PDP Reading Incorrectly over CAN

[Jon Stratis]

Unfortunately, the PRO user manual doesn't state any expectations for reading channel current.

I would guess that, in this case, this current sensor is essentially floating, which means the value it returns is meaningless. Try putting a breaker in the channels that are reading incorrect and let us know if they are still incorrect. Then try hooking up a low-current device to the channels and see if they still read incorrect. It's just a guess, but I think putting a breaker in will be enough to stabilize the current sensor and give you the expected result.

[Jared]

Originally Posted by Jon Stratis

Then try hooking up a low-cost device to the channels and see if they still read incorrect. It's just a guess, but I think putting a breaker in will be enough to stabilize the current sensor and give you the expected result.

Be careful and don't plug a motor straight into the PDB, it'll fry the current sensor!

[Tom Line]

Originally Posted by Jared

Be careful and don't plug a motor straight into the PDB, it'll fry the current sensor!

Have you tried this already? It sure seems like the breaker should protect it against over-currenting the sensor, though I don't want to be the guinea pig to prove it.

[ozrien]

Do not connect a motor directly to the PDP...

Warning: Inductive loads (motor, compressor) must have a power management device (motor
controller, PCM, spike) between itself and the PDP. No inductive loads (motor, compressor)
may be directly connected to the PDP channels as this can damage current sense circuitry.

Bottom of section 2.2.1 and 2.2.2.
PDP User Manual
http://www.crosstheroadelectronics.c...ol_system.html