Installation and operational instructions for
ROBA
®
-servostop
®
Type 8980.00_00
Sizes 50 - 160
(B.8980.EN)
06/10/2022 GF
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 12 of 26
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5
Technical Data
5.1
Guidelines
5.1.1
Application Conditions
The catalogue values are guideline values
which have been determined in test
facilities. It may be necessary to carry out
your own tests for the intended application.
When dimensioning the brakes, please
remember that installation situations,
braking torque fluctuations, permitted
friction work, bedding-in condition /
conditioning of the brake linings and wear
as well as general ambient conditions can
all affect the given values. These factors
should therefore be carefully assessed,
and alignments made accordingly.
Mounting dimensions and connection dimensions
must be adjusted according to the size of the
brake at the place of installation.
Use of the brake in extreme environmental
conditions or outdoors, directly exposed to the
weather, is not permitted.
The brakes are designed for a relative duty cycle
of 100 %.
The braking torque is dependent on the following
factors:
- Bedding-in condition of the rotor (4)
- Ambient temperature
-
Age of the rotor’s friction lining (4)
The brakes are only designed for dry running.
The torque is lost if the friction surfaces come into
contact with oil, grease, water or similar
substances or any other foreign bodies.
The outer components have been provided with a
phosphated or a gas-nitrated surface
manufacturer-side to form a basic corrosion
protection.
CAUTION
The rotors (4) may rust up and seize up in
corrosive ambient conditions and / or after
longer downtimes.
The user is responsible for taking
appropriate countermeasures.
5.1.2
Ambient temperature/Climate Conditions
The electromagnetic brake is suitable for applications
with an ambient temperature of between -20 °C and
+120 °C.
CAUTION
Reduction in braking torque possible
Condensation can form on the brake and
cause a loss in braking torque:
due to fast changes in temperature
at temperatures of around or under
freezing point
The user is responsible for taking
appropriate countermeasures (e.g. forced
convection, heating, drain screw).
CAUTION
Brake malfunction possible
Condensation can form on the brake and
cause malfunctions:
at temperatures around or under
freezing point, the brake can freeze
over and not release any more.
The user is responsible for taking
appropriate countermeasures (e.g. forced
convection, heating, drain screw).
The system function must be checked by the user after
longer downtimes.
At high temperatures and in high humidity
or with occurring dampness, the rotor (4)
can seize up to the armature disk or the
bearing shield / the flange plate after
longer downtimes.
5.1.3
Class of Insulation F (+155 °C)
The insulation components on the magnetic coils are
manufactured at least to class of insulation F (+155 °C).
5.1.4
Protection
(mechanical) IP20:
Protection against fingers or similar-
sized objects, against medium-sized foreign bodies > 12
mm in diameter. No protection against water.
(electrical) IP54:
Dust-proof and protected against
contact as well as against water spray from any direction.
