Connection Of The Brake Using Interface Relay - Siemens SINUMERIK 840D sl Manual

Connection of the Components
5.11 Brake Connection
5.11.3

Connection of the Brake using Interface Relay

The motor holding brake can be attached directly to the provided connecting terminal or
indirectly using an interface relay switched between. This may be necessary, for example,
when the brake rated current I
230 V. It is important, however, that the rated current of the interface relay is > 100 mA to
prevent a fault message from the brake monitoring.
Brake current IBR > 2 A DC
Figure 5-36
Protective circuit for the interface relay is not required because this function exists in the
Motor Module. A protective circuit, however, must be provided for the brake.
Supply voltage not 24 VDC.
Figure 5-37
Protective circuit of the brake coil required. For the choice of the protective circuit, ensure
that the demagnetization of the brake is achieved fast. This is performed, for example, with
varistors for an AC supply power (also refer to the motors configuring guide).
5-76
> DC 2 A or the connection voltage of the brake is 1AC
BR
Brake current IBR > 2 A DC
Supply voltage not 24 VDC.
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0