SIEMENS
3/80
Siemens IC 10 · 2017
Power Contactors for Switching Motors
Accessories and Spare Parts for SIRIUS 3RT Contactors and SIRIUS 3RH2 Contactor Relays
Accessories
3
The inquiry from the motor starter protector/circuit breaker does
not take place through additive wiring between the auxiliary
switch and the module but by means of a voltage inquiry at the
contactor input.
This requires special versions of the contactors with voltage
tap-off
(see pages 3/58, 3/62, 3/67 and 3/69)
.
Availability signal through voltage tap-off
The following benefits result from the use of
SIRIUS 3RA27 function modules:
•
Reduction of control current wiring. In the case of IO-Link
to no more than three cables for four feeders.
•
Elimination of testing costs and wiring errors
•
Reduction of configuration work
•
Parameter server functionality
•
Integration in TIA means unambiguous IO-Link diagnostics if
a fault occurs
•
Dispensing with IO modules saves space in the control
cabinet
•
All essential timing and interlocking functions for reversing
duty and star-delta (wye-delta) starting are integrated
•
No additive protection circuit required
For more information on IO-Link and AS-Interface,
see
"Industrial Communication", from page 2/1 onwards
.
SIRIUS 3RA2711 function modules for IO-Link for mounting on 3RT2 contactors
By grouping up to four starters, it is possible to connect up to
16 starters to one master of the ET 200SP or S7-1200. In this
case all the signals of the individual controls are made available
directly in the process image of the input through only three in-
dividual wires per starter group. If the same potential is present
at the ET 200SP or S7-1200 master and at the switching devices,
the wiring can be reduced further by connecting the supply
voltage of the contactor coils to the communication wires via
jumpers.
Group formation with IO-Link
In case of a malfunction, the corresponding error signals are
also sent directly to the PLC in acyclic mode. This is in addition
to transmission of the switching signals and status signals.
Possible error signals:
•
Switching element defective
•
No main voltage (motor starter protector tripped)
•
No control supply voltage
•
Limit position on the right / on the left
•
Manual mode
•
Process image fault
NSB0_02086
Motor starter protector
Contactor
Reversing
starter
Direct-on-
line starter
Direct-on-
line starter
Group formation for 4 starters max. per IO-Link port
Reversing
starter
IO-link master
Port 1
Port 2
1
2
3
4
...
NSB0_02087b
© Siemens AG 2016