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Functional Safety NCN3-F31K2(M)-N*-B*3-S With regard to the supply of products, the current issue of the following document is applicable: The General Terms of Delivery for Products and Services of the Electrical Industry, published by the Central Association of the Electrical Industry (Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the supplementary clause: "Expanded reservation of proprietorship"...
Additionally, the following parts may belong to the documentation, if applicable: • EU-type examination certificate • EU declaration of conformity • Attestation of conformity • Certificates • Control drawings • FMEDA report • Assessment report • Additional documents For more information about Pepperl+Fuchs products with functional safety, see www.pepperl-fuchs.com/sil.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Introduction Safety Information Target Group, Personnel Responsibility for planning, assembly, commissioning, operation, maintenance, and dismounting lies with the plant operator. Only appropriately trained and qualified personnel may carry out mounting, installation, commissioning, operation, maintenance, and dismounting of the product. The personnel must have read and understood the instruction manual and the further documentation.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Introduction Symbols Used This document contains symbols for the identification of warning messages and of informative messages. Warning Messages You will find warning messages, whenever dangers may arise from your actions. It is mandatory that you observe these warning messages for your personal safety and in order to avoid property damage.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Product Description Product Description Function General The device is an inductive dual sensor. Dual sensors are used, for example, to detect the final positions of valve positions in valve actuators. Inductive dual sensors consist of 2 sensor circuits arranged one above the other. Each sensor has its own coil.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Planning Planning System Structure 3.1.1 Low Demand Mode of Operation If there are two control loops, one for the standard operation and another one for the functional safety, then usually the demand rate for the safety loop is assumed to be less than once per year.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Planning Assumptions The following assumptions have been made during the FMEDA: • Failure rate based on the Siemens standard SN 29500. • Failure rates are constant, wear is not considered. • External power supply failure rates are not included. •...
Functional Safety NCN3-F31K2(M)-N*-B*3-S Planning Safety Function and Safe State Safe State The safe state of the device is the high impedance state (low current). Applications with control units or safety functions where the safe state is the low impedance state (high current) were not evaluated. Safety Function Figure 3.1 Distance values for the design of the safety function (abstract figure)
Functional Safety NCN3-F31K2(M)-N*-B*3-S Planning Characteristic Safety Values Parameter Characteristic values Assessment type and Full assessment documentation Device type Mode of operation Low Demand Mode or High Demand Mode Safety function High impedance state, depending on the position of the measuring plate in combination with a control unit according to EN 60947-5-6 (NAMUR) 107 FIT ...
Functional Safety NCN3-F31K2(M)-N*-B*3-S Planning 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.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Mounting and Installation Mounting and Installation Mounting and Installing the Device 1. Observe the safety 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 application. 5.
Functional Safety NCN3-F31K2(M)-N*-B*3-S Operation Operation Danger! Danger to life from missing safety function If the safety loop is put out of service, the safety function is no longer guaranteed. • Do not deactivate the device. • Do not bypass the safety function. •...
Functional Safety NCN3-F31K2(M)-N*-B*3-S Maintenance and Repair Maintenance and Repair Danger! Danger to life from missing safety function Changes to the device or a defect of the device can lead to device malfunction. The function of the device and the safety function is no longer guaranteed. Do not repair, modify, or manipulate the device.
Functional Safety NCN3-F31K2(M)-N*-B*3-S List of Abbreviations List of Abbreviations Diagnostic Coverage of dangerous faults Failure In Time in 10 FMEDA Failure Mode, Effects, and Diagnostics Analysis Probability of safe failure Probability of dangerous detected failure Probability of dangerous undetected failure ...
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Twinsburg, Ohio 44087 · USA Tel. +1 330 4253555 E-mail: sales@us.pepperl-fuchs.com Asia Pacific Headquarters Pepperl+Fuchs Pte Ltd. Company Registration No. 199003130E Singapore 139942 Tel. +65 67799091 E-mail: sales@sg.pepperl-fuchs.com www.pepperl-fuchs.com Subject to modifications DOCT-6036B Copyright PEPPERL+FUCHS • Printed in Germany 11/2019...