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Terms and abbreviations
Description
Reference
Term or abbre-
viation
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
Cat.
Common cause failure (%)
EN ISO 13849-1
CCF
Diagnostic coverage
EN ISO 13849-1
DC
Hardware fault tolerance
IEC 61508
HFT
Mean time to dangerous failure: (Total number of life units) / (Number
of dangerous, undetected failures) during a particular measurement
interval under stated conditions
EN ISO 13849-1
MTTF
D
Average probability of dangerous failure on demand, that is, mean
unavailability of a safety-related system to perform the specified safety
function when a demand occurs
IEC 61508
PFD
avg
Average frequency of dangerous failures per hour, that is, average
frequency of a dangerous failure of a safety related system to perform
the specified safety function over a given period of time
IEC 61508
PFH
Performance level. Levels a…e correspond to SIL
EN ISO 13849-1
PL
Periodic test performed to detect failures in a safety-related system
so that, if necessary, a repair can restore the system to an "as new"
condition or as close as practical to this condition
IEC 61508, IEC 62061
Proof test
Systematic capability
IEC 61508
SC
Safe failure fraction (%)
IEC 61508
SFF
Safety integrity level (1…3)
IEC 61508
SIL
Maximum SIL (level 1…3) that can be claimed for a safety function
or subsystem
IEC/EN 62061
SILCL
Safe torque off
IEC/EN 61800-5-2
STO
Proof test interval.
T
1
is a parameter used to define the probabilistic
failure rate (PFH or PFD) for the safety function or subsystem. Per-
forming a proof test at a maximum interval of
T
1
is required to keep
the SIL capability valid. The same interval must be followed to keep
the PL capability (EN ISO 13849) valid.
IEC 61508-6
T
1
See also section Maintenance.
Mission time: the period of time covering the intended use of the safety
function/device. After the mission time elapses, the safety device must
be replaced. Note that any
T
M
values given cannot be regarded as a
guarantee or warranty.
EN ISO 13849-1
T
M
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98 The Safe torque off function
Summary of Contents for ACS880-107LC
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 107LC inverter units Hardware manual ...
Page 2: ......
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Page 38: ...4 a 8 b 16 18 PE PE 10 38 Electrical installation ...
Page 39: ...13 12 21 Electrical installation 39 11 ...
Page 44: ...With FDPI 02 modules OPEN TERMINATED 1 1 2 2 OPEN TERMINATED 3 44 Electrical installation ...
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Page 115: ...Above Sides Front in mm in mm in mm 9 85 250 0 0 59 1500 Technical data 115 ...
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Page 130: ...Inverter module cubicle with two R8i modules bottom cable exit 130 Dimensions ...
Page 131: ...Inverter module cubicle with three R8i modules bottom cable exit Dimensions 131 ...
Page 133: ...Cubicle width 300 mm top cable exit Dimensions 133 ...
Page 134: ...Cubicle width 400 mm bottom cable exit 134 Dimensions ...
Page 135: ...Cubicle width 400 mm top cable exit Dimensions 135 ...
Page 136: ...Cubicle width 600 mm bottom cable exit 136 Dimensions ...
Page 137: ...Cubicle width 600 mm top cable exit Dimensions 137 ...
Page 138: ...138 ...