Bosch rexroth ctrlX SAFETY SafeMotion Applications Manual page 34

ctrlX SAFETY "SafeMotion"
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Dynamization
Fig. 5: Dynamization in the case of selection via an active safety unit
When choosing the safety unit, the maximum current consumption of the selec-
tion inputs of all drives of a safety zone has to be taken into account.
Dynamization in the case of selection via passive safety units
A passive safety unit is a safety relay in which the safe function is selected via
dry contacts.
To select the safety function via a passive safety unit, dynamized selection
signals which have to be monitored are required to detect errors in the wiring.
The dynamization pulses can be generated by an active safety unit. The dynami-
zation outputs of the active safety unit allow the isolated selection contacts of
the passive safety unit to be supplied.
When the safety functions are selected via a passive safety unit, the active
safety unit checks the wiring of the selection.
Due to the corresponding configuration, the local output on the safety tech-
nology option modules can also be used as dynamization output. The local
output on the optional safety technology module allow the isolated selection
contacts of the passive safety unit to be supplied. Wiring of the selection is
monitored by the optional safety technology module or by the active safety unit
by evaluating the dynamization pulses at the output.
The figure below schematically illustrates the interconnection of a passive
safety unit and multiple drives with an optional safety technology module:
Bosch Rexroth AG R911404905, Edition 02