Description Of The Safety Function Sto; Product Overview; Purpose; Interfaces - Festo CMMS-AS G2-STO Series Manual

2

Description of the safety function STO

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.
1
2
1
Top side of housing
2
I/O interface [X1]
Fig. 2.1 Motor controller CMMS-AS-...-G2
Festo – GDCP-CMMS-AS-G2-S1-EN – 1306NH – English
3
Bottom side of housing
4
STO interface [X3]
3
4
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