Pepperl+Fuchs F-LB-I Series Manual Download Page 36

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Fuchs Quality

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Fuchs

Subject to modifications

Printed in Germany / DOCT-2079A

Summary of Contents for F-LB-I Series

Page 1: ...ISO9001 3 Functional Safety Surge Protection Barriers K LB F LB I P LB 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: ...faces 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 Valu...

Page 4: ...Functional Safety K LB F LB I P LB Contents 4 2021 09...

Page 5: ...ting 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 app...

Page 6: ...nd 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 abso...

Page 7: ...re 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 This sy...

Page 8: ...as intrinsic safety isolated barriers signal conditioners and most field devices K LB G This surge protection barrier provides a low line to line clamping voltage and line to ground clamping voltage...

Page 9: ...n the product 2 4 Standards and Directives for Functional Safety Device specific standards and directives Note For corresponding connections see datasheet Pepperl Fuchs Group Lilienthalstra e 200 6830...

Page 10: ...nd the T1 value proof test interval that has a direct impact on the PFDavg value the SFF value Safe Failure Fraction the HFT architecture Hardware Fault Tolerance 3 1 2 High Demand or Continuous Mode...

Page 11: ...perience A similar factor must be used if frequent temperature fluctuations are expected Failure rate based on the Siemens standard SN 29500 The control loop has a hardware fault tolerance of 0 and it...

Page 12: ...and settings of the connected device e g isolator DCS input output field device Safety Function The safety function of the device is to behave like a piece of copper wire passing through the process s...

Page 13: ...type 1 AI AO DI DO Safe state 1 Iin 3 6 mA Signal line interrupted Iout 3 6 mA Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Safety loo...

Page 14: ...0 mA Uout 0 V Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Safety loop fault detection 3 3 This fault detection has to be provided by the safety loop architecture e g NAMUR sign...

Page 15: ...terrupted Iout 0 mA Uout 0 V Signal line interrupted Safety loop fault detection 3 3 This fault detection has to be provided by the safety loop architecture e g NAMUR signal lead breakage and short ci...

Page 16: ...on 3 3 This fault detection has to be provided by the safety loop architecture e g NAMUR signal lead breakage and short circuit detection current loop 20 mA 3 6 mA and 21 mA can be detected 3 6 mA and...

Page 17: ...Uout 0 V Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Safety loop fault detection 3 3 This fault detection has to be provided by the safety loop architecture e g NAMUR signal lea...

Page 18: ...in 3 6 mA Signal line interrupted Iout 3 6 mA Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Iout 0 mA Uout 0 V Signal line interrupted Safety loop fault detection 3 3 This fault d...

Page 19: ...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 I...

Page 20: ...nstructions 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 appl...

Page 21: ...to IEC EN 61508 2 a recurring proof test shall be undertaken to reveal potential dangerous failures that are not detected otherwise Check the function of the subsystem at periodic intervals depending...

Page 22: ...successful 4 After the test reset the device to the original settings DIN Mounting Rail Modules The following figures show the proof test set up for K LB 2 30 and K LB 2 30G Prepare the proof test se...

Page 23: ...Leakage current Comment K LB 1 6 K LB 1 6G 1 6 V between Pins 7 8 50 A Test passed if leakage current is below 200 A K LB 2 6 1 2 6 V between Pins 7 8 6 V between Pins 5 6 50 A Test passed if leakage...

Page 24: ...t set up of the other devices of this device family accordingly Figure 5 4 Proof test set up for P LB example surge protection barrier P LB 1 C 123 rd bk Zone 1 2 Div 1 2 GND gn ye U I Multimeter Devi...

Page 25: ...ent is below 200 A P LB 2 D 123456 1 2 3 4 5 6 30 V between Pins 1 2 30 V between Pins 2 3 30 V between Pins 1 3 30 V between Pins 4 5 30 V between Pins 5 6 30 V between Pins 4 6 50 A Test passed if l...

Page 26: ...n Pins 2 2 Resistance between Pins 3 3 Test passed if resistance is below 2 P LB 2 D 123456 1 2 3 4 5 6 Resistance between Pins 1 1 Resistance between Pins 2 2 Resistance between Pins 3 3 Resistance b...

Page 27: ...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 manufacturer abo...

Page 28: ...arrier can be integrated into this safety loop by allocating it to a field device It should be possible to get a principled overview as shown below Figure 7 1 Example of a complete safety loop with al...

Page 29: ...requirements are 1 Signal type of the safety loop digital 2 Signal direction of the safety loop as seen from the perspective of the safety DCS input 3 Safe state of the field device allocated to the s...

Page 30: ...lator du Surge protection barrier 3 du 47 FIT 0 FIT 47 FIT These characteristics allow calculating the SFF and PFDavg for the combination of both devices SFF 1 du total 4 SFF 1 47 FIT 270 FIT 82 PFDav...

Page 31: ...rd KFD2 SL2 Ex1 LK device has the following characteristics For the surge protection barrier P LB 1 A the following characteristics are given The combination of both devices is done by simply adding t...

Page 32: ...mbination of both devices is done by simply adding the characteristics again as before The SFF and PFDavg values can be calculated by using the equations given above This means that if compared with t...

Page 33: ...of the field device allocated to the surge protection barrier output signal 4 mA or respectively 20 mA Since the availability of SIL 3 field devices is very limited it is most likely that the end user...

Page 34: ...F and PFDavg values are still sufficient Total failure rate 536 FIT 7 FIT 543 FIT rounded MTBF 210 years Safe failure rate 143 FIT Dangerous undetected failure rate 57 FIT Dangerous detected failure r...

Page 35: ...unction not part Probability of failure of components that are not in the safety loop total safety function Probability of failure of components that are in the safety loop HFT Hardware Fault Toleranc...

Page 36: ...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 2079A...

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