3.3.7 Sirius safety relay
The SIRIUS 3TK2825 safety relay has two enable circuits (safe circuits) in the form of normally
open contact circuits.
Figure 3-4 SIRIUS safety relay
The operating state and functioning are indicated by three LEDs. When the EMERGENCY
STOP buttons or limit switches are released and the ON button is pressed, the internal circuit
of the safety relay and the external contactors are monitored to ensure that they are functioning
correctly.
See also
LEDs of the Sirius safety relay (Page 81)
3.3.8 Auxiliary power supply
3.3.8.1 Auxiliary power supply 1AC 230V 50Hz
The customer must provide an auxiliary power supply of 1AC 230 V for the following
components:
● Cabinet lighting
● Service socket outlets
● Anti-condensation heating
● Open-loop and closed-loop control
Refer to the drive technical data for the auxiliary power supply current rating.
Description
3.3 Components
SINAMICS SM120 6SL38715
Operating Instructions 07/2015 33
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