SIEMENS
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Siemens IC 10 · 2017
Contactors for Special Applications
SIRIUS 3RT13 contactors, 4-pole
Accessories
4
■
Overview
Auxiliary switches
See from page 4/40 onwards
The auxiliary switches can be designed as positively driven
contacts in 3RH contactor relays or also as mirror contacts in the
case of 3RT power contactors.
For more information on positively driven operation and mirror
contacts,
see Manuals
"More Information" on page 4/38
.
Snap-on auxiliary switch blocks
A maximum of eight auxiliary contacts can be attached, please
note the following:
•
Of these eight auxiliary contacts, there must be no more than
four NC contacts.
•
Ensure the symmetry of laterally mounted auxiliary switch
blocks
Surge suppressors without LED
See page 4/44
(also for spring-type terminals)
All 3RT13 contactors can be retrofitted with RC elements or
varistors for damping opening surges in the coil. Diodes or
diode assemblies (comprising noise suppression diodes and
Zener diodes for short break times) can be used.
With these contactors, varistors, RC elements and diode
assemblies can be plugged on directly at the coil terminals,
either on the top or underneath.
The plug-in direction of the diodes and diode assemblies is
determined by a coding device.
Note:
The OFF-delay of the NO contact and the ON-delay of the
NC contact are increased if the contactor coils are attenuated
against voltage peaks (noise suppression diode 6 to 10 times;
diode assembly 2 to 6 times, varistor +2 to 5 ms).
Coupling links for control by PLC
See pages 4/39 and 4/45
•
Operation with 24 V DC
•
Operating range 17 to 30 V
•
Low power consumption of 0.5 W
•
An LED indicates the switching state.
The 3RH2924-1GP11 coupling link has an integrated surge
suppressor (varistor) for the contactor coil being switched and is
mounted onto the size S0 contactor coil via a coil connection
module.
Sealable covers
See page 4/46
When contactors and contactor relays are used in safety-related
applications, it must be ensured that it is impossible to operate
the contactors manually.
For SIRIUS contactors there are sealable covers available for
this purpose as accessories; these prevent accidental manual
operation. These are transparent molded-plastic caps with a
bracket that enables the contactor to be sealed.
© Siemens AG 2016