Vac Output
The power supply provides a filtered, fused, ac output
that
is
switched
on
and off with the main power switch. The maximum
current available
at
this output
is
0.75 A. The receptacle
provided
at
the rear of the power supply for this ac output is a
nonstandard connector designed to be used only for the
IBM
Monochrome Display.
Overvoltage/Overcurrent Protection
The system power supply employs the protection features which
are described below.
Primary (Input)
The
following table describes the primary (input voltage)
protection for the system-unit power supply.
Voltage
(Nominal
Vac)
Type
Protection
Rating
(Amps)
120
Fuse
2
220/240
Fuse
1
Secondary (OUtput)
On
overvoltage,
the
power supply is designed
to
shut down all
outputs when either the
+5 V dc
or
the +12 V dc output exceeds
200%
of
its maximum rated voltage.
On
overcurrent, the supply
will turn off if any output exceeds
130%
of
its nominal value.
Power
Supply
3-5
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