Siemens Sinumerik 840D sl Function Manual page 34

Brief description
2.1 Control/drive system
The systems with integrated safety technology generally respond very quickly
when the permissible limit values are violated, e.g. position and velocity limit
values. They can be of decisive importance for the required monitoring result. The
integrated safety technology can directly access the power semiconductors in the
drive controller without using electromechanical switching devices in the power cir-
cuit. This helps reduce the susceptibility to faults -- and the integration also reduces
the amount of cabling.
A combination of safety technology integrated in the system and drive can be used
for each axis at a machine tool (SINAMICS Basic Safety functions).
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
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