Beckhoff AMI8100, Operating Instructions Manual

Page: 20 / 61

Product overview
20 ─── Version: 1.0 AMI8100
Holding brake [+]
The servo drives can be equipped as an option with permanent
magnet holding brakes. These operate according to the quiescent
current principle and open at a voltage of 24 V
DC
+6/-10 % with >
10,000,000 switching cycles.
The installed holding brake is not suitable for service braking, since
there is no monitoring for wear and functionality by the servo drive
and the configuration. This applies in particular to vertical axes.
Safety measures for vertical axes must be applied
When operating vertical axes, appropriate additional measures
must be taken; for example, including but not only:
• additional redundant brake units
• mechanical safeguards or interlocks
• attachment of a balancing weight
Permanent magnet holding brakes alone are not approved for the
protection of persons. In consideration of ISO 13849-1 and
13849-2, additional precautions must be taken for personal protec-
tion.
If the voltage is interrupted by emergency stop or power failure, the
holding brake is conditionally permissible as a service brake. You
can perform a maximum of 2000 emergency stops from a maximum
of 3000 rpm with a maximum of three times the intrinsic inertia of
the motor. These maximum values may vary due to increased load
inertia.
The function of the holding brake can be checked with a torque
wrench or with TwinCAT Scope.