D0 Power supplies

2-3 types in paper

Type 1: +-5.6 kV 1 mAmp
Type 2: +2kV 3 mAmp

For 500/2 PMTs per channel/48 channels per crate = 6 crates

Can set a max voltage and max current - trips the supply
max voltage can be set by knob
max current in software
watchdog shuts off if you don't query the supply through the I/O
interlock (requires a constant 5V signal)
can also group channels so that if one trips, they all trip