•
•
•
-
Data
ISD 510/DSD 510
PSM 510
DAM 510
Lifetime
20 years
Data for EN/ISO 13849-1
Performance level (PL)
d
–
–
Category
3
–
–
Mean time to dangerous failure (MTTF
D
)
>5000 years
–
–
Diagnostic coverage (DC)
60%
–
–
Data for EN/ISO 61508 and EN/IEC 62061
Safety integrity level (SIL)
2
–
–
Probability of failure per hour (PFH)
<4 x 10
-9
/h
0 /h
0 /h
Safe failure fraction (SFF)
>95%
100%
100%
Subsystem classification
Type A
Functional test interval
1 year
N O T I C E
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.
AQ262449648484en-000101 / 175R1135
154 | Danfoss A/S © 2020.08
Functional Safety Concept
VLT® Servo Drive System ISD 510/DSD 510
Operating Guide
