EPIQ 5 & 7 Training Manual
© 2016 Conquest Imaging
24
VPPM Block Diagram
Essential and Non-Essential System Voltages
Voltages
Essential? Function
VDC_SYS
Yes
Functions as an interim DC voltage.
During AC operation, the voltage is +24
Vdc. During battery operation, the
voltage varies from +21 Vdc to +28.7
Vdc to support Sleep Mode. Provides
input for the ATX power supply to
generate voltages for the motherboard
and peripherals. Also supports the
video monitor.
+12 VDC
Yes
Provides power to the disk drives and
cooling fans. Provides power to other
lower-voltage power supplies on the
motherboard.
+5 VDC
Yes
Provides logic power for the disk
drives. Also, provides 5V_STBY when
working under battery power.
Optional
Batteries
Battery Charge and
Control
24VDC
Converter
5V STBY
Converter
ATX
AC Inverter
Power
Present
ATX
24V BATTERY
AC Present
AC out for peripherals
AC out for peripheral.
The LEDs on the back of
the VPPM module
indicate:
AC Power present
24 V – VDC-SYS ready
ATX – PC/Digital
voltages ready
Battery status
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