Back to top

Hello.
While testing the AKD Dynamic brake, we found that the dynamic brake feature did not work on the Synqnet drive.
The menu said the Synqnet drive is supported, so why can't I do it?
Is there another way to use it?

Thank you

Device EN 13849-1 EN 61800-5-2 PFHD (1/h) TM (Years)
Input STO-Enable PL d, Cat.3 SIL 2 1.50E-07 20
Device EN 13849-1 EN 61800-5-2 PFH(1/h) T(Years)
Input STO-Enable PL d, Cat.3 SIL 2  1.50E-07 20

There is no certification for the S601-620 drives according to EN 13849-1 or EN 62061.

Function Operation Mode ISO  13849-1 IEC 61508-2 PFH [1/h] TM [Years] SFF [%]
STO single channel PL d, CAT 2 SIL 2 1.88E-07 20 89
STO dual channel PL d, CAT 3 SIL 2 5.64E-09 20 87
STO dual channel with periodical testing PL d, CAT 4 SIL 3 5.64E-09 20 87
Structure STO ISO 13849-1 IEC 62061 PFH [1/h] SFF [%] TM (Years)
AKD-C + 1 x AKD-N global PL d, CAT 3 SIL 2 2.9E-08 97.08 20
AKD-C + 8 x AKD-N global PL d, CAT 3 SIL 2 2.9E-08 99.44 20
1 x AKD-N-DS local PL d, CAT 3 SIL 2 2.9E-08 97.12 20

STO, no safety card

Device S701-724 Operation mode EN 13849-1 EN 62061 PFH(1/h) T(Years) 
STO1/2-Enable single channel PLd, Cat.3 SIL CL2 7.05E-08 20
STO1-Enable+STO2-Enable dual channel PLd, Cat.3 SIL CL2 7.05E-08 20
STO1-Enable+STO2-Enable+STO-Status dual channel with periodic test PLe, Cat.4 SIL CL3 1.04E-09 20

With safety card S1-2/S2-2 and motor feedback

Motor feedback with unknown MTTF value

MTTF = 10 must be used in this case (according to the graduated process for estimation of MTTF in EN 13849-1:2008 chapt. 4.5.2). The motor encoder is already included in the characteristic data, so no further calculations need to be performed for the "Safe Actuator" subsystem. The subsystem is built from S700, safety card and motor feedback.

Device (feedback with unknown MTTF) EN 13849-1 EN 62061 PFH(1/h) T(Years) 
S700 with Safety card S1/S1-2 and unknown motor feedback PL d, Cat.3 SIL CL 2 1.26E-07* 20
S700 with Safety card S2/S2-2 and unknown motor feedback PL d, Cat.3 SIL CL 2 1.35E-07* 20

 * = depends on the MTTF value of the used feedback. The higher MTTF the smaller is PFHD . This has an influence to the complete system, even if PL and SIL classes don't change.

Motor feedback with MTTF value larger than 57

Most of the feedback systems, especially resolvers, have MTTF values larger than 57. The motor encoder is already included in the characteristic data, so no further calculations need to be performed for the "Safe Actuator" subsystem. The subsystem is built from S700, safety card and motor feedback.

Device (feedback with MTTF > 57) EN 13849-1 EN 62061 PFH(1/h) T(Years)
S700 with Safety card S1/S1-2 and Kollmorgen motor feedback PL e, Cat.4 SIL CL 3 2.37E-08* 20
S700 with Safety card S2/S2-2 and Kollmorgen motor feedback PL d, Cat.3 SIL CL 2 1.35E-07* 20

 * = depends on the MTTFD value of the used feedback. The higher MTTFD the smaller is PFHD . This has an influence to the complete system, even if PL and SIL classes don't change.

With safety card S1-2 and two feedback systems

In this case the system depends on the used feedback systems, therefore the system must be calculated individually. The given subsystem below is built from S700 and safety card S1-2, the feedback systems used by Kollmorgen are given as parts (see "Characteristic Data Feedback").

Device EN 13849-1 EN 62061 PFH(1/h) T(years) 
S700 with Safety card S1-2 PL e, Cat.4 SIL CL 3 1.19E-08 20

This is valid for drives with HWR >= 02.10.

Device S748-772 Operation mode EN 13849-1 EN 62061 PFH(1/h) T(Years) 
STO1/2-Enable single channel PLd, Cat.3 SIL CL2 7.05E-08 20
STO1-Enable+STO2-Enable dual channel PLd, Cat.3 SIL CL2 7.05E-08 20
STO1-Enable+STO1-Status+
STO2-Enable+STO2-Status
dual channel with periodic test PLe, Cat.4 SIL CL3 1.38E-09 20

Multi-Fieldbus is the ability of Kollmorgen servo amplifiers to communicate with a lot of different fieldbus systems. These bus systems are accessible either with option cards, firmware variants or device variants.

Pages