Pepperl+Fuchs HiC283 Series Manual Download Page 15

Functional Safety HiC283*

Planning

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3.5

Useful Lifetime

Although a constant failure rate is assumed by the probabilistic estimation this only applies 

provided that the useful lifetime of components is not exceeded. Beyond this useful lifetime, 

the result of the probabilistic estimation is meaningless as the probability of failure significantly 

increases with time. The useful lifetime is highly dependent on the component itself 

and its operating conditions 

 temperature in particular. For example, electrolytic capacitors 

can be very sensitive to the operating temperature.
This assumption of a constant failure rate is based on the bathtub curve, 

which shows the typical behavior for electronic components.
Therefore it is obvious that failure calculation is only valid for components that have 

this constant domain and that the validity of the calculation is limited to the useful lifetime 

of each component.
It is assumed that early failures are detected to a huge percentage during the installation 

and therefore the assumption of a constant failure rate during the useful lifetime is valid.
However, according to IEC/EN 61508-2, a useful lifetime, based on general experience, 

should be assumed. Experience has shown that the useful lifetime often lies within a range 

period of about 8 to 12 years.
As noted in DIN EN 61508-2:2011 note N3, appropriate measures taken by the manufacturer 

and plant operator can extend the useful lifetime.
Please note that the useful lifetime refers to the (constant) failure rate of the device. 

The effective life time can be higher.
The estimated useful lifetime is greater than the warranty period prescribed by law 

or the manufacturer's guarantee period. However, this does not result in an extension 

of the warranty or guarantee services. Failure to reach the estimated useful lifetime 

is not a material defect.

Summary of Contents for HiC283 Series

Page 1: ...ISO9001 2 Functional Safety Switch Amplifier HiC283 Manual...

Page 2: ...ion as well as the supplementary clause Expanded reservation of proprietorship Worldwide Pepperl Fuchs Group Lilienthalstr 200 68307 Mannheim Germany Phone 49 621 776 0 E mail info de pepperl fuchs co...

Page 3: ...terfaces 9 2 3 Marking 9 2 4 Standards and Directives for Functional Safety 9 3 Planning 10 3 1 System Structure 10 3 2 Assumptions 11 3 3 Safety Function and Safe State 12 3 4 Characteristic Safety V...

Page 4: ...Functional Safety HiC283 Contents 4 2021 12...

Page 5: ...Dismounting Disposal The documentation consists of the following parts Present document Instruction manual Manual Datasheet Additionally the following parts may belong to the documentation if applicab...

Page 6: ...derstood the instruction manual and the further documentation Intended Use The device is only approved for appropriate and intended use Ignoring these instructions will void any warranty and absolve t...

Page 7: ...splayed in descending order as follows Informative Symbols Action This symbol indicates a paragraph with instructions You are prompted to perform an action or a sequence of actions Danger This symbol...

Page 8: ...signal lines HiC2831R2 and HiC2832R2 The input controls two passive transistor outputs with a resistive output characteristic The outputs have three defined states low impedance state 1 signal 5 k hi...

Page 9: ...tions see datasheet Pepperl Fuchs Group Lilienthalstra e 200 68307 Mannheim Germany Internet www pepperl fuchs com HiC2831 HiC2832 HiC2831R1 HiC2832R1 HiC2831R2 HiC2832R2 HiC2831R3 HiC2832R3 HiC2831R4...

Page 10: ...y the demand rate for this safety loop is assumed to be higher than once per year The relevant safety parameters to be verified are the PFH value Probability of dangerous Failure per Hour Fault reacti...

Page 11: ...ence A similar factor must be used if frequent temperature fluctuations are expected Do not use more than one input channel of a multi channel device for a safety loop as the channels of the device us...

Page 12: ...ent is present at input I output I and output II are high impedant safe state Table 3 1 Switch settings HiC2831 Switch Position Function Channel I S1 II Normal mode of operation If a low current is pr...

Page 13: ...te Reaction Time The response time for the safety function between input and output is 0 1 ms Load conditions HiC283 8 V 1 k HiC283 R1 24 V 2 k HiC283 R2 24 V 250 HiC283 R3 24 V 4 2 k HiC283 R4 10 mA...

Page 14: ...years MTBF 1 HiC2832 120 years PTC 99 Safety function Inverse mode of operation 2 2 The device can be used in two modes of operation inverse of mode operation and normal mode of operation Normal mode...

Page 15: ...and that the validity of the calculation is limited to the useful lifetime of each component It is assumed that early failures are detected to a huge percentage during the installation and therefore...

Page 16: ...ck the safety function to ensure the expected output behavior 4 1 Configuration Configuring the Device The device is configured via DIP switches The DIP switches for setting the safety functions are o...

Page 17: ...ction of the subsystem at periodic intervals depending on the applied PFDavg in accordance with the characteristic safety values See chapter 3 4 It is under the responsibility of the plant operator to...

Page 18: ...B 150 k lead breakage detection The device must detect an external fault This state is indicated by red LED and the output of the corresponding channel must be in fault state 6 Test the outputs with a...

Page 19: ...er I Multimeter I R U Multimeter I R U Fault 10a 9a 12 15 5a 5b 1 4 SL2 8a SL1 7a 11 14 Supply Supply 24 V DC Power supply I supply Supply Bus RLB RSC Termination Board Zone 0 1 2 Div 1 2 Zone 2 Div 2...

Page 20: ...2 Div 1 2 Zone 2 Div 2 Multimeter I Multimeter I R U Multimeter I R U Fault 10a 9a 12 15 5a 5b 1 4 SL2 8a SL1 7a 11 14 Supply Supply 24 V DC Power supply I supply Supply Bus RLB RSC Termination Board...

Page 21: ...er supply I supply Supply Bus RLB RSC Termination Board Zone 0 1 2 Div 1 2 Zone 2 Div 2 Multimeter I Fault 10a 9a 12 15 5a 5b 1 4 SL2 Multimeter I 1a 1b 2 5 8a SL1 7a 11 14 Multimeter I I Multimeter U...

Page 22: ...ct always replace the device with an original device Reporting Device Failure If you use the device in a safety loop according to IEC EN 61508 it is required to inform the device manufacturer about po...

Page 23: ...ety loop total safety function Probability of failure of components that are in the safety loop HFT Hardware Fault Tolerance MTBF Mean Time Between Failures MTTR Mean Time To Restoration PCS Process C...

Page 24: ...Pepperl Fuchs Quality Download our latest policy here www pepperl fuchs com quality www pepperl fuchs com Pepperl Fuchs Subject to modifications Printed in Germany DOCT 2386F...

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