Power Supply - ground connections

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trimix
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Power Supply - ground connections

Post by trimix » Sun Dec 06, 2015 3:13 pm

Please clarify some terminology regarding ground connections.
All current (that I've seen) Module Builders guides break down the power connections like this:
+15v................Pin1
Module/GND......Pin2
Earth/PAN.........Pin3
-15v.................Pin4

I'm connecting a bench top power supply. +/15v no problem, but I get hung up on the terminology for the ground connections.
- Which ground should go from pinX to the power supply ground connection? Which leaves another ground to be connected to ...what?
ie.: do I use pin2 or pin3? :despair:

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Re: Power Supply - ground connections

Post by Synthbuilder » Mon Dec 07, 2015 3:58 am

trimix wrote:do I use pin2 or pin3?
Both - they are connected together at the power supply. If you are using the Dizzy then both the pin 2 and pin 3 connections will go back to your power supply's 0V connection. That is, take two wires from the Dizzy back to the one 0V pin on your power supply.

Tony

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trimix
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Re: Power Supply - ground connections

Post by trimix » Mon Dec 07, 2015 12:07 pm

Synthbuilder wrote:
Both - they are connected together at the power supply. If you are using the Dizzy then both the pin 2 and pin 3 connections will go back to your power supply's 0V connection. That is, take two wires from the Dizzy back to the one 0V pin on your power supply.

Tony
Thanks - And on the Dizzy there is an "earth" solder connection on the board. Tie that back to PS also?
Sorry for the questions...but this will be the core of the system. If I'm not certain, I gotta ask!

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Re: Power Supply - ground connections

Post by Synthbuilder » Tue Dec 08, 2015 1:36 pm

trimix wrote:And on the Dizzy there is an "earth" solder connection on the board. Tie that back to PS also?
Assuming you will be tying your PSU's 0V to safety earth you can ignore the individual 'earth' pads on the Dizzy boards.

Tony

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Post by Flareless » Wed Dec 16, 2015 2:01 pm

I have a Dotcom QPS2 power system for 8 modules. I use it as a bench test power supply. I'd like to put an MOTM / Oakley 4 socket connector on one of the wires so I can test Oakley modules with it.

My question is about the Ground (Earth) lines. There is only one ground wire from the power supply. Do I split it and attach it to pins 2 and 3?
Rich

Lower West Side Studio

What can this strange device be? When I touch it, it gives forth a sound - Neil Peart

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Post by Synthbuilder » Thu Dec 17, 2015 11:49 am

Flareless wrote:There is only one ground wire from the power supply. Do I split it and attach it to pins 2 and 3?
Yes, pins 2 and 3 should be both be connected to the single ground wire.

If you have a Dizzy and would like to use the Dotcom power supply just take the ground wire and put it into pin 2 of the screw terminal. Then solder a wire link into position R1 - this will connect pins 2 and 3 together.

Tony

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Post by Flareless » Thu Dec 17, 2015 12:23 pm

Thanks Tony! It works perfectly.
Rich

Lower West Side Studio

What can this strange device be? When I touch it, it gives forth a sound - Neil Peart

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