Final Decommissioning; Safety Instructions On Function "Safe Torque Off" (Sto) - BONFIGLIOLI Active Cube Series Complement To Operating Instructions

2.9.7

Final decommissioning

Unless separate return or disposal agreements were made, recycle the disassembled frequency inverter
components:

Scrap metal materials

Recycle plastic elements
 Sort and dispose of other component materials
Electric scrap, electronic components, lubricants and other utility materials must be
treated as special waste and may only be disposed of by specialized companies.
In any case, comply with any applicable national disposal regulations as regards environ-
mentally compatible disposal of the frequency inverter. For more details, contact the
competent local authorities.
2.10

Safety Instructions on Function "Safe Torque Off" (STO)

The function „Safe Torque Off" (STO) is a functional safety feature, i.e. it protects staff from damage,
provided that projecting, installation and operation are performed properly. This function does not dis-
connect the plant from power supply.
In order to disconnect the plant from power supply (e.g. for maintenance work), an "Emergency Stop"
provision as per EN 60204 must be installed.
WARNING
Uncontrolled Starting
Improper installation of the safety circuitry may result in uncontrolled starting of the
drive. This may cause serious injuries and significant material damage or death.
 Safety functions may only be installed and commissioned by skilled personnel.
The STO function is not suitable for emergency stop as per EN 60204. An emergency
stop can be realized by installing a mains contactor.
An emergency stop according to EN 60204 must be functioning in all operation modes of
the frequency inverter. Resetting of an emergency stop must not result in uncontrolled
starting of the drive.
The drive is started again when the function STO is no longer triggered.
Without a mechanical brake, the drive will not stop immediately but coast to a standstill.
If this might result in personal or material damage, additional safety measures must be
taken.
 If persons may be endangered after disconnection of the motor power supply by
STO, prevent access to the hazard areas until the drive has stopped.
 Check the safety function at regular intervals according to the results of your risk
analysis. Bonfiglioli Vectron MDS GmbH recommends that the check be performed
after one year, at the latest.
The STO function is fail-safe. However, on rare occasions, the occurrence of component
defects may cause jerking of the motor shaft (max. 180°/pole pair, e. g. jerk by 90° with
4-pole motor, 180°/2).
 Check if this causes a dangerous movement of the machine.
 If the STO function is used, the special safety, installation and instructions on use
instructions shall be complied with.
11/17 Liquid Cooling ACU/ANG/AEC 13