Siemens SIRIUS 3RT Series System Manual page 658

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
7.5 Configuration
3RA2815-..W10
L1(+)
N(-)
L1(+)
N(-)
The 3RA2815 solid-state time-delay auxiliary switch has the following features:
● The voltage is supplied through the plug-in contacts directly via the contactor's coil
terminals, parallel to A1/A2.
● The timing function is activated by switching on the contactor on which the delayed
auxiliary switch is mounted.
● The 3RA2815 solid-state time-delay auxiliary switch works without auxiliary voltage.
● The minimum ON duration is 200 ms.
● A varistor is integrated in the solid-state time-delay auxiliary switch to attenuate contactor
coil switching overvoltages.
Note
The setting of the output contacts is not defined in as-supplied state (bistable relay).
Connect the control voltage and then disconnect it again to set the contacts to the normal
position.
658
S1
A1
15
Q
16 18
A2
S1
A1
27 35
Q
28 36
A2
≥200 ms
A1/A2
15/18
15/16
t
≥200 ms
A1/A2
27/28
35/36
t
System Manual, 01/2011, A8E56203870002-03
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