The Safe torque off function 223
14
The Safe torque off function
What this chapter contains
This chapter describes the Safe torque off (STO) function of the inverter (ie. the inverter
unit of the drive) and gives instructions for its use.
Description
The Safe torque off function can be used, for example, to construct safety or supervision
circuits that stop the inverter in case of danger (such as an emergency stop circuit).
Another possible application is a prevention of unexpected start-up switch 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 inverter.
When activated, the Safe torque off function disables the control voltage of the power
semiconductors of the inverter output stage (A, see diagram below), thus preventing the
inverter 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 of the inverter complies with these standards:
Standard
Name
EN 60204-1:2006 + AC:2010
Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
IEC 61326-3-1:2008
Electrical equipment for measurement, control and laboratory use – EMC
requirements – Part 3-1: Immunity requirements for safety-related
systems and for equipment intended to perform safety-related functions
(functional safety) – General industrial applications
Содержание ACS880-17
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Страница 197: ...Dimensions 197 Frame 1 R8i 1 R8i top cable entry exit H351 H353 ...
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Страница 199: ...Dimensions 199 Frame 1 R8i 1 R8i with sine output filter E206 ...
Страница 200: ...200 Dimensions Frame 2 R8i 2 R8i eg ACS880 37 1110A 3 IP22 ...
Страница 201: ...Dimensions 201 Frame 2 R8i 2 R8i eg ACS880 37 1210A 3 IP54 ...
Страница 202: ...202 Dimensions Frame 2 R8i 2 R8i with main breaker F255 and common motor terminal cubicle H359 1 2 ...
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Страница 204: ...204 Dimensions Frame 2 R8i 2 R8i with main breaker F255 and top entry top exit H351 H353 1 2 ...
Страница 205: ...Dimensions 205 Frame 2 R8i 2 R8i with main breaker F255 and top entry top exit H351 H353 2 2 ...
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Страница 213: ...Dimensions 213 Units with main breaker 600 mm bottom cable entry Units with main breaker 600 mm top cable entry ...
Страница 217: ...Dimensions 217 Sine filter E206 cubicle 1000 mm top cable exit ...
Страница 219: ...Dimensions 219 Cubicle width 300 mm double busbar version bottom cable exit Cubicle width 300 mm top cable exit ...
Страница 220: ...220 Dimensions Cubicle width 300 mm double busbar version top cable exit Cubicle width 400 mm bottom cable exit ...
Страница 221: ...Dimensions 221 Cubicle width 400 mm top cable exit Cubicle width 600 mm bottom cable exit ...
Страница 222: ...222 Dimensions Cubicle width 600 mm top cable exit ...
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