Technical data

MHD Sychronous motors Notes Application 16-11
DOK-MOTOR*-MHD********-PR05-EN-P
16.6 Holding Brakes
Use the brake in normal operation only at a standstill and when
performing the drive-internal brake check. The holding brake is required
for holding the axle when the machine is in a de-energized state.
DANGER
Hazardous movements! Persons endangered by
falling or descending axles!
⇒ Observe supplementary DIN and recommendations.
For European countries:
- DIN EN 954 / 03.97 on security-related parts of
controllers.
- Instruction sheet for vertical axes
Issued by:
Süddeutsche Metall-Berufsgenossenschaft
Fachausschuss Eisen und Metall II
Wilhelm-Theodor-Römheld-Str. 15
55130 Mainz, Germany
USA: See National Electric Code (NEC), National
Electrical Manufacturers Association (NEMA) as well
as local building regulations.
The following is generally valid: The national terms
must be observed!
⇒ The serially delivered motor holding brake does not
suffice to ensure protection of persons!
⇒ Ensure protection of persons by superordinate fail-safe
measures.
⇒ Cordon off the hazardous area by means of a safety
fence or a safety screen.
⇒ Additionally secure vertical axes to prevent them from
falling or descending after having switched off the
motor, for instance as follows:
– lock the vertical axis mechanically,
– provide an external braking / collecting / clamping
device, or
– ensure proper weight compensation of the axis.
- Miscellaneous suitable measures.
The brake’s control mechanism must ensure this function in normal
operation. Under the worst load condition of the power supply with a
voltage of 24 V
DC
+/- 10% must be supplied to the motor. To identify a
failure on time during operation, the power supply for the brakes must be
monitored by an undervoltage detection system.
Brake control