Kendrion Binder Magnete GmbH
Operating Instructions 76 ..P..B00
Last updated: 30 Dec. 2009
Page 12
Attention!
In case of DC side switching, additional protective elements (e.g. varistors, spark arresters, etc.) must be
installed to avoid damage such as burns or welded contacts.
Warning!
Work on the brake must only be carried out by suitably qualified personnel. Make sure that no voltage is
applied during brake connection. The specifications on the rating plate and the information provided in the
circuit diagram in the terminal box or in the Operating Instructions must be strictly observed.
Warning!
The brake is a DC operated system. Permanent voltage variations on the power source of the
electromagnetic brake must be limited to +/-10% of the rated voltage.
The following checks must be carried out when connecting the brake:
•
Check that the connecting cables are suitable for the intended use and for the voltage and amperage of
the brake.
•
Check that the connecting cables are secured with screws, clamps or other suitable fixtures to avoid
interruptions in the power supply.
•
Check that the connecting cables are long enough for the intended use and that suitable torsion, strain
and shear relief features as well as bending protections are provided.
•
Check that the PE conductor (only for protection class I) is connected to the earthing point.
•
Check that no foreign matter, dirt or humidity is trapped inside the terminal box.
•
Check that unused cable entries and the terminal box are suitably sealed to ensure compliance with the
protection class requirements to EN 60529.
3.3.2 Microswitch (13) and thermoswitch (11 and 12) connection
The four (2x2) thermoswitches (11 and 12) and the microswitch (13) provided to control the release status of
the spring-applied single-disc brake are factory-connected in series. These safety switches (microswitch (13)
and thermoswitches (11 and 12)) must be tied into the control circuit of the machine (e.g. motor) (see Fig.
Fig. 11/1). This is to ensure that the microswitch (13) prevents any start-up of the machine (e.g. motor)
before the spring-applied single-disc brake has been released. The four (2x2) thermoswitches (11 and 12)
connected in series with the microswitch (13) interrupt the control circuit of the machine (e.g. motor) as soon
as the temperature measured at the individual measuring points of the thermoswitches (field coil (1.2) and
flange (3)) exceeds the maximum permitted temperature. The cover (26) of the connector box (25) must be
removed to allow the connecting cable of the safety switches (microswitch (13) and thermoswitches (11 and
12)) to be installed. The customer-specific connecting cable for the safety switches can be fed into the
connector box (25) of the spring-applied single-disc brake through the cable entry sleeve (30) (M20x1.5)
(see Section 3.3). The cable strands must be connected with the connecting terminal (19) (see Section 3.3,
Fig. 9/2). After completion of these steps, the cover (26) of the connector box (25) must be reinstalled.
Attention!
When fixing the cover (26) to the connector box (25), the M
A
tightening torques of the machine screws
specified in Table 13/1 must be strictly observed.
