Manual R06-2016 25 / 172
ROTARY INDEXING TABLE CONTROLLER
EF2...B
COMPONENT DESCRIPTIONS | 3.3 Motor contactor
3.3 Motor contactor
A power contactor can be used as a switching device for switching the motor to comply with safety requirements
according to SIL3.
In combination with a safety relay (see chapter 3.4), the requirements can be met for a safety integrity level SIL3 or
performance level PLe to their fullest extent, depending on the external circuit.
The Motor Contactor 3RT2017 is suitable for switching motors of up to 5.5 kW / 400 V (AC-3) and resistive loads of
up to 50 A (AC-1).
The following illustration shows an example of the features of the Motor Contactor 3RT2017-1BB42 for switching
motor loads.
Fig. 8: Motor Contactor 3RT2017-1BB42
3.3.1 Technical data
Refer to the device manual of the manufacturer for further information.
1 Coil terminal on the front side
2 Openings for voltage tap of the main circuit (communication-capable power contactor only)
3 Location hole for surge suppression
4 Location hole for 1-, 2-, and 4-pole auxiliary switch blocks
5 Labelling plate
6 1 integrated auxiliary contact ( 1 normally closed contact)
7 Main circuit terminals of the contactor to the load/motor connection (T1, T2, T3)
8 Main circuit terminals of the contactor to the power network (L1, L2, L3)
Permissible mounting position AC and DC operation
The contactors are designed for operation on a vertical mounting surface (1) and
for an upright mounting position (2).
Mechanical durability
Basic device
Basic device with snap-on auxiliary switch block
30 million
10 million
Switching cycles
Switching cycles
Rated isolation voltage U
i
(degree of contamination 3)
V690
Rated impulse withstand voltage U
imp kV 6
Protective separation between coil and main contacts acc. to DIN EN
60947-1, Annex N
V400
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