About Differential voltage

In my current project, between the RMC150 Control Output drv cmn and 24v power supply command there is 7.4v Differential voltage .
Is it ok? Some electrical Electronic components including the Differential voltage limit,when the volt is more than a certain value, the Electronic components
may be damaged.

The RMC 150 Control Output common and the 24 V common should be connected together somehow in the wiring, and then the difference should be very small.