Siemens SIRIUS 3RU Manual page 126

Accessories
10.2 Terminal support for stand-alone assembly
Mounting the terminal support (spring-loaded connection system) size S00 / S0
①
Mounting the terminal support (screw-type connection system) size S2 / S3
①
②
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Insert the contacts (a) into the central opening of the main conductor terminals on the terminal
support, with the contacts flush to the right.
Make sure that the guide tabs are inserted into the designated slots on the terminal support.
Guide the overload relay into the terminal support from below with a swivel movement.
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003