Fostex PD-4 Owner's Manual page 88

Fostex
PD-4 DIGITAL AUDIO RECORDER_
DC IN wiring
The XLR-4-32 type external power supply connector is wired as follows:
1
GND
2 NC
3
WEamm
4
Figure 32
DC IN wiring
CAUTION: Connecting the power plug incorrectly or into an AC outlet with incorrect voltage
may cause serious damage to the PD-4.