SIRIUS 3RT2 contactors/contactor assemblies 
  2.3 Product combinations 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
115 
2.3  Product combinations 
The SIRIUS contactors are part of the SIRIUS modular system and offer all the advantages 
which SIRIUS users have come to expect in terms of the ability to combine any of the 
system's products together with any others. These benefits are thanks to the uniform 
mechanical and electrical properties used throughout the modular system and are also due 
to the interplay with the higher control level. 
From a mechanical point of view, the 3RT2 contactors can be mounted directly onto the 
following SIRIUS devices: 
●  3RV2 motor starter protectors (with 3RA2921-.. link module) 
●  3RU2 thermal overload relays and 3RB30/3RB31 solid-state overload relays 
●  3RR2 current monitoring relays 
●  3RA28 function modules and 3RA27 function modules with a communication connection 
Reference 
 
More information ...  Can be found in the chapter titled... 
About the possible combinations of standard 
products from the SIRIUS modular system 
System overview, 
Device combinations (Page 70)