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Reliability – Rockwell Automation 1606-XLS240F, -XLS240F-D Power Supply Reference Manual User Manual

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All parameters are specified at 48V, 5A, 230Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.

Rockwell Automation Publication 1606-RM045A-EN-P — March 2014

11

Bulletin 1606 Switched Mode Power Supplies

10. Reliability

AC

100V

AC 120V

AC 230V

Lifetime expectancy

*)

57 000h

67 000h

81 000h

at 48V, 5A and 40°C

118 000h

112 000h

118 000h

at 48V, 2.5A and 40°C

161 000h*)

188 000h*)

228 000h*)

at 48V, 5A and 25°C

MTBF

**)

SN 29500, IEC 61709

539 000h

566 000h

606 000h

at 48V, 5A and 40°C

932 000h

979 000h

1 048 000h

at 48V, 5A and 25°C

MTBF

**)

MIL HDBK 217F

342 000h

349 000h

349 000h

at 48V, 5A and 40°C; Ground
Benign GB40

467 000h

478 000h

478 000h

at 48V, 5A and 25°C; Ground
Benign GB25

*) The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime

expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated according to the
capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years
(131 400h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices.

**) MTBF stands for Mean Time Between Failure, which 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.

The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means that
statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it is impossible to determine if the failed
unit has been running for 50 000h or only for 100h.