I was hunting for a schematic to see if I could wire one of my Sennheiser MKE2 directly to an XLR connector instead of using the Sennheiser MZA-900P and found the information I was looking for on the Theatre Sound list.

Theatre Sound List – 48v PSU for Sennheiser LAVs

Shure – phantom power versus bias voltage
Sennheiser MKE2 wiring PDF
Klay Andersion – Phantom Schematic PDF