AKD2G-S Installation, Safety 1 | 10 Functional Safety
10.6.2 Safety Properties Overview
These inputs are compatible with safety equipment that emits test pulses. However, test
pulses are not required. Incoming test pulses of up to 1 ms duration are ignored. The dwell
time of the test pulses should not exceed 10%.
The hardware fault tolerance is HFT = 1 according to IEC 61508. Two faults might lead to
loss of the safety functions.
The systematic capability according to IEC 61508 for the safety-related subsystems of the
drive are SC = 2. TM = 20 Years, SFF = 100%.
Function
ISO
13849-1
MTTF
d
Years
IEC
62061
PFH
[1/h]
CCF
[%]
Response time
STO dual channel
PL d, Cat. 3
i.p.
SIL 2
i.p.
>65
< 3.5 ms
128
Kollmorgen | kdn.kollmorgen.com | S101, December 2018