ABB ACS800-U1 Application Guide

38 Technical data
 Multiples of frame size R8i
Above values for frame sizes R7/R7i/R8/R8i apply for the multiples of frame size R8i,
except for values of PFH, PFD
avg
and MTTF
D
. These values are listed below.
• The following temperature profile is used in safety value calculations:
• 670 on/off cycles per year with T = 71.66 °C
• 1340 on/off cycles per year with T = 61.66 °C
• 30 on/off cycles per year with T = 10.0 °C
• 32 °C board temperature at 2.0% of time
• 60 °C board temperature at 1.5% of time
• 85 °C board temperature at 2.3% of time.
• The STO is a type A safety component as defined in IEC 61508-2.
• Relevant failure modes:
• The STO trips spuriously (safe failure)
• The STO does not activate when requested
A fault exclusion on the failure mode “short circuit on printed circuit board” has been
made (EN 13849-2, table D.5). The analysis is based on an assumption that one
failure occurs at one time. No accumulated failures have been analyzed.
• Reaction times are described in section STO function activation and indication
response times on page 14.
Frame size
PFH
(1/h)
T
1
= 20 a
PFD
avg
T
1
= 2 a
PFD
avg
T
1
= 5 a
MTTF
D
(a)
2×R8i 1.74E-09 1.61E-05 3.90E-05 2497
3×R8i 2.62E-09 2.41E-05 5.84E-05 1664
4×R8i 3.49E-09 3.21E-05 7.79E-05 1248
5×R8i 4.36E-09 4.01E-05 9.74E-05 999
6×R8i 5.23E-09 4.82E-05 1.17E-04 832
7×R8i 6.10E-09 5.62E-05 1.36E-04 713
8×R8i 6.97E-09 6.42E-05 1.56E-04 624
9×R8i 7.85E-09 7.23E-05 1.75E-04 555
10×R8i 8.72E-09 8.03E-05 1.95E-04 499
11×R8i 9.59E-09 8.83E-05 2.14E-04 454
12×R8i 1.05E-08 9.63E-05 2.34E-04 416
3AXD10000342876 Rev B

ABB ACS800-U1 Specifications

General

Brand	ABB
Model	ACS800-U1
Category	Controller
Language	English