Wittur WSG-21.2 Serie Instrucciones De Funcionamiento página 54

Installation and Operational Instructions for
®
ROBA -diskstop
Installation of Bowden Cable Hand Release
The hand release is pre-assembled manufacturer-side.
For the max. hand release forces, see Table 5, page 9.
For the Bowden cable installation, one bore each is provided on
the brake caliper and on the hand release lever. The hand
release can be moved by approx. 18°, at the latest until the
spring pins (9) limit the stroke. Adjust the Bowden cable so that
the hand release (after actuation) returns to its limit
=> Functional inspection.
Brake Inspection
(before brake initial operation)
 Visual inspection:
for proper condition of the brake (rust etc.) and no grinding.
 Carry out a release inspection:
by energising the brake or manually by actuating the hand
release.
 Switch functions inspection of the release monitoring /
for connection as NC contact:
Brake energised
Brake de-energised
for connection as NO contact:
Brake energised
Brake de-energised
The braking torque is not achieved until after the run-in
procedure has been carried out.
The run-in conditions must be aligned with the manufacturer.
Braking Torque
The (nominal) braking torque is the torque effective in the shaft
train on slipping brakes, with a sliding speed of 1 m/s referring to
the mean friction radius.
The brake is loaded statically when used as a service brake and
loaded dynamically in EMERGENCY STOP operation (part of
the brake equipment against overspeed or inadvertent
movement of the elevator cage). Respectively, there are different
speed values for the friction material, which in practice also leads
to different friction values and therefore braking torques.
The braking torque is dependent on the respective run-in
condition of the friction surfaces.
We recommend allowing the friction surfaces to run in when
installed and under permitted loads.
Friction materials develop their optimum effect only under speed
at the appropriate contact pressure, as continuous regeneration
of the friction surface then takes place (torque consistency).
Furthermore, friction materials (synthetic resin bonded rubber
mixtures) are subject to ageing, which is also influenced, among
other things, by higher temperatures and other ambient
influences. We recommend regular inspection of the braking
torque (1 x per year) including the respective dynamic braking
actions as a refresher.
29/03/2016 TK/GB/SU
Page 14 of 16
®
Type 894. _ _._ _ Sizes 6 – 8
Signal "OFF"
Signal "ON"
Signal "ON"
Signal "OFF"
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
www.mayr.com, E-Mail:
Release Monitoring (Item 19 / Fig. 1 / 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.
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
microswitch signal on the release monitoring is evaluated.
Microswitch Wiring Diagram:
1
COM Contact
Black connection
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:
Minimum switching power:
Recommended switching
power:
for maximum lifetime
and reliability
Usage category acc. IEC 60947-5-1:
DC-12 (resistance load), DC-13 (inductive load)
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!
[email protected]
(B.8.4.3.EN)
NC contact
Grey connection
Connection when
2
brake closed
4
NO contact
Blue connection
Connection when
brake released
250 V~ / 3 A
12 V, 10 mA DC-12
24 V, 10...50 mA
DC-12
DC-13 with freewheeling
diode!