Festo CAMC-G-S3 Manual page 243

A Technical appendix
Please note
The suitability of the "Standard encoder" and the "Digital incremental encoder" for use
in safe systems up to SIL3 (EN 61800-5-2, EN 61508) as well as PL e (EN ISO 13849)
must be proven separately. For example, it must be shown that the encoders meet the
requirements for CCF, MTTFd, etc. Additionally, it must be shown that the encoders are
suitable for the operating and ambient conditions and meet EMC requirements.
Please note
– The following data on measures and DC is based on the data of EN 61800-5-2, table
in Appendix D.16.
– The manufacturer's specifications must also be used for a safety-related assess­
ment of the position encoder.
– The DC values given for the analysis of the encoder systems in the safety module 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.
SIN/COS encoder / Hiperface encoder
Error acceptance
Short circuit between any two
conductors of the connecting
cable
Interruption of any conductor of
the connecting cable
Static "0" or "1" signal at the in­
puts and outputs, individually or
simultaneously at multiple in­
puts/outputs
Interruption of high-impedance
status on a single input/output
or multiple inputs/outputs sim­
ultaneously
Reduction or increase of the out­
put amplitude
1) Sensitivity and DC in accordance with the parameterised fault limits; specification applies to factory setting
2) Position information is "static" if there is a fault => Fixed commutating position, motor at idle / voltage of a channel static
=> Commutating position changes by max +/-90° of a signal period of an encoder, motor only moves in this range
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
Fault Error detection by the
exclusion safety module
None Individual signal monitor­
ing and vector length mon­
1)
itoring
None Individual signal monitor­
ing and vector length mon­
1)
itoring
None Individual signal monitor­
ing and vector length mon­
1)
itoring
None Individual signal monitor­
ing and vector length mon­
1)
itoring
None Individual signal monitor­
ing and vector length mon­
1)
itoring
Supplementary notes/
comments
In accordance with sec­
tion A.3;
2)
DC > 90%
In accordance with sec­
tion A.3;
2)
DC > 90%
In accordance with sec­
tion A.3;
2)
DC > 90%
In accordance with sec­
tion A.3;
2)
DC > 90%
In accordance with sec­
tion A.3;
2)
DC > 90%
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