Minarik NRGD-4Q Series, User Manual

Page: 42 / 80

30 Operation
Starting and stopping methods
Warning
Decelerating to minimum speed, regenerative braking, or
coasting to a stop is recommended for frequent starts and
stops. Do not use any of these methods for emergency
stopping. They may not stop a drive that is malfunctioning.
Removing AC line power (both L1 and L2) is the only
acceptable method for emergency stopping.
For this reason, Minarik strongly recommends installing
an emergency stop switch on both the L1 and L2 inputs
(see Figure 5, page 14).
Frequent decelerating to minimum speed or regenerative
braking produces high torque. This may cause damage to
motors, especially gearmotors that are not properly sized for
the application.
Minarik strongly recommends the installation of an external
regen dump circuit if you plan to use the NRGD’s
regenerative braking capability. This will help avoid damage
to the motor and/or drive. Refer to page 20 for information
on connecting an external regen dump circuit.
Automatic restart upon power restoration
After a one-second time delay, all drives automatically run to set
speed when power is applied and the ENABLE input is jumpered.
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