Appendix; Abbreviations - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151

10 Appendix

10.1 Abbreviations

Abbreviation Description
Cat. Category (EN ISO 13849-1).
CCF Common cause failure (IEC 61508, IEC 62061, EN 61511-1, EN ISO 13849-1).
CCW Counterclockwise.
CW Clockwise.
DC Diagnostic coverage (EN ISO 13849-1, IEC 62061 (IEC61508-2)).
DIx DI1: Digital input 1.
DI2: Digital input 2.
EMC Electromagnetic compatibility.
MFFT/MTTFd Mean time to failure/mean time to dangerous failure (EN ISO 13849-1).
OSSD Output signal switching device (EN 61496-1).
PDS(SR) Power drive system (safety related).
PELV Protective extra low voltage, low voltage with isolation. For more information: IEC 60364-4-41 or IEC 60204-1.
PFD Probability of failure on demand (IEC 61508, IEC 62061).
PFH Probability of failure per hour (IEC 61508, IEC 62061).
PLC Programmable logic controller.
PUST Power up self-test. Internal self-test on the safety option.
SF Safe function.
SIL Safety integrity level (IEC 61508, IEC 61800-5-2, IEC 62061).
SLS Safely limited speed.
SO Safety option.
SRECS Safety-related electrical control system (IEC 62061).
SRP/CS Safety-related part of control systems (EN ISO 13849-1).
SS1 Safe stop 1.
STO Safe Torque Off.
TM Mission time (EN ISO 13849-1).
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Appendix
AQ279747441421en-000101 / 130R0292