Safety engineering
Basics
Introduction
1
1.1
1.1.1
1.1-1
EDS94AYAD EN 2.2
1.1 Basics
1.1.1 Introduction
With increasing automation, protection of persons against hazardous
movements is becoming more important. Functional safety describes the
measures needed by means of electrical or electronic equipment to reduce
or remove danger caused by failures.
During normal operation, safety equipment prevents people accessing
hazardous areas. In certain operating modes, e.g. set-up mode, work needs
to be carried out in hazardous areas. In these situations the machine
operator must be protected by integrated drive and control measures.
Drive-based safety provides the conditions in the controls and drives to
optimise the safety functions. Planning and installation expenditure is
reduced. In comparison to the use of standard safety engineering,
drive-based safety increases machine functionality and availability.
1.1.2 Drive-based safety with L-force | 9400
The controllers of the L-force|9400 range c an be equipped with a safety
module. The functional range of the safety module types varies in order to
optimally implement different applications.
”Drive-based safety” stands for applied safety functions, which can be used
for the protection of persons working on machines.
The motion functions are continued to be executed by the controller. The
safety modules monitor the safe compliance with the limit values and
provide the safe inputs and outputs. When the limit values are exceeded the
safety modules start the control functions according to EN 60204-1 directly
in the controller.
The safety functions are suitable for applications according to IEC 61508
SIL 3 and meet, depending on the module, the requirements of EN 954,
part 1 up to control category 4.
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