VAA-2E-G4-SN
Transfer time of safety-related information
Dat
e of
iss
ue
20.
05.
2005
24
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: G49 621 776-0 • USA +1 330 4253555 • Sin65 67799091 • Internet http://www.pepperl-fuchs.com
8
Transfer time of safety-related information
The response time depends fundamentally on the monitor. Attention must
be paid to the corresponding documentation and switch-off times of the
actuators.
9
Certificates
Approvals in accordance with EN 954-1/ISO 13849 -1, EN 60947-5-3
10
Summary of the requirements for categories
Summary of the requirements for categories in accordance with
EN 954-1/ISO 13849 -1
Cate
go
ry
Summary of
requirements
System behaviour
1)
Fundamental
principle for
achieving safety
B
The safety-related parts of the machine
control system and/or its components must
be designed, constructed, selected,
composed and combined in accordance
with the applicable standards so that it will be
able to withstand effects that are expected.
If an error occurs, it may
result in a loss of the safety
function.
by selecting
components
1
The requirements of B must be fulfilled.
Use of tried and tested safety-related
components and principles
As was described for
Category B, but with a higher
safety-related reliability of the
safety function
2
The requirements of B and the use of tried
and tested safety-related principles must be
fulfilled. The safety-function(s) must be
tested at suitable intervals of time by the
machine control unit.
REMARK:
What is suitable depends on the application
and the type of machine.
The occurrence of an error
may result in loss of the
safety function between
testing intervals.
Loss of the safety function is
detected by the test.
by the structure
