Siemens SIRIUS Manual page 78

Mounting
7.3 Assembly and disassembly with different mounting systems
Mounting the direct-on-line starter (with soft starter) on the DIN rail adapter: Size S2
The figure below illustrates how the size S2 direct-on-line starter (with soft starter) with
screw-type connection system is mounted on a DIN rail adapter. The devices are snapped
onto the DIN rail adapter and screwed onto the adapter.
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SIRIUS - SIRIUS 3RA load feeders
Manual, 09/2016, A5E03656507520A/RS-AB/003