2
Description of the safety function STO
Festo – GDCP-CMMS-AS-G2-S1-EN – 1306NH – English
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2
Description of the safety function STO
2.1
Product overview
2.1.1
Purpose
As processes become increasingly automated, protecting people from potentially hazardous move-
ments is gaining in importance. Functional safety describes required measures by electrical or electron-
ic equipment to reduce or eliminate malfunction-induced dangers. In normal operation, protective
devices prevent human access to hazardous areas. In certain operating modes, during set-up, for ex-
ample, people need to be in hazardous areas. In such situations, the machine operator must be protec-
ted by drive and internal control measures.
The functional safety technology integrated in the motor controller meets the requirements of the con-
troller and drive for optimised realisation of protective functions. Planning and installation complexity is
reduced. The use of integrated functional safety technology increases machine functionality and avail-
ability over the levels achieved by conventional safety technology.
2.1.2
Interfaces
The motor controller CMMS-AS-...-G2 has 2 interfaces for control of the STO safety function.
2
3
1
4
1
Top side of housing
2
I/O interface [X1]
3
Bottom side of housing
4
STO interface [X3]
Fig. 2.1
Motor controller CMMS-AS-...-G2