Yamaha MMP1 Setup Manual page 21

Applying external DC power unit
When connecting a backup power supply to MMP1, connect it to "BACK DC INPUT" on the
back side of the unit.
External power supply for MMP1 specifications
-
DC output voltage: 12V
-
DC output wattage: 45W
-
DC output connector: 4P XLR connector (XLR-4-32)
[Redundant DC Power Unit]
【Pin assignment of external power supply for MMP1】
21