Appendix A
Specifications
NI PS-15 Power Supply User Manual
A-10
ni.com
Dielectric Strength
Notes
The output voltage is floating and has no ohmic connection to ground.
To fulfill the PELV requirements according to EN60204-1 § 6.4.1, we recommend that
either the + pole, the – pole or any other part of the output circuit should be connected
to the protective earth system. This helps to avoid situations in which a load starts
unexpectedly or can not be switched off when unnoticed earth faults occur.
Table A-1.
Reliability Specifications
Minimum/
Maximum
AC
100V
AC
120V
AC
230V
Lifetime expectancy
Minimum
52,000 hours
58,000 hours
72,000 hours
40 °C, 24 V, 5 A
Minimum
27,000 hours
34,000 hours
42,000 hours
40 °C, 24 V, 6 A
Minimum
135,000 hours
128,000 hours
144,000 hours
40 °C, 24 V, 2.5A
Minimum
142,000 hours
15 years
15 years
25 °C, 24 V, 5 A
MTBF SN 29500,
IEC 61709
—
638,000 hours
661,000 hours
869,000 hours
40 °C, 24 V, 5 A
542,000 hours
562,000 hours
739,000 hours
40 °C, 24 V, 6 A
1,077,000 hours
1,111,000 hours
1,495,000 hours
25 °C, 24 V, 5 A
MTBF MIL HDBK 217F
—
552,000 hours
546,000 hours
574,000 hours
40 °C, 24 V, 5 A,
Ground Benign
GB40
497,000 hours
491,000 hours
517,000 hours
40 °C, 24 V, 6 A,
Ground Benign
GB40
788,000 hours
775,000 hours
800,000 hours
25 °C, 24 V, 5 A,
Ground Benign
GB25