Appendix A
Specifications
©
National Instruments Corporation
A-9
NI PS-16 Power Supply User Manual
Figure A-11.
NI PS-16 Efficiency and Losses
Reliability
The lifetime expectancy shown in Table A-1 indicates the service life of the
NI PS-16, and is determined by the lifetime expectancy of the built-in
electrolytic capacitors. Lifetime expectancy is specified in operational
hours. Lifetime expectancy is calculated according to the capacitor’s
manufacturer specification. The prediction model allows a calculation of up
to 15 years from the date of shipment.
MTBF (Mean Time Between Failure) is calculated according to statistical
device failures and indicates reliability of a device. It is the statistical
representation of the likelihood of a unit to fail and does not necessarily
represent the life of a product.
Efficiency vs. output current at 24 V
Losses vs. output current at 24 V
Efficiency
2
89
90
91
88
92%
100 V
ac
120 Vac
12A
4
8
10
Output Current
6
Power Losses
0
2
4
8
10
12A
0
4
12
16
24
28
32 W
Output Current
8
6
20
Efficiency vs. input voltage, 24 V, 10 A
Losses vs. input voltage, 24 V, 10 A
Efficiency
88
89
90
Input Voltage
91
92%
9
12
15
18
21
Input Voltage
24
27 W
120
85
155
190
225 260 Vac
120
85
155
190
225 260 Vac
230 V
ac
Power Losses
120 Vac
100 Vac
230 Vac
100 Vac
120 Vac
230 Vac
