Question about GND

7 years 4 weeks ago #29528332 by infoa
Question about GND was created by infoa
I have a question, if I use a tester on a controller disconnected, I can see continuity between GND(PwrCtrl) and GND(Vmot), however in page 4 from sdc2130 datasheet both sources are separated.

1.- Can I have problems if I use 12V(PwrCtrl) to supply other electronics circuits ?

2.- Can I get in problems if I use PwrCtrl and Vmot to supply more than 2 controllers at the same time ?
That is to say, if I use the same power supply 12V for 2 or more controllers, or if I use the same power supply (24V) for 2 or more controllers.

3.- How I can decouple PwrCtrl 12V from supply other electronics ? Is it necessary ? Can I use a capacitor for this ?


Thank you,

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7 years 4 weeks ago #29528333 by Griffin Baker
Replied by Griffin Baker on topic Question about GND
There should not be any kind of continuity across those terminals.

If they are shorted on those lines, then the controller is defective.

Send email to This email address is being protected from spambots. You need JavaScript enabled to view it. for RMA instructions. If the unit is within the 90 of purchase, it will be under warranty.

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7 years 4 weeks ago #29528334 by infoa
Replied by infoa on topic Question about GND
Excuse Me,

I could have a problem with my explication. I attach you a image with this lines showing in green color... Point A (GND on PwrCtrl pins) and Point B (GND on Vmot pins) are join...show contiunity if I use a tester.

¿ Can you confirm your response ? [ Apologies if I made a mistake in my previous post ]

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7 years 4 weeks ago #29528335 by Griffin Baker
Replied by Griffin Baker on topic Question about GND
Okay, thanks for the explanation. Yes, the gnd on both the power control and the vmot are on the same path, so that is accurate.

The power control is not part of the output circuit, so whether or not you use that with another controller at the same time I don't foresee as a problem. This allows you to make configuration changes.

The drawback to using the same supply on 2 controllers at once, is the current flow to both will drain the battery faster during operations.

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