Installation and Operational Instructions for
ROBA
®
-takt clutch brake unit with 'energise to engage' brake
Type 67_.0_ _._ Sizes 3 to 7
(B.6.1.EN)
21/06/2018 GC/SI/EI/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
Page 6 of 7
Electrical Connection
The electrical connection of the clutch and brake coil is produced
in the standard series via a 4-pole terminal, which is installed in
the terminal box.
When wiring the clutch brake unit, please make sure that the
clutch and brake are not energised at the same time.
Both coils can be energised either directly via a present source
of DC voltage
while observing the required slope separation,
or by using a ROBA
®
-takt control unit or ROBA
®
-takt circuit
module.
The ROBA
®
-takt control unit and the ROBA
®
-takt circuit module
are supply and control devices for quick switching of the clutch
and brake coil:
The ROBA
®
-takt control unit is mains connection-side (230
VAC) and offers adjustable slope separation between the
clutch and the brake as well the possibility to switch the 24V
coils quickly via overexcitation.
The ROBA
®
-takt circuit module does not have an
overexcitation function and requires a coil voltage of 24 VDC
supply-side.
Both Wiring Diagrams and Installation and Operational
Instructions are part of the device delivery.
Brake
Clutch
Slope separation
Slope separation
Clutch
Brake
Diagram 1
The slope separation avoids simultaneous
occurrence of clutch and braking torques.
Table 1
ROBA
®
-takt
Size
3
4
5
6
7
Slope separation
with overexcitation [ms]
29
33
43
65
106
Slope separation
without
overexcitation
[ms]
22
28
37
52
95
When electromagnetic devices are switched off, cut-off peaks
may occur. These can lead to destruction of the device and must
therefore be damped. The damping can have a negative effect
on the switching times stated in the catalogue. Ensure that the
voltage supply is fused acc. the current values.
Installation
Clutch brake unit with flange:
The shafts, centerings, screw-on pitch circles and flange
diameters are produced acc. IEC standard.
The drive and output sides can be screwed together with the
respective flanges of the motor, the gearbox or other clutch
brake units without any problems, see Fig. 2.
Fig.2
Installation of the drive elements:
The drive elements are mounted onto the respective shafts and
secured axially via a press cover and a screw screwed into the
threaded centre hole of the shaft, see Fig. 3.
For the combination motor shaft - ROBA
®
-takt hollow shaft, the
motor shaft must be greased slightly to prevent fretting corrosion
(copper paste is recommended).
Pressing the drive elements or mounting via hammer blows are
not permitted, as the shaft bearings might be damaged.
Radial loads acting on the shaft via the drive elements must not
exceed the permitted values (see chapter “Permitted Shaft
Load”).
Should both radial and axial loads be present on the shaft, the
permissible loads must be determined (please contact the
manufacturers).
Fig. 3