PDM15 output voltage readings

Discussion and support for MoTeC Power Distribution Modules

PDM15 output voltage readings

Postby ehmfree on Tue Apr 13, 2021 9:56 am

Hi there,
I have a PDM15.
The "B" connector PDM outputs (PDM6,7,8) - each supplied by the appropriate 2 pins has voltage readings of around 3.4-3.6V relative to chassis ground. This is the reading I get when I turn all outputs off via PDM manager. I also confirmed this by unplugging the "B" connector and powering up the PDM - each of the affected pins on the PDM side reads 3.4-3.6V relative to ground with the PDM outputs programmed to off.

Is this normal? The other output pins on the "A" connector all read around 0v when the output is off.

Thanks in advance.
ehmfree
 
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Re: PDM15 output voltage readings

Postby adrian on Tue Apr 13, 2021 5:03 pm

That is correct, with no load the output driver can float to a few volts. If you put any load on it at all it will drop to zero.
adrian
MoTeC
 
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