Danfoss VLT ISD 510 Operating Manual page 154

VLT® Servo Drive System ISD 510/DSD 510
Operating Guide
Data
Lifetime
Data for EN/ISO 13849-1
Performance level (PL)
Category
Mean time to dangerous failure (MTTF
Diagnostic coverage (DC)
Data for EN/ISO 61508 and EN/IEC 62061
Safety integrity level (SIL)
Probability of failure per hour (PFH)
Safe failure fraction (SFF)
Subsystem classification
Functional test interval
-
The PSM 510, DAM 510, and ACM 510 do not contribute to the dangerous failure rate of the Danfoss system and can there-
fore be excluded from safety-related calculations.
8.11 Maintenance, Security, and User Accessibility
Maintenance: Test the STO safety function at least once per year as follows:
• Remove the STO input voltage.
• Verify that the motors stop running.
• Verify that no unexpected error codes appear.
Security: If security risks exist, take suitable measures to prevent them.
User accessibility: Restrict access to the ISD 510/DSD 510 servo drives and other system components if access to them could result in
safety risks.
154 | Danfoss A/S © 2020.08
)
D
N O T I C E
Functional Safety Concept
ISD 510/DSD 510 PSM 510
20 years
d –
3 –
>5000 years –
60% –
2 –
-9
<4 x 10 /h 0 /h
>95% 100%
Type A
1 year
AQ262449648484en-000101 / 175R1135
DAM 510
–
–
–
–
–
0 /h
100%