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Module I/O Specifications

A28 Power Supply

A28 Power Supply
Thisspec is for the complete assembly which includes the transformer and plug-in boards.

Input

❒Overvoltage protected.
❒+21 Volts and +25 Volt supplies always on, all other supplies controlled with front
panel power switch.
❒Short circuit protected.
❒Thermal shutdown capability.
❒Two supply short protection (shorting +25 unregulated is protected only by fuse).
❒Fan turns off with power down.
❒Fan speed is a function of temperature.
Outputs
Nominal Line Voltages: 100, 120, 22, 240
Tolerance: +7%, -14%
Frequency Range: 48 to 440 Hz
Supply
Voltage Tolerance
incl. load limit Line Rel.
Ripple RMS Max CW
SpuraRMS
a. This is the spec for rates greater than 60 kHz. For rates less then 60 kHz the spec increases
by 6 dB per octave until we reach a maximim of 100µV at rates less than 600 Hz.
Totalnoise 20
Hz-20 MHz Noise nV/√Hz
@20 kHz
+38 V 1% .3A .1 mV 1µV 1mV 400
+15 V 1% 4.2 A .1 mV 1µV .3 mV 150
-15 V 1% 2.6 A .1 mV 1µV .3 mV 150
+5.2 V 1% 12.8 A .1 mV 1 µV .1 mV 50
-5/2 V 4% 3.0 A .1 mV 1 µV .1 mV 50
+12 Aux V 1% 2.0 A .1 mV 1µV .2 mV 100
+25 Unreg -10% +60% 3A fuse 1V 10 µV
+21 V 1% 1 A Three terminal regulator