Question referring to window switch TC wiring diagram on page 4.

http://www.zex.com/Instructions/Files/ZEX169.pdf

In the installation manual, it specifies the power to the TC Window Control unit as +12VDC VD, and then power to the NMU as +12VDC Arming.

My question is can these be drawn off the same +12VDC activated by the arming switch? Not sure why the different designations (VD vs. Arming) and the manual (and tech support) weren't sure what that was either.

I'm an electrical engineer, so yeah, i know 12V is 12V, but i'm more concerned about proper sequencing of the power (i.e. the TCWC has to come up BEFORE the NMU, etc...)

Thanks
Dan