AKD Installation | 5 Approvals
5.3 Safe Torque Off (STO) approval
An additional digital input (STO,
S
afe
T
orque
O
ff) releases the power output stage of the drive
as long as a 24 V signal is applied to this input. If the STO input goes open-circuit, then power
will no longer be supplied to the motor, and the drive will lose all torque and coast to a stop.
The STO safety implementation on the AKD is certified. The safety circuit implementation for
realizing the safety function "Safe Torque Off" in the drive is suited for SIL2 according to IEC
62061 and PLd, Cat.3 according to ISO 13849-1.
With AKD-x04807 drives SIL3/PLe is possible, if both STO-Enable inputs are used with the
corresponding STO-Status signals.
Safety certificates can be found on the Kollmorgen website.
The subsystems (AKD) are totally described for safety technics with the characteristic data :
Device
Operation
Mode
ISO
13849-1
IEC
62061
PFH
[1/h]
T
M
[Years]
SFF
[%]
AKD-x003...024
single
channel
PL d, CAT 3
SIL 2
1.50E-07
20
100
AKD-x048
single
channel
PL d, CAT 2
SIL 2
1.88E-07
20
89
dual
channel
PL d, CAT 3
SIL 2
5.64E-09
20
87
dual channel with
periodical testing
PL e, CAT 4
SIL 3
5.64E-09
20
87
5.4 Conformance with EAC
EAC is the abbreviation for Eurasian Conformity. The mark is used in the states of the Eur-
asian Customs Union (Russia, Belarus, Kazakhstan) similar to the European CE mark.
Kollmorgen declares, that the AKD has passed all required conformity procedures in a mem-
ber state of the Eurasian Customs Union, and that the AKD meets all technical requirements
requested in the member states of the Eurasian Customs Union:
Low voltage (TP TC 020/2011)
Electromagnetic Compatibility (TP TC 004/2011)
Contact: Intelisys LLC. , Bakuninskaya Str. d 14, Building 10, RU-105005 Moskau
28
Kollmorgen | kdn.kollmorgen.com | October 2017
