Siemens SIDOOR ATD401W System Manual page 193

Then, if necessary, mount the geared motor on the mounting bracket.
a
b
2. Mount the deflector unit, if necessary with a mounting bracket.
Ensure that the drive pinion and deflector pulley are aligned when doing so. They have to
be exactly aligned to ensure a long drive service life.
ATD4xxW Door Controller for Industrial Applications
System Manual, 01/2017, A5E38080677-AB
SIDOOR M3 / MDG180
SIDOOR M4 / MDG400 / MDG400 NMS / M5 / MDG700 NMS
Geared motors
5.2 Installation
193