Siemens SIRIUS ACT 3SU1 - Page 40

Overview
4.5 Types of 3SU1 actuating elements and signaling elements
SIRIUS ACT 3SU1 pushbuttons and signaling devices
40 System Manual, 08/2018, A5E03457306020A/RS-AK/010
Mounting and stacking of the modules on a 4-slot holder
The figure below shows
an example
of the mounting and stacking of the modules on a 4-slot
holder.
It is not possible to mount an LED module on a 4-slot holder.
A
4-slot holder
B1 / B2
Contact module 1-pole
D
Contact module 2-pole