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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)

Planning

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.
The standard EN/ISO 13849-1:2015 proposes a useful lifetime T

M

 of 20 years for devices 

used within industrial environments. This device is designed for this lifetime. 

Observe that the useful lifetime can be reduced if the device is exposed to the following 

conditions:

highly stressful environmental conditions such as constantly high temperatures

temperature cycles with high temperature differences

permanent repeated mechanical stress (vibration)

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 lifetime 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.

Derating

For the safety application, reduce the number of switching cycles or the maximum current. 

A derating to 2/3 of the maximum value is adequate.

Maximum Switching Power of Output Contacts

The useful lifetime is limited by the maximum switching cycles of the relays under load 

conditions.
For requirements regarding the connected output load, refer to the documentation 

of the connected peripheral devices.

Note

See corresponding datasheets for further information.

Содержание HiC5863

Страница 1: ...ISO9001 3 Functional Safety Relay Module K D0 RSH 1 1E 1 HiC5863 Y1 Manual...

Страница 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...

Страница 3: ...nction 8 2 2 Interfaces 8 2 3 Marking 8 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 Characte...

Страница 4: ...Functional Safety K D0 RSH 1 1E 1 HiC5863 Y1 Contents 4 2021 10...

Страница 5: ...eshooting Dismounting Disposal The documentation consists of the following parts Present document Instruction manual Manual Datasheet Additionally the following parts may belong to the documentation i...

Страница 6: ...ead and understood 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...

Страница 7: ...ges are displayed 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 Th...

Страница 8: ...The device is a relay module that is suitable for safely switching applications of a load circuit The device isolates load circuits up to 30 V and the 24 V control circuit This device mounts on a HiC...

Страница 9: ...ives System specific standards and directives Functional safety IEC EN 61508 part 1 7 edition 2010 Functional safety of electrical electronic programmable electronic safety related systems manufacture...

Страница 10: ...hen usually 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 Fa...

Страница 11: ...operating conditions The DO card must be able to supply a signal current of at least 100 mA SIL 3 application To build a SIL safety loop for the defined SIL it is assumed as an example that this devic...

Страница 12: ...tion according to IEC EN 62061 and EN ISO 13849 1 was carried out If you use the device in machinery safety applications assess the specific application and show that an equivalent safety level will b...

Страница 13: ...L PL Y1 HiCTB16 TRX RAC PL IO16 HiCTB16 YRS RRB AK CC DO16 Y1 HiCTB16 SDC 24C SC RA HiCTB16 SCT 44C SC RA Generally Add 2 5 FIT to the overall failure rate for dangerous undetected failures Exception...

Страница 14: ...20 years for devices used within industrial environments This device is designed for this lifetime Observe that the useful lifetime can be reduced if the device is exposed to the following conditions...

Страница 15: ...ety instructions in the instruction manual 2 Observe the information in the manual 3 Observe the requirements for the safety loop 4 Connect the device only to devices that are suitable for this safety...

Страница 16: ...en to reveal potential dangerous failures that are not detected otherwise Check the function of the subsystem at periodic intervals depending on the applied PFDavg in accordance with the characteristi...

Страница 17: ...ST is flashing 2 VTest 2 24 V DC between terminals 11 and 9 ETS output terminals 2 3 shows 10 LED TST is flashing 3 VTest 3 24 V DC between terminals 12 and 9 ETS output terminals 2 3 shows 10 LED TST...

Страница 18: ...5 and 6 with inverted input polarity ETS output terminals 1 2 shows 10 LED OUT is on Table 5 2 Expected test results for the proof test of KCD0 RSH 1 1E 1 Test No Input or Test Input Output mA 1 VTest...

Страница 19: ...als 1a 5a shows 10 LED TST is flashing 3 VTest 24 V DC between terminals 4b and 3a ETS output terminals 1a 5a shows 10 LED TST is flashing 4 VTest 24 V DC between terminals 4a 3b 4b and 3a ETS output...

Страница 20: ...is a defect 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 manufacture...

Страница 21: ...at are in the safety loop HFT Hardware Fault Tolerance MTBF Mean Time Between Failures MTTR Mean Time To Restoration PCS Process Control System PFDavg Average Probability of dangerous Failure on Deman...

Страница 22: ...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 5086B...

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