.  I'm using Z13/8 with a Schottky diode and would be glad to split the power inputs between the main and ebus if that isn't going to cause any problems.  I hadn't considered that option since I thought they all had to be on the same bus.   

On Sat, Apr 16, 2011 at 12:33 PM, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:

[quote]                     On 4/16/2011 8:19 AM, Jared Yates wrote:      	  Quote: 	
		  On a somewhat related note, how are you folks wiring       the power inputs?  I notice on the schematic that they show the       redundant power sources tied together downstream of the circuit       protection.  Wouldn't it make more sense to run a separate fuse       for each of the redundant sources?  This would mean 6 fuses       instead of 3, but wouldn't it eliminate a single failure point?

         	


     I have seen professional harnesses and all they do is tie (solder     seal) the 2 wires together just outside the connector.  The feeds     are diode isolated in the unit and I believe the intent is to be     able to feed from 2 separate busses on on aircraft that have more     than one power source.  In my case, I used my AUX bus/batt. to     enable my GRT EFIS  and 430w to boot up and prior to engine start     for flight planning etc. Since I used a Avionics switch this also     gives a work around in case that switch fails. There are also     separate feeds for NAV and Comm on these and this gives the     installer some options on when & how to power it all up. The     simplest thing is to just tie them all together and run it to your     Avionics buss.

     

     Tim 

       	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




[b]

email(at)jaredyates.com
Guest

Posted: Mon Apr 18, 2011 10:31 am Post subject: GNS430 Communication Voltage- 14v or 28v?

I found the source that I was talking about earlier.  It's on page H-12 of the 430W manual that Bob has on his site.  The note says "If the aircraft has multiple power buses, it is recommended that all GNS 430W power inputs be connected to the same bus."  I wonder why they would suggest that?  Has anyone else separated the two inputs over a main bus and an AEC E-bus and had good results?  Also, I did notice in the fine print that the power connections to the P4006 connector only drive the superflag functions, so I don't need to hook them up.

 

On Sat, Apr 16, 2011 at 1:00 PM, Jared Yates <email(at)jaredyates.com (email(at)jaredyates.com)> wrote:

[quote] I have in my notes that I was supposed to wire the inputs to the same bus, but I don't remember the source.  I'm using Z13/8 with a Schottky diode and would be glad to split the power inputs between the main and ebus if that isn't going to cause any problems.  I hadn't considered that option since I thought they all had to be on the same bus.   

 

On Sat, Apr 16, 2011 at 12:33 PM, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:

 	  Quote: 	
		                        On 4/16/2011 8:19 AM, Jared Yates wrote:      	  Quote: 	
		  On a somewhat related note, how are you folks wiring       the power inputs?  I notice on the schematic that they show the       redundant power sources tied together downstream of the circuit       protection.  Wouldn't it make more sense to run a separate fuse       for each of the redundant sources?  This would mean 6 fuses       instead of 3, but wouldn't it eliminate a single failure point?

         	


     I have seen professional harnesses and all they do is tie (solder     seal) the 2 wires together just outside the connector.  The feeds     are diode isolated in the unit and I believe the intent is to be     able to feed from 2 separate busses on on aircraft that have more     than one power source.  In my case, I used my AUX bus/batt. to     enable my GRT EFIS  and 430w to boot up and prior to engine start     for flight planning etc. Since I used a Avionics switch this also     gives a work around in case that switch fails. There are also     separate feeds for NAV and Comm on these and this gives the     installer some options on when & how to power it all up. The     simplest thing is to just tie them all together and run it to your     Avionics buss.

     

     Tim 

       	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




	


 



[b]

tim2542(at)sbcglobal.net
Guest

Posted: Mon Apr 18, 2011 4:56 pm Post subject: GNS430 Communication Voltage- 14v or 28v?

On 4/18/2011 11:26 AM, Jared Yates wrote:

 	  Quote: 	
		   I found the source that I was talking about earlier.  It's on page 

 H-12 of the 430W manual that Bob has on his site.  The note says "If 

 the aircraft has multiple power buses, it is recommended that all GNS 

 430W power inputs be connected to the same bus."  I wonder why they 

 would suggest that?  Has anyone else separated the two inputs over a 

 main bus and an AEC E-bus and had good results?  Also, I did notice in 

 the fine print that the power connections to the P4006 connector only 

 drive the superflag functions, so I don't need to hook them up.



I believe it is Bob? at TCW that sells the power conditioner/backup 
	


supply unit. He told me that is how it is suppose to work. If you look 

at his website he has a schematic that shows the two power busses hooked 

up to different pins in the 430.

See:  

http://tcwtech.com/Installation%20instructions%20model%20IBBS-rev1.9.pdf

Tim

email(at)jaredyates.com
Guest

Posted: Mon Apr 18, 2011 6:05 pm Post subject: GNS430 Communication Voltage- 14v or 28v?

Bob, thanks for your suggestion.  I was originally planning to put them all on the ebus, so I'll continue with that route.



On Mon, Apr 18, 2011 at 8:53 PM, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:

 [quote]--> AeroElectric-List message posted by: Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> 

 

 On 4/18/2011 11:26 AM, Jared Yates wrote:

  	  Quote: 	
		   I found the source that I was talking about earlier.  It's on page H-12 of the 430W manual that Bob has on his site.  The note says "If the aircraft has multiple power buses, it is recommended that all GNS 430W power inputs be connected to the same bus."  I wonder why they would suggest that?  Has anyone else separated the two inputs over a main bus and an AEC E-bus and had good results?  Also, I did notice in the fine print that the power connections to the P4006 connector only drive the superflag functions, so I don't need to hook them up.

  

 	


 I believe it is Bob? at TCW that sells the power conditioner/backup supply unit. He told me that is how it is suppose to work. If you look at his website he has a schematic that shows the two power busses hooked up to different pins in the 430.

  See:  http://tcwtech.com/Installation%20instructions%20model%20IBBS-rev1.9.pdf

 Tim



 

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