82 Planning the electrical installation
Implementing the Emergency stop function
For safety reasons, install the emergency stop devices at each operator control
station and at other operating stations where emergency stop may be needed.
Design the emergency stop according to relevant standards.
Note: Pressing the stop key on the control panel of the drive does not generate
an emergency stop of the motor or separate the drive from dangerous potential.
Implementing the Safe torque off function
See chapter Safe torque off function on page 231.
Implementing the undervoltage control (power-loss ride-
through)
See ACS580 standard control program firmware manual (3AXD50000016097
[English]).
Using a safety switch between the drive and the motor
It is recommended to install a safety switch between the permanent magnet motor
and the drive output. This is needed to isolate the motor from the drive during
maintenance work on the drive.
Using a contactor between the drive and the motor
Implementing the control of the output contactor depends on how you select the drive
to operate. See also section Implementing a bypass connection on page 83.
When you have selected to use
• Vector control mode and motor ramp stop,
open the contactor as follows:
1. Give a stop command to the drive.
1. Wait until the drive decelerates the motor to zero speed.
2. Open the contactor.
When you have selected to use
• Vector control mode and motor coast stop; or scalar control mode,
open the contactor as follows:
1. Give a stop command to the drive.
2. Open the contactor.
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