CAUTION
Before installing assemblies in
the the
computer
or
bus
expander
ac-
cessory
card
slots, ensure
the
total
maximum power consumed by each
accessory
and
I/O
card
for each voltage does
not
exceed
the
power
available
at
each voltage for
the
backplane.
If
the
accessory
and
I/O
cards
installed require more power
than
is available, damage
to
the
accessory
/1/0
card
or
computer/bus
expander
may result.
Figure 3-1 is a block diagram of
the
0950-1760 power supply.
Commercial
Line
V
Sel
bridge
~
~
+12V
~~
post
reg.
Fuse
Input
Section
rectifier
~--~
&
energy
storage
Transformer
Figure
3-1. Power Supply Block
Diagram
+5V
+12V
-12V
--
~
reset
t=
+5V
PURESET
.
't
.
circul
ry + 12V
Ac
line voltage is supplied
to
the
input
section
through
the
power cord. Functions
of
the
input
section are:
• High Frequency Filtering
• Fuse
• On-Off Switching
•
Input
Voltage Selection
• Low Frequency Filtering
38
Functional Description
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