Siemens SIRIUS 3RA6 System Manual page 171

Expanding the SIRIUS infeed system for 3RA6 by means of additional extension modules
Screw-type infeeds and extension blocks can be expanded by adding additional 3-slot and 2-
slot extension modules.
The screw-type infeeds can only be expanded by adding modules to the right.
With spring-loaded connection technology, the extension module can be added to the right
or left, depending on which side the spring-loaded infeed has been installed.
NOTICE
Damage to the extension connector!
The maximum rated current for extension connectors is 63 A. If the rated current is
exceeded, the extension connector will be damaged beyond repair.
Make sure that the extension connector is never subjected to a current higher than 63 A.
Hazardous voltage!
Will cause death or serious injury.
If extension connectors or end covers are missing, direct contact with live parts is possible.
The electrical interface for the expansion module must be fitted with an extension connector
or an end cover at all times when the power supply is energized.
When installing/removing an extension connector or an end cover the system power supply
must be switched off.
SIRIUS 3RA6 compact starter
System Manual, 08/2018, NEB560060102000/RS-AB/007
DANGER
Accessories
7.7 Infeed system for 3RA6
171