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Benutzerhandbuch / User Manual - TR Electronic

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Appendix<br />

15 Appendix<br />

15.1 Abbreviations and terms used<br />

CDH<br />

CDV<br />

CDx<br />

CRC<br />

EC<br />

EMC<br />

ESD<br />

IEC<br />

VDE<br />

Engineering<br />

tool<br />

F<br />

F-Device<br />

F-Host<br />

Fault<br />

exclusion<br />

FMEA<br />

Passivation<br />

DC avg<br />

PFD av<br />

PFH<br />

MTTF d<br />

SIL<br />

Absolute encoder with redundant dual scanning,<br />

hollow shaft design<br />

Absolute encoder with redundant dual scanning,<br />

solid shaft design<br />

Absolute encoder with redundant dual scanning,<br />

all designs<br />

Cylic Redundancy Check<br />

European Community<br />

Electro Magnetic Compatibility<br />

Electro Static Discharge<br />

International Electrotechnical Commission<br />

Verein Deutscher Elektrotechniker (Association of German<br />

Electrotechnicians)<br />

Projection and commissioning tool<br />

Generally stands for the term safety or fail-safe<br />

Safety device for safety applications<br />

Safety control for safety applications<br />

Compromise between the technical safety requirements and the<br />

theoretical possibility of an error occurring<br />

Failure Mode and Effects Analysis, reliability engineering methods, for<br />

finding potential weak points<br />

In the case of an F-Periphery with outputs, the F-System transmits<br />

substitute values (e.g. 0) to the fail-safe outputs during a passivation<br />

instead of the output values provided in the process image by the<br />

safety program.<br />

Diagnostic Coverage<br />

Average diagnostic coverage<br />

Average Probability of Failure on Demand<br />

Average probability of failure of a safety function with low demand<br />

Probability of Failure per Hour<br />

Operating mode with high requirement rate or continuous demand.<br />

Probability of dangerous failure per hour.<br />

Mean Time To Failure (dangerous)<br />

Mean time until dangerous failure<br />

Safety Integrity Level: Four discrete levels (SIL1 to SIL4). The higher<br />

the SIL of a safety-related system, the lower the probability that the<br />

system cannot execute the required safety functions.<br />

© <strong>TR</strong>-<strong>Electronic</strong> GmbH 2010, All Rights Reserved Printed in the Federal Republic of Germany<br />

Page 202 of 207 <strong>TR</strong> - ECE - BA - DGB - 0079 - 03 05/25/2011

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