SIEMENS
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Siemens IK PI · 2015
AS-Interface
Slaves
Motor starters for use in the control cabinet
SIRIUS 3RA6 compact starters
> General data
4
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Overview
(continued)
More components of the 3RA6
Apart from the control supply voltage, "Overload" (1 CO) and
"Short circuit / Function fault" (1 NO) signaling contacts are al-
ready integrated into the 3RA61/3RA62 – and lockable via two
6-pole removable control circuit terminals. The 3RA61 has two
auxiliary contacts (1 NO + 1 NC) for displaying the position of the
main contacts. Unlike the 3RA61 direct-on-line starter, the
3RA62 reversing starter has one auxiliary contact (1 S) per direc-
tion of rotation per main contact.
Available for the 3RA61 and 3RA64 direct-on-line starters is a
slot for an optional auxiliary switch block (optionally 2 NO, 2 NC
or 1 NO + 1 NC) and for the 3RA62 and 3RA65 reversing starters
there are
two slots
(for auxiliary switch blocks see "Accessories"
on page 4/88).
In contrast to the direct-on-line starter, the 3RA62 reversing
starter has one auxiliary contact (1 NC) per direction of rotation
per main contact.
Positively-driven operation of the auxiliary contacts
There is positively-driven operation between individual auxiliary
circuits for the compact starter in the version as a direct-on-line
starter for parallel wiring (3RA61) between the auxiliary circuits
of the NC contacts (NC 21-22) and the NO contacts (NO 13-14)
in the basic unit.
In addition, the optional auxiliary switch block offers positively-
driven contacts in the 3RA69 13-1A version, each with one
normally closed contact and one normally open contact.
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Benefits
The SIRIUS 3RA6 compact starters offer a number of benefits:
•
Compact design saves space in the control cabinet
•
Little planning and assembly work and far less wiring thanks
to a single complete unit with one article number
•
Little variance through wide voltage range and 5 wide setting
ranges for the rated current mean low stock levels
•
High plant availability through integrated functionalities such
as prevention of main contact welding and disconnection at
end of service life
•
Greater productivity through automatic device reset in case of
overload and differentiated detection of overload and short
circuit
•
Easy checking of the wiring and testing of the motor direction
prior to start-up thanks to optional "control kits"
•
Speedy replacement of devices thanks to removable termi-
nals with spring-type and screw connections in the main and
control circuit
•
Efficient power distribution through the related SIRIUS infeed
system for 3RA6
•
Direct connection of the motor feeder cable to the SIRIUS
infeed system for 3RA6 thanks to integrated PE bar
•
Connecting and looping through incoming feeders up to a
cross-section of 70 mm²
•
When using the infeed system for 3RA6, possibility of directly
connecting the motor cable without intermediate terminals
•
Integration in Totally Integrated Automation thanks to the
optional connection to AS-Interface or IO-Link
The SIRIUS 3RA6 compact starters create the basis for high-
availability and future-proof machine concepts.
© Siemens AG 2014