ABB ACS880-07CLC, User Manual, Page: 15 / 40

Option description
Contents of this chapter
This chapter describes the +Q951 emergency stop option and its settings.
Overview
Q951 corresponds to an uncontrolled stop in accordance with stop category 0
(IEC/EN 60204-1). When the user gives the emergency stop command, the drive opens
the main contactor/breaker, which disconnects the input power from the drive. The motor
coasts to a stop.
The drive main circuit is de-energized while the emergency stop is active and the main
contactor/breaker is open, but the auxiliary circuit stays energized. Note that activating the
emergency stop function does not isolate the drive or motor from dangerous voltages.
The design principles of the Q951 comply with EN ISO 13850.
For a list of related standards and European directives, see section Related standards and
directives (page 37) .
Operation principle
The figure shows a simplified operation principle. The user is responsible for the installation
of the main contactor/breaker and its control and monitoring circuits. Also, the implementation
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