Appendix A
Specifications
©
National Instruments Corporation
A-3
NI PS-15 Power Supply User Manual
AC Input
AC input
Nominal AC 100 –120 V/200 –240 V
Auto-select input, TN-, TT-, IT-Mains, refer to Figure A-3
AC input range
90–132 V
AC
180–264 V
AC
85–90 V
AC
264–300 V
AC
100–120 V range, continuous operation
200–240 V range, continuous operation
Short term or with output derating
<0.5 s
Input frequency
Nominal 50–60 Hz
±6%
DC input
Not allowed
—
Typical/
Maximum
AC
100 V
AC
120 V
AC
230 V
Input current
Typical
2.34 A
2.05 A
1.23 A
At 24 V, 5 A refer to Figure A-3
Power factor
*
Typical
0.58
0.56
0.47
At 24 V, 5 A refer to Figure A-3
Crest factor
**
Typical
2.9
3.1
3.7
At 24 V, 5 A
Start-up delay
Typical
740 ms
900 ms
720 ms
Refer to Figure A-4
Rise time
Typical
Typical
8 ms
25 ms
8 ms
25 ms
8 ms
25 ms
0 mF, 24 V, 5 A, refer to Figure A-4
5 mF, 24 V, 5 A, refer to Figure A-4
Turn-on
overshoot
Maximum
400 mV
400 mV
400 mV
Refer to Figure A-4
Turn-on voltage
Typical
75 V
AC
75 V
AC
—
Steady-state value, refer to Figure A-3
Shut-down
voltage
Typical
55 V
AC
55 V
AC
—
Steady-state value, refer to Figure A-3
*
The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.
**
The crest factor is the mathematical ratio of the peak value to the RMS value of the input current waveform.
