Description
3.5 Functions
SIRIUS 3RM1 motor starter
34
Manual, 06/2016, A5E0345285095020A/RS-AE/005
3.5.1.2
Reversing starter
Using the 3RM1 motor starter as a reversing starter
The 3RM12 and 3RM13 motor starters can be used as reversing starters.
The reversing starter starts the motor when the control voltage is applied at input IN1 in
direction of rotation 1 (no phase swapping), when controlling input IN2 in direction of
rotation 2 (phase change from L1 and L3).
Interlocking of the control inputs
After the motor is switched off, the motor starter accepts a new start after a pause time.
If you apply control inputs IN1 and IN2 simultaneously, control input IN1 has priority. The
motor starts up in this direction of rotation.
When the motor is running, activation of the second input has no effect.
The figure below shows an example of the effects of the signals at the control inputs on the
direction of rotation of the motor:
1
Controller 1 active
2
Motor ON
1-2
Switch-on delay
3
Control input 1 inactive
4
Motor OFF
3-4
Switch-off delay
5
With simultaneous activation of the control inputs, the motor is started in the clockwise
direction.
6
Additional activation of the second control input has no influence.
7-8
After motor OFF, the motor starter accepts a new start (motor ON) after a pause time.
Note
Please observe the information about the control supply voltage and the control inputs in the
chapter "Device versions (Page 29)".
