Safe Torque Off (Sto) - Kollmorgen MKD-C Series Product Safety Manual

MKD Product Safety Guide | 1 English

1.5 Safe Torque Off (STO)

Safety functionality is not approved nor certified. Do not use this functionality in applications
with functional safety request.
Refer to the MKD Installation Manual for full information on functional safety.
The safety properties given by Kollmorgen listed in the appendix (➜ # 77) can be reached if
the Kollmorgen components are used. The resulting Functional Safety classification (SIL
and/or PL level) must be calculated across the drive system.
Global STO
There is one STO input for every DC Power string. The string STO input release the power
output stage of all AKD-N (without option DS/DT) connected to the string as long as a 24 V
signal is applied to this input.
Local STO
The local STO input releases the power output stage of the MKD-N drive axis as long as a 24
V signal is applied to this input.
16 Kollmorgen | kdn.kollmorgen.com | January 2019
MKD-C connector X16:
global STO (String 2/3) inputs of the system powered by this MKD-C.
MKD-N connector X26:
local STO (axis 1 and axis 2 if built-in) input of the drive module.
AKD-N connectors X6:
local STO input of the AKD-N-DS/DT drive modules.