DMC60 Input Signal Ground Isolation

[Wrencher]

Is the Input Signal Ground Isolated from the Power Ground on the DMC60 Digital Motor Controller?

Looked at the schematic link provided under the product information and it is not clear.

DMC60 shows just two leads, Signal and Ground.

We would be providing 5v pulses on the input conforming to the RC-Servo specification 1 - 2 ms.

[JColvin]

Hi @Wrencher,

I have asked another engineer much more familiar with the DMC60 for the details on the grounds.

Thanks,
JColvin

[JColvin]

Hi @Wrencher,

Here is the response from the engineer who made the DMC60:

Yes it’s isolated from power ground by the CAN transceiver. The schematic that’s published shows some components inside of a red rectangle and states “Load on MCB1, not MCB2”. However, that statement is incorrect. Those components are not loaded on the DMC60 and the servo input goes through the CAN transceiver.  This does prevent high current from flowing over the signal ground lead, which is probably what the customer is concerned about.

Thanks,
JColvin

[Wrencher]

Yes, current in the signal ground path was what we are concerned about.  Since the ground is isolated we have no issues.  Thanks for the detailed response.