Eaton PowerXL DA1 Series Installation Manual page 82

2 Engineering
2.10 STO function
78
The STO function that is integrated into the DA1 variable frequency drive
fulfills the definition of "safe stop" according to IEC 61800-5-2 and
corresponds to a non-controlled hold in accordance with category 0
(emergency-stop) of the IEC 60204-1 norm. This means that the motor runs
down (coasts), if the STO function is activated. The method used for
stopping must be appropriate for the system being driven by the motor.
The STO function is approved for use as a fail-safe method even in cases in
which the STO signal is not present and a single fault has occurred in the
drive. The drive was accordingly tested in accordance with the following
safety standards:
SIL
( Safety Integrity
Level)
EN 61800-5-2 2
PL(Performance
Level)
EN ISO 13849-1 PL d
SIL CL
EN 62061 SIL CL 2
The values provided here can only be ensured if the DA1 variable frequency
drive is installed in an environment that stays within the permissible limits:
• Ambient temperature range: -10 to +50 °C, taking into account any limits
that depend on frame size and protection.
• Maximum altitude for rated operation: 1000 m above sea level,
with altitude derating of 1 % for every 100 m above 1000 m
(up to max. 4000 m for IEC / 2000 m for UL)
• Relative humidity: < 95 % (non-condensing).
The DA1 variable frequency drive must always be free of frost and
moisture.
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
PFH (Probability of dangerous
d
Failures per Hour)
1.23E-09 1/h (0.12 % SIL 2)
CCF (%)(Common Cause
Failure)
1
SFF (%) Lifetime
(Safe Failure Fraction) assumed
50 20 Yrs