Festo CAMC-G-S1, Translation Of The Original Instructions

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B Glossary
Festo – GDCP-CAMC-G-S1-EN – 1412b – English 49
B Glossary
Term/abbreviation Description
Cat. Category in accordance with EN ISO 13849-1, steps 1-4.
CCF Common Cause Failure in accordance with EN ISO 13849-1.
DC avg Average Diagnostic Coverage in accordance with IEC 61508 and
EN 61800-5-2.
EMERGENCY
SWITCHING OFF
In accordance with EN 60204-1: Electrical safety in case of emergency by
switching off the electrical energy to all or part of the installation.
EMERGENCY SWITCHING OFF is to be used where a risk of electric shock or
other electrical risk exists.
Emergency stop In accordance with EN 60204-1: Functional safety in an emergency by
bringing a machine or movable parts to a standstill.
Emergency stop is used to stop a process or a motion if this creates a danger.
FCT Festo Configuration Tool, software for configuration and commissioning
HFT Hardware Fault Tolerance in accordance with IEC 61508.
MTTF
d
Mean Time To dangerous Failure: Time in years until the first dangerous
failure occurs with 100 % probability, in accordance with EN ISO 13849-1.
OSSD Output Signal Switching Device: Output signals with 24 V cycle rates for error
detection.
PFD Probability of Failure on Demand in accordance with IEC 61508.
PFH Probability of Dangerous Failures per Hour in accordance with IEC 61508.
PL Performance Level in accordance with EN ISO 13849-1: Stages a … e.
Safety switching
device
Device for executing safety functions or restoring the machine to a safe
status after the power supply to dangerous machine functions has been
switched off. The desired safety function is achieved only in combination with
other measures, although switch-off can occur on a motor controller, for
example.
SFF Safe Failure Fraction [%] in accordance with IEC 61508.
SIL Safety Integrity Level, discrete stages for defining the requirements for the
safety integrity of safety functions in accordance with IEC 61508, EN 62061
and EN ISO 13849.
SIL CL SIL claim limit, for a subsystem, in accordance with EN 62061.
STO Safe Torque Off in accordance with EN 61800-5-2.
T Duration of use in accordance with EN ISO 13849-1.
Tab. B.1 Terms and abbreviations