Specifications Of Sto - Delta ASDA-B3 Series User Manual

Wiring

3.9.3 Specifications of STO

The ASDA-A3 series servo drive conforms to the following safety specifications:
3
(Type A subsystem)
PFD
Category
MTTF
3-98
Item
SFF Safe failure fraction
HFT
Hardware fault tolerance
SIL Safety integrity level
Probability of dangerous failure per
PFH
-1
hour [h ]
Average probability of failure on
avg
demand
Category
PL Performance level
Mean time to dangerous failure
d
DC Diagnostic coverage
Definition Standard Performance
Channel 1: 80.08%
IEC 61508
Channel 2: 68.91%
IEC 61508 1
IEC 61508 SIL2
IEC 62061 SILCL2
IEC 61508 9.56×10 -10
-6
IEC 61508 4.18×10
ISO 13849-1 Category 3
ISO 13849-1 d
ISO 13849-1 High
ISO 13849-1 Low
ASDA-B3