Siemens SIRIUS ACT 3SU1 System Manual page 462

Dimension drawings
15.2 Mounting dimensions
Overview of mounting depths
22.5 mm devices with modules
X1
X2
X3
a
462
3-slot holder
49.7 mm
71.7 mm
71.7 mm
4-slot holder
53.7 mm
75.7 mm
75.7 mm
1 ... 6 mm
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 08/2018, A5E03457306020A/RS-AK/010