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A.3
Special applications
A.3.1
Reversing circuit
Requirements
Soft stopping is not possible. Set the stopping time on the setting element of the 3RW51 soft
starter to "0 s" (factory setting).
Automatic restart.
Can cause death or serious injury.
If a starting command is pending, a restart will be triggered automatically after the reset. This
particularly applies if the motor protection has tripped. Dangerous states of the system can
result.
Reset the start command (e.g. via the PLC or switch) before performing a reset.
To do this, for example, link the group error output (terminals 95 and 96) into the control.
Wiring
The example shows the 3RW51 soft starter in the inline circuit.
A.3.2
Controlling a motor with a magnetic parking brake
Requirements
• ON / RUN relay output was parameterized to RUN.
Automatic restart.
Can cause death or serious injury.
If a starting command is pending, a restart will be triggered automatically after the reset. This
particularly applies if the motor protection has tripped.
Dangerous states of the system can result.
Reset the start command (e.g. via the PLC or switch) before performing a reset.
To do this, for example, link the group error output (terminals 95 and 96) into the control.
SIRIUS 3RW51 Soft Starter
Equipment Manual, 09/2020, A5E37108631002A/RS-AC/003
WARNING
WARNING
Example circuits
A.3 Special applications
187
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