Siemens SIRIUS 3RT Manual page 458

Accessories
9.34 Solid-state time-delay auxiliary switch blocks (size S6 to S12)
ON-delay and OFF-delay functions
The solid-state time-delay auxiliary switch block in the "ON-delay" and "OFF-delay" versions
has the following features:
● Allows time-delayed functions up to 100 s.
● 3 setting ranges
● Contains a relay with 1 NO contact + 1 NC contact; depending on the version, the relay is
switched either after an ON-delay or after an OFF-delay.
Star-delta (wye-delta) function
The solid-state time-delay auxiliary switch with "star-delta (wye-delta)" function has the
following features:
● It is equipped with one delayed and one instantaneous NO contact, with a dead time of
50 ms between the two.
● The delay time of the NO contact can be adjusted between 1.5 s and 30 s.
● The contactor on which the solid-state time-delay auxiliary switch block is mounted
operates without a delay.
Connection
The terminals A1 and A2 for the rated control supply voltage of the solid-state time-delay
auxiliary switch block are connected to the corresponding contactor by connecting cables.
Terminal designation
Another auxiliary switch block can be snapped onto the contactor beside the solid-state time-
delay auxiliary switch block.
The terminals of the delayed contacts are designated -5 / -6 (NC contactors) and -7 / -8 (NO
contacts).
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SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006