Baumuller BUM64A, Manual

Page: 110 / 120

The safety relay
Manual Single Power Unit BUM64S/A/F
Document no.: 5.01056.03
Baumüller Nürnberg Electronic GmbH & Co. KG
110
of 118
The closing- and opening sequence of the release signals as well as of the safety relay must be
considered in order to assure a faultless operation of the drive.
Figure 30: Sequence diagram of the safety relay
Baumüller-devices of the series BUM 6, BUS 6 and BKH, which are made with one safety relay
(optional), comply with the requirements of the category 3 (EN 954-1) for the safety-relevant us-
ing “protection against unexpected starting”, if the configuring and installation instructions are
complied with.
Before the commissioning of the machine, in which the converter with the safety relay is built in,
the safety function “protection against unexpected starting” must be checked. For that purpose
a safety device must be executed (for example door contact). The motor must now be zero-
torque.
If the reliability performance of the “protection of unexpected starting” once has been deter-
mined, then this safety function of the converter doesn´t have to be checked by an external mon-
itoring, as the device checks itsself on possible errors and if necessary displays a message as
well as turns off the drive.