Nimit,
The current DMPs do NOT have a POWER ON\OFF switch.
They are either Powered or Non-Powered when plugged in.
As for controlling via DMM, Power Management is not an option
at this time.
You have an option to plug DMPs in to Network managed power
strips and use that option to control the power supplied to the DMPs
and LCDs.
If this answers your question, Please take time to mark this
discussion answered & rate the response.
Thank You!
T.