Installation and Operational Instructions for
ROBA-stop
®
-Z Type 892.101.0
Size 125
(E073 01 046 000 4 EN)
18/05/2022 TK/HW/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 11 of 16
www.mayr.com
, E-Mail:
Electrical Connection and Wiring
In safety applications, the rules for risk minimisation and error
avoidance (e.g. redundance, diversity, resistance, monitoring etc.)
must be observed during electrical activation.
The power is connected using a 2-core cable (9).
The brake must only be operated with
overexcitation (see Technical Data).
DC current is necessary for operation of the brake. The coil
nominal voltage is indicated on the Type tag as well as on the
brake body and is designed according to the DIN IEC 60038
(± 10 % tolerance). The brake must only be operated with
overexcitation (e.g. using a ROBA
®
-switch or -multiswitch fast
acting rectifier or phase demodulator). The connection
possibilities can vary dependent on the brake equipment. Please
follow the exact connections according to the Wiring Diagram.
The manufacturer and the user must observe the applicable
regulations and standards (e.g. DIN EN 60204-1 and DIN VDE
0580). Their observance must be guaranteed and double-
checked!
Grounding Connection
The brake is designed for Protection Class I. This protection
covers therefore not only the basic insulation, but also the
connection of all conductive parts to the protective conductor (PE)
on the fixed installation. If the basic insulation fails, no contact
voltage will remain. Please carry out a standardized inspection of
the protective conductor connections to all contactable metal
parts!
Device Fuses
To protect against damage from short circuits, please add
suitable device fuses to the mains cable.
Switching Behavior
The reliable operational behavior of a brake is to a large extent
dependent on the switching mode used. Furthermore, the
switching times are influenced by the temperature and the air gap
between the armature disk and the coil carrier (dependent on the
wear condition of the linings).
Magnetic Field Build-up
When the voltage is switched on, a magnetic field is built up in the
brake coil, which attracts the armature disk to the coil carrier and
releases the brake.
Magnetic Field Removal
AC-side switching
The power circuit is interrupted
in front of the rectifier. The
magnetic field slowly reduces.
This delays the rise in braking
torque.
When switching times are not
important, please switch AC-
side, as no protective
measures are necessary for
coil and switching contacts.
AC-side switching means
low-noise switching
; however, the
brake engagement time is longer (approx. 6-10 times longer than
with DC-side disconnection), use for non-critical braking times.
DC-side switching
The power circuit is interrupted
between the rectifier and the
coil as well as mains-side. The
magnetic field reduces
extremely quickly. This causes
a quick rise in braking torque.
When switching DC-side, high
voltage peaks are produced in
the coil, which can lead to wear
on the switching contacts from
sparks and to destruction of the
insulation.
DC-side switching means
short brake engagement times (e.g.
for EMERGENCY STOP operation)
; however, louder switching
noises.
Protection Circuit
When using DC-side switching, the coil must be protected by a
suitable protection circuit according to VDE 0580, which is
integrated in
mayr
®
-rectifiers. To protect the switching contact
from consumption when using DC-side switching, additional
protective measures are necessary (e.g. series connection of
switching contacts). The switching contacts used should have a
minimum contact opening of 3 mm and should be suitable for
inductive load switching. Please make sure on selection that the
rated voltage and the rated operating current are sufficient.
Depending on the application, the switching contact can also be
protected by other protection circuits (e.g.
mayr
®
-spark quenching
unit, half-wave and bridge rectifiers), although this may of course
then alter the switching times.
Coil
F1: external fuse
Coil
F1: external fuse
