ABB ACS880-07 User Manual - Abbreviations
Introduction to the manual 9
Abbreviations
Abbreviations used in this manual are listed below.
Exclusion of liability
ABB is not responsible for the implementation, verification and validation of the overall
safety system. It is the responsibility of the system integrator (or other party) who is
responsible for the overall system and system safety.
Abbreviation
Description
Reference
Cat.
Category. Classification of the safety-related parts of a control system
in respect of their resistance to faults and their subsequent behavior
in the fault condition, and which is achieved by the structural
arrangement of the parts, fault detection and/or by their reliability.
The categories are: B, 1, 2, 3 and 4.
EN ISO 13849-1
CCF
Common cause failure (%)
EN ISO 13849-1
D8T
Frame size designation of the diode supply module
DC
Diagnostic coverage
EN ISO 13849-1
FIT
Failure in time: 1E-9 hours
IEC 61508,
EN/IEC 62061,
EN/IEC 61800-5-2
Frame (size)
Relates to the construction type of the drive in question. For example,
several drive types with different power ratings can have the same
basic construction, and a frame size is used in reference to all those
drive types.
With the ACS880-07/17/37 (smaller), the frame size marking of the
drive indicates the physical size of the drive, eg, R6.
With the ACS880-07 (larger), the frame size marking of the drive
indicates the quantity and frame size of the diode supply modules
plus the quantity and frame size of the inverter modules, eg,
“2×D8T +3×R8i”.
With the ACS880-17 and ACS880-37 (larger), the frame size marking
of the drive indicates the quantity and frame size of the IGBT supply
modules plus the quantity and frame size of the inverter modules, eg,
“2×R8i +3×R8i”.
HFT
Hardware fault tolerance
IEC 61508,
EN/IEC 62061
IGBT
Insulated gate bipolar transistor
PFD
avg
Average probability of dangerous failure on demand
IEC 61508
PFH
Average frequency of dangerous failures per hour
IEC 61508
PL
Performance level (levels are: a, b, c, d and e). Corresponds to SIL.
EN ISO 13849-1
POUS
Prevention of unexpected start-up
EN 1037
R6...R11, R8i
Frame size designation of the drive, inverter or IGBT supply module
SC
Systematic capability
IEC 61508:2010
SIL
Safety integrity level
IEC 61508,
IEC 61511,
EN/IEC 62061,
EN/IEC 61800-5-2
SILCL
Maximum SIL that can be claimed for a safety function or subsystem EN/IEC 62061
STO
Safe torque off
EN/IEC 61800-5-2
T1
Proof test interval or lifetime (the smaller one)
IEC 61508,
EN/IEC 62061