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Published byMervin Maxwell Modified over 8 years ago
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Amey Rane Madhur Srivastava Tejas Pandit Varun Sivakumar
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Safety & Reliability Issues Safety – Don’t want to electrocute users Don’t want to harm connected appliances Reliability – RF Reliability Issues (interference, etc) Sensor failures
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Components Linx Transceiver (TRM-315-LT) Freescale Micro-Controller (MC9S12A512) Fairchild Semi-ConductorVoltage Regulator (7805)
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Linx Transceiver Table 2.0.1 Linx Transceiver (TRM-315-LT) ParameterValueComments C1C1.011 to 100 transistors, Linear, MOS TT 3.8Temp 70 ° C C2C2.00347 functional pins EE 2.0Ground Fixed QQ 10Commercially Manufactured LL 1.0>2 Years in production P.448Failures per 10 6 hours MTTF2,232,142 hours = 254 Years
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Freescale Micro-Controller Table 2.0.2 Freescale Micro-Controller (MC9S12A512) ParameterValueComments C1C1.28CMOS, 16 bit TT 1.5Junction Temp 100 ° C C2C2.01940 functional pins EE 2.0Ground Fixed QQ 10Commercially Manufactured LL 1.0>2 Years in production P 4.58Failures per 10 6 hours MTTF218,340 hours = 24 Years
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Voltage Regulator Table 2.0.3 Fairchild Semi-Conductor Voltage Regulator (7805) ParameterValueComments C1C1.011 to 100 transistors, Linear, MOS TT.1Temp 25 ° C C2C2.00123 functional pins EE 2.0Ground Fixed QQ 10Commercially Manufactured LL 1.0>2 Years in production P.034Failures per 10 6 hours MTTF29,411,764 hours = 3357 Years
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Criticality Levels Low: The management system no longer works. The data may not be collected/displayed correctly or valid and the user may not be able to send commands. Medium: The devices plugged into our adapter may not be provided correct voltage/current and they may not function. High: Devices or Users may be harmed.
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FMECA Table Still being made
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Risk Mitigation Fuses at source and at solid state relays Ground body of adapters SSRs offer improved system reliability because they have no moving parts or contacts to degrade Checks for validity of communication
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Questions
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