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D-Sub carrying current

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rparigoris

Joined: 24 Nov 2009
Posts: 796

Posted: Fri Nov 27, 2020 7:33 am Post subject: D-Sub carrying current

Hi Group Two D-Sub questions: 1) Is it OK to use only 1 D-Sub machined and gold plated pin to carry current to my 5 amp circuit breaker used to control overvoltage on my B&C LR3D regulator (crowbar)? 2) I have another circuit that will carry up to 8 amps. I want to split the load between two D-Sub pins. I remember reading about using a resistor on both pins so the difference in resistance of the two pins would be much closer. Question) what value resistor and how many watt capacity? Thx. Ron P.

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nuckolls.bob(at)aeroelect
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Posted: Fri Nov 27, 2020 8:43 am Post subject: D-Sub carrying current

At 09:33 AM 11/27/2020, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com>



 Hi Group Two D-Sub questions: 1) Is it OK to use only 1 D-Sub machined and gold plated pin to carry current to my 5 amp circuit breaker used to control overvoltage on my B&C LRD regulator (crowbar)? 	


   Yes



  	  Quote: 	
		   2) I have another circuit that will carry up to 8 amps. I want to split the load between two D-Sub pins. I remember reading about using a resistor on both pins so the difference in resistance of the two pins would be much closer. Question) what value resistor and how many watt capacity? Thx. Ron P.

 	




  http://www.aeroelectric.com/Pictures/Schematics/Paralleled_DSub_Pins.pdf 



   This is a paralleling technique proposed and

   approved on the GQM163 SSST target and

   later adopted in power distribution components

   of the B4000 bizjet.



   There are variations on this theme which demand a

   few more details on your proposed application.



   What are the connections to pins on both

   sides of the interface? Are we talking about

   a 8A continuous load?



 

   Bob . . .



   Un impeachable logic: George Carlin asked, "If black boxes

   survive crashes, why don't they make the whole airplane

   out of that stuff?"

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rparigoris

Joined: 24 Nov 2009
Posts: 796

Posted: Fri Nov 27, 2020 9:19 am Post subject: Re: D-Sub carrying current

Hi Bob Thx. for reply. 8 amp continuous load perhaps 10 minutes per flight which is for cooling fans FWF about 30" forward of connector, aft of connector is a switch about 10" away but could easily use 12" of #22 wire. If a resistor were to be used for two wires and 4 amps each, would it need to be rated for 58 watts? I like your 12" of #22 wire solution!  Ron P.

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rparigoris

Joined: 24 Nov 2009
Posts: 796

Posted: Fri Nov 27, 2020 10:21 am Post subject: Re: D-Sub carrying current

Hi Bob Forget second half of my question, I see you had written mOhms, not ohms. I missed the m. Ron P.

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