ABB ACH580-01 Series, Hardware Manual

Page: 107 / 396

Guidelines for planning the electrical installation 107
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 Off 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 345 .
Implementing the ATEX-certified Safe motor disconnection
function (Q971)
Note: Q971 is not available for North America.
With Q971, the drive supplies ATEX-certified safe motor disconnection
without contactor that uses the drive Safe torque off function. For more information,
see
CPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD
(+L537+Q971) user's manual (3AXD50000030058 [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 the motor control mode
and stopping method selected.
When you have selected
• Vector control mode and motor ramp stop, use the following operational sequence
to open the contactor.
1. Give a stop command to the drive.
2. Wait until the drive decelerates the motor to zero speed.
3. Open the contactor.
When you have selected
• Vector control mode and motor coast stop; or scalar control mode, use the
following operational sequence to open the contactor.
1. Give a stop command to the drive.
2. Open the contactor.