Fig. 5-3: Dynamization in the case of selection via an active safety unit
When choosing the safety unit, the maximum current
consumption of the selection inputs of all drives of a safety zone
must be taken into account.
Dynamization in the case of selec‐
tion via passive safety units
A passive safety unit is a safety switching device with which the
safe function is selected via isolated contacts.
When the safety functions of the "L options" are selected via a
passive safety unit, the drive checks the wiring of the selection.
When the selection of the safety functions takes place via a passive safety
unit, the drive generates the dynamization pulses and makes them available
via the "dynamization channel A" and "dynamization channel B" outputs.
These two outputs allow supplying the isolated selection contacts of the
passive safety unit.
The figure below illustrates, in schematic form, the interconnection of a
passive safety unit and several drives with an "L option":
Bosch Rexroth AG DOK-INDRV*-SI3-**VRS**-AP06-EN-P
Rexroth IndraDrive Integrated Safety Technology "Safe Torque Off" (as of MPx-16)
46/149
Functional principle of integrated safety technology
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
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