User Manual

SIRIUS 3RU2/3RB3 overload relays
5.4 Functions
SIRIUS Innovations
500 System Manual, 01/2011, A8E56203870002-03
5.4.3 Auxiliary contacts
Function
The auxiliary contacts control the contactor and signal overloads.
Auxiliary contact Response to overload
NC contact (NC 95-96) Disconnects the contactor, thereby protecting:
 The contactor
 The cables
 The load
NO contact (NO 97-98) Sends a signal, e.g. to the:
 Control system
 Lamp
 Other actuators
Note
Contact rating
The contact rating of the auxiliary switches to be taken into account is specified in the
Technical data (Page 536).
Reference
More information ... Can be found in...
About the response of auxiliary contacts The chapter titled Response of the auxiliary
contacts (Page 522)