Power Supply - Data General NOVA 4/C Field Engineering Maintenance Manual

Data General Corporation (DGC) has prepared this manual for use by DGC personnel and customers as a guide to the proper installation, operation, and
maintenance of DGC equipment and software. The drawings and specifications contained herein are the property of DGC and shall neither be reproduced in whole or
in part without DGC's prior written approval nor be implied to grant any license to make, use, or sell equipment manufactured in accordance herewith.
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CABLE CONNECTOR
Figure 1.5 5-Slot chassis (rear view)
The VNR unit converts power from the ac supply line to
non-regulated dc power, which it furnishes to the power
supply board via an internal cable. The internal cable
1/O e Carries ac power from the VNR unit to the fan module
CPU e Connects the front console switches and indicators to
e Connects the power switch to the VNR unit.
DG-06192 When the battery backup option is present, the VNR unit
contains a battery that supplies power to the battery backup
circuits in the power supply board.
Figure 1.6 Slot assignment diagram 5-slot chassis
POWER SUPPLY The power supply board regulates the dc voltages from the
VNR unit and supplies the required voltages to the
Each chassis has its own power supply, which is available remainder of the system via the etch on the backpanel. It
with or without battery backup. also generates the system clocks and supplies them to the
system printed circuit boards via the backpanel.
16-Slot Power Supply
For more information about the operation of the 16-slot
The 16-slot power supply and distribution system consists power supply, see Part II, Chapter 6, and Part III, Chapter
of a VNR (voltage non-regulated) unit that is vertically 9.
mounted to the rear of the chassis and a slide-in power
supply printed circuit board which plugs into the chassis
backpanel.
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