Immediate Removal Of Power (Category 0); Controlled Emergency Stop (Category 1); Restart; Prevention Of Unexpected Start - ABB ACS 600 MultiDrive Safety And Product Information

Immediate Removal of
Power (Category 0)
Controlled Emergency
Stop (Category 1)

Restart

Prevention of
Unexpected Start
ACS 600 MultiDrive
Table 1 Standards.
EN 292-1: 1991 Safety of machinery - Basic concepts, general principles for
design - Part 1: Basic terminology, methodology
EN 292-2: 1991 Safety of machinery - Basic concepts, general principles for
design - Part 2: technical principles and specifications
EN 418: 1992 Safety of machinery - Emergency stop equipment,
functional aspects - Principles for design
Safety of machinery - Safety related parts of control
EN 954-1: 1996
systems - Part 1: General principles for design
Safety of machinery - electrical equipment of machines -
EN 60204-1: 1992
Part 1: General principles for design
+ Corr. 1993
After pressing the emergency stop push-button the power
semiconductors of the inverter are blocked (coast stop) and the main
contactor (or air circuit-breaker) is opened immediately. No attention is
paid to deceleration of the speed of the motor shaft after the
emergency stop is activated.
The installer has to make sure that the overriding control fulfils the
requirements of EN 60204-1, category 1.
1. Upon receiving the emergency stop signal, each inverter starts
braking (by ramp or torque limits) and acknowledges the signal by
closing its output contact. (If the emergency stop signal is not
acknowledged by all inverters within two seconds, the supply main
contactor is opened.)
2. After a delay set with a time relay in the emergency stop circuitry,
the supply main contactor is opened. The time delay should be set
slightly longer than the inverter stop ramps to ensure controlled
braking of all inverters.
In order to restart the drive system after an emergency stop, the
emergency stop push-button has to be released and a reset given
before the main contactor (or air circuit-breaker) can be closed and the
drive started.
For personnel safety, it must be possible for the operator to prevent
unexpected start of the drive while the production machine is serviced.
Note: Prevention of Unexpected Start must not to be used for stopping
the drive when the inverter is running. A Stop command must be given
instead.
The ACS 600 MultiDrive can be equipped with an optional Prevention
of Unexpected Start according to the standards: EN 292-1: 1991,
EN 292-2: 1991, EN 954-1: 1996, EN 60204-1-1: 1992 + Corr. 1993
(refer to Table 1) and EN 1037: 1995.
Safety Instructions
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