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13
The Safe torque off function
Contents of this chapter
This chapter describes the Safe torque off (STO) function of the drive and gives
instructions for its use.
Description
The Safe torque off function can be used, for example, as the final actuator device of
safety circuits that stop the drive in case of danger (such as an emergency stop circuit).
Another typical application is a prevention of unexpected start-up function that enables
short-time maintenance operations like cleaning or work on non-electrical parts of the
machinery without switching off the power supply to the drive.
When activated, the Safe torque off function disables the control voltage of the power
semiconductors of the drive output stage (A, see the diagrams below), thus preventing
the drive from generating the torque required to rotate the motor. If the motor is running
when Safe torque off is activated, it coasts to a stop.
The Safe torque off function has a redundant architecture, that is, both channels must
be used in the safety function implementation. The safety data given in this manual is
calculated for redundant use, and does not apply if both channels are not used.
The Safe torque off function complies with these standards:
Name
Standard
Safety of machinery – Electrical equipment of machines – Part 1:
General requirements
IEC 60204-1:2016
EN 60204-1:2006 + A1:2009 +
AC:2010
The Safe torque off function 181
Содержание ACH480
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Страница 158: ... Frame R1 front side UL Type 1 kit installed 158 Dimension drawings ...
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Страница 162: ... Frame R2 front side UL Type 1 kit installed 162 Dimension drawings ...
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Страница 166: ... Frame R3 front side UL Type 1 kit installed 166 Dimension drawings ...
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Страница 169: ... Frame R4 bottom rear IP20 UL open type Dimension drawings 169 ...
Страница 170: ... Frame R4 front side UL Type 1 kit installed 170 Dimension drawings ...
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Страница 198: ... Declaration of conformity 198 The Safe torque off function ...
Страница 206: ...Dimensions 206 BIO 01 I O extension module ...
Страница 212: ...Dimensions 3AXD50000031148 rev A 212 BREL 01 relay output extension module ...