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8
Option description and instructions
Contents this chapter
This chapter describes the +Q964 emergency stop option and instructs how to wire, start
up, test, validate, use and maintain it. The safety data is also given.
Overview
Option +Q964 corresponds to a controlled stop in accordance with stop category 1 (EN/IEC 60204-1).
The option corresponds to the Safe Stop 1 (SS1) function. After the emergency stop command has been
given, the drive first decelerates the motor(s) to zero speed according to a preset ramp time. Then, the
option activates the Safe torque off (STO), this prevents the drive from generating the torque required
to rotate the motor(s). The mains contactor/breaker of the drive is not opened.
For a detailed description of the Safe torque off function, see the appropriate hardware manual.
The SS1 and STO functions comply with EN/IEC 61800-5-2:2016. Option +Q964 has been designed
according to the principles of EN ISO13850.
Related standards and
For a complete list of related standards and European directives, see section
directives
on page 22 .
Note: Drives with the Prevention of unexpected start-up (POUS) option (+Q957):
If the user activates the POUS function during the emergency stop deceleration ramp, it overrides the
emergency stop function. POUS activates the Safe torque off (STO) function of the drive immediately
and the motor coasts to a stop. For more information on the POUS safety function, see Prevention of
unexpected start-up (option +Q957) for DCS8x0-A cabinet drives (3ADW000504).
Basic timing diagram
Speed
Inactive
Active
E-Stop
Running
Ramp down
STO
Drive Status
Option description and instructions
3ADW000508R0201+Q964 E-Stop cat.1 without opening mains contactor en b
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