How to use SAFE STOP(STO) on MX2 Drives
Written by Nick Lim
Updated at March 18th, 2025
MX2 inverters incorporates a SAFE STOP(STO) function at hardware level. Activating these will cause a category level 0 stop. However the method to use this feature changes slightly depending on the version.
The method of using the SAFE STOP(STO) function changes depending whether you have the V1 or the V2 model. Please select the relevant model below:
To use the SAFE STOP(STO) feature on a MX2-V1 drive enable the safety function selector switch below.
This will set S3 and S4 to be your safety inputs and have the drive parameters automatically updated.
There is also a selector switch to enable the EDM which will automatically assign P1 as your EDM output.
Example Wiring:
On the MX2 V2 Drives there are dedicated SAFE STOP(STO) inputs, see them highlighted below.
You can enable the EDM by setting the selector switch shown below which will set P1 to be your EDM output.
Example Wiring:
