Festo CAMC-G-S3 Manual page 259

A Technical appendix
Please note
– The following data on measures and DC is based on the data of the standard
EN ISO 13849-1.
– The manufacturer's specifications must be used for a safety-related assessment of
the switching devices.
– The DC values given are only valid when the specified measures and the specified
additional conditions are complied with.
– Fault exclusions are possible according to the relevant standards, for which the
required conditions must be permanently guaranteed.
Measure
Cyclical test pulse through dynamic
change of the output signals.
Cross-comparison of outputs sig­
nals with dynamic test if short-cir­
cuits cannot be detected (for mul­
tiple inputs/outputs).
Cross-comparison of output sig­
nals with immediate and intermedi­
ate results in the logic (L) and tem­
poral as well as logic program
sequence monitoring and detec­
tion of static failures and short cir­
cuits (for multiple inputs/outputs).
Plausibility check, e.g. use of
outputs switching antivalently.
Tab. A.25 Measures for digital outputs
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
DC Comment
90 Always effective in the
safety module, as the test
pulses for the safe pulse
block and for DOUT40 ... 42
cannot be switched off.
90 Without allocation of test
pulses.
Cyclical change of the input
signals required, e.g.
through the process or regu­
lar actuation.
99 Always effective in the
safety module, as the test
pulses for the safe pulse
block and for DOUT40 ... 42
cannot be switched off
99 Can only be used for
DOUT40 ... 42, in the "anti­
valent" switching configura­
tion.
Use
Cross-circuit monitoring
for 2-channel outputs.
Monitoring of 2-channel
outputs.
Monitoring of 2-channel
outputs
Monitoring of 2-channel
outputs.
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