Installation and Operational Instructions for ROBA
®
-diskstop
®
Type 894.5_ _._ _ Sizes 9 and 10
(B.8.4.5.EN)
27/08/2020 TK/TL/GC/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 15 of 17
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Release Monitoring (Item 12 / Fig. 5 / Optional)
Please carry out a functional inspection before
brake initial operation!
The ROBA
®
-diskstop
®
brakes are supplied optionally with
manufacturer-side installed and adjusted release monitoring
device (12).
A microswitch emits a signal for every brake condition change:
“brake opened” or “brake closed”.
The customer is responsible for a signal evaluation of both
conditions.
From the point at which the brake is energised, a time span of
three times the separation time must pass before the switch
signal on the release monitoring is evaluated.
Microswitch Wiring Diagram:
Function
When the magnetic coil is energised in the coil carrier (1), the
armature disk (2) is attracted to the coil carrier (1), the
microswitch emits a signal, the brake is released.
Microswitch Specification
Characteristic values for
measurement:
250 V~ / 3 A
Minimum switching power:
12 V, 10 mA DC-12
Recommended switching
power:
for maximum lifetime
and reliability
24 V, 10...50 mA
DC-12
DC-13 with freewheeling
diode!
Usage category acc. IEC 60947-5-1:
DC-12 (resistance load), DC-13 (inductive load)
Wear Monitoring
(Item 13 / Fig. 5 / Optional, only for Size 10)
The ROBA
®
-diskstop
®
brakes are supplied optionally with
manufacturer-side installed and adjusted wear monitoring (13)
device.
Function
Due to wear on the friction linings, the air gap “a” between the
coil carrier (1) and the armature disk (2) increases.
Once the maximum air gap of 1.8 mm (see Technical Data) has
been reached, the microswitch contact switches over and emits
a signal.
The friction pads (4) must be replaced.
The customer is responsible for a signal evaluation.
Microswitch Wiring Diagram:
For switch power values, please see Release
Monitoring
Microswitches cannot be guaranteed fail-safe.
Therefore, please ensure appropriate access for
replacement or adjustment.
The switching contacts are designed so that they
can be used for both small switching powers and
medium ones. However, after switching a medium switching
power, small switching powers are no longer reliably possible.
In order to switch inductive, capacitive and non-linear loads,
please use the appropriate protection circuit to protect against
electric arcs and unpermitted loads!
COM contact
Black connection
NC contact
Grey connection
Connection when
brake closed
NO contact
Blue connection
Connection when
brake released
COM contact
Black connection
NO contact
Blue connection
Connection when
wear limit
has not yet been
reached
NC contact
Grey connection
Connection when
wear limit
has been reached
