Emergency Stop According En 60204 - KEB COMBIVERT F5 Installationsanleitung

Safety Function STO
Regular electromechanical equipment are liable to abrasion. Loss of these equipment occurs
by using the STO function and the maintenance costs are reduced.
Characteristic data for „Safe torque off"
• Power supply for the rotation direction of the motor is interrupted (free-wheeling motor)
• Used when monitoring of standstill is not necessary
• Unintentional starting of the motor is prevented
• No galvanic isolation of the motor from the dc link circuit
What is realized by the STO function related to EN 60204 -1 ?
• Emergency stop can be realized by the STO function, since the mains voltage may re-
main effective.
• Emergency stop can be realized only in connection with a line contactor, which discon-
nects the mains voltage !
3.1

Emergency stop according EN 60204

By using suitable safety switchgear units, stop category 0 and 1 according to EN 60204 -1
can be reached by the STO function in the system. Note chapter 3.6 for safety switchgear
units.
Stop category 0
Stop category 1
Emergency stop to EN 60204 must be functional in all operating modes of the drive module.
The reset of emergency stop may not lead to an uncontrolled start of the drive.
Without mechanical brake the drive leads to coast; motor is free-wheeling. Additional protec-
tive devices must be installed (e.g.locking systems) if damage to persons or property can
occur.
Jerks in error
GB - 18
„uncontrolled stop", i.e. stop by immediate removal of power to the
actuators.
„controlled stop", i.e. power to the actuators is retained to apply
braking until the stop is achieved. The energy is switched off at
standstill.
Restart only The drive restarts if function STO is no longer released. In order
after confir- to comply with EN 60204, it must be ensured by external meas-
mation ures that the drive restarts only after confirmation.
If danger to persons occur after switching off the motor control
Ensure coast
by STO, the entrance to hazard areas must remain closed until
of the motor
the drive stops.
In case of double malfunction it can lead to unwanted jerk, the
rotation angle is depending on the number of poles of the se-
case
lected drive and the gear ratio.