Sub module must work along with the main unit.
Sub modules share the same approach of the installation. The sub modules in installation images are for reference only.
Make sure the device in the package is in good condition and all the assembly parts are included.
Set the sub module address before start the installation steps.
Make sure the place for surface mounting is flat.
Make sure all the related equipment is power-off during the installation.
Tools that you need to prepare for installation:
Drill (ø6), cross screwdriver (PH1*150 mm), and gradienter.