Publication No. PPC11A-HRM/1
Specifications 129
A.3 Reliability (MTBF)
The following table shows the predicted values for reliability as Mean Time Between
Failures (MTBF) and Failures Per Million Hours (fpmh) for the PPC11A as of
20
th
February 2018.
Table A-4 Reliability (MTBF)
Environment
Fail Rate
(fpmh)
MTBF
(Hours)
Ground Benign 20°C
1.773376
563,896
Ground Benign 30°C
2.394554
417,614
Ground Fixed 40°C
12.027729 83,141
Ground Mobile 45°C
27.403381 36,492
Naval Sheltered 40°C
14.022778 71,313
Naval Unsheltered 45°C
30.962488 32,297
Airborne Inhabited Cargo 55°C
27.832495 35,929
Airborne Inhabited Fighter 55°C
35.269051 28,353
Airborne Uninhabited Cargo 70°C
75.329887 13,275
Airborne Uninhabited Fighter 70°C
95.154252 10,509
Airborne Rotary Wing 55°C
76.746352 13,030
Space Flight 30°C
2.041334
489,876
The predictions are carried out using MIL-HDBK-217F Notice 2, Parts Stress method.
To complement the 217 failure rates, some manufacturers’ data is included where
appropriate; πQ values have been modified per the ANSI/VITA 51.1-2008 (R2013)
Specification. This prediction relates only to the electronic components; mechanical
components are not included.
These failure rates are based only on the components and connectors fitted to the
PPC11A at delivery and take no account of user fitted mezzanines.
A.4 Mechanical Specification
Table A-5 Mechanical Construction
Weight
Level 4 and 5 (aluminum) ≈ 755g including the heatsink but excluding any mezzanines
Level 1 to 3 ≈ 675g including the heatsink and front panel but excluding any mezzanines
Dimensions
The air-cooled PPC11A is constructed on a multi-layer 6U Eurocard and conforms to the dimensions specified in IEEE1101.1.
The conduction-cooled PPC11A is constructed on a multi-layer 6U Eurocard and conforms to the dimensions specified in IEEE
1101.2
Wedgelocks
Correct adjustment requires a calibrated torque wrench with a hexagonal head of size 2.5 mm, set to between 0.8 and 1.0 Nm
(0.9 Nm/8 in-lb recommended)
Содержание PPC11A
Страница 1: ...Hardware Reference Manual PPC11A 6U VME Single Board Computer Edition 1 Publication No PPC11A HRM 1 ...
Страница 27: ...Publication No PPC11A HRM 1 Functional Description 27 Figure 4 2 Block Diagram T2081 ...
Страница 113: ...Publication No PPC11A HRM 1 Connectors 113 Figure 6 2 Rear Connector Position ...