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11 Appendix
11.1 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.
F-DIO
Fail-safe digital input and output.
F-PLC
Fail-safe PLC
GSD
General station description. A GSD file contains characteristics of an I/O device.
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.
PSD
PROFIsafe driver.
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).
SO
Safety option.
SRECS
Safety-related electrical control system (IEC 62061).
SRP/CS
Safety-related part of control systems (EN ISO 13849-1).
Appendix
Installation Guide | VLT®Safety Option MCB 152
AN327351953089en-000101 / 130R0578
76 | Danfoss A/S © 2020.02
Summary of Contents for MCB 152
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