PACMotion™ PSD
Installation and User Manual
Section 4
GFK-3168A
September 2020
Technical Description and Data
36
4.16.2
Safety characteristic data
The subsystems (PSD) are described with the following characteristic data:
4.16.2.1
IC830DP003 up to IC830DP024
Function Operation mode ISO 13849-1 IEC 62061
PFH
[1/h]
T
M
[Years]
SFF [%]
STO
single channel
PL d, CAT 3
SIL 2
1.50E-07 20
100
Note: A very unlikely but possible event can happen, if within a very short time 2 not adjacent
IGBTs will have a short circuit. In such case a movement of a maximum angle of 120° (electrical) can
happen. This effect can only happen if the drive is in the function STO. If the total failure rate of the
IGBT is 120 FIT normally for such short circuit 60 FIT will be valid (50:50 model). By such event 2
specific IGBTs have to fail at same time. The calculation shows a probability of 1.5 * 10
-15
per hour
(without common cause failure). Even if the STO function will be issued for a whole year, this event
will only happen every 100 Billion years.
4.16.3
Safety instructions
WARNING
No Brake Power!
Serious injury could result when a suspended load is not properly blocked. The drive cannot hold a
vertical load when STO is active.
Add a safe mechanical blocking (for instance, a motor-holding brake). Elevator applications are not
allowed.
DANGER
Automatic Restart!
Risk of death or serious injury for humans working in the machine. The drive might restart
automatically after power on, voltage dip or interruption of the supply voltage, depending on the
parameter setting. If parameter DRV.ENDEFAULT is set to 1,
then place a warning sign ("WARNING: Possible Automatic Restart" or similar) to the machine.
Ensure, that power on is not possible, while humans are in a dangerous zone of the machine.
