AKD-C Installation | 7 Technical description and data
7.15.6 General information
Connector X16 offers access to all STO (Safe Torque Off) relevant signals of the decentral
drive system powered by this AKD-C .
The global STO function uses the following devices: AKD-C, AKD-N without option "DS" or
"DT", Kollmorgen hybrid connection cable.
There is one STO-Enable input and one STO-Status output for each DC Power string. STO-
Enable 1 does affect string 1 only. STO-Enable 2 does affect string 2 only.
The string STO input releases 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. If the STO input goes
open-circuit, then power will no longer be supplied to the connected motors, and the drives
will lose all torque and coast to a stop.
In case of using an AKD-N with option "DS" or "DT" (local STO input), the global STO signal
will have not influence to this specific drive. The local STO input on the AKD-N has no influ-
ence to the global STO as well. The local STO functionality is described in the AKD-N install-
ation manual.
The STO safety implementation on the AKD is certified. The safety circuit implementation
used for the safety function "Safe Torque Off" in the drive is suited for SIL 2 according to IEC
62061 and PLd / CAT3 according to ISO 13849-1.
Application examples can be found in the
Decentralized System Projecting Guide
.
40
Kollmorgen | kdn.kollmorgen.com | February 2018
