A.2.3 Encoder Systems - Festo CAMC-G-S3 Manual

A Technical appendix
A.2.3 Encoder systems
The relevant standards for the functional safety of electrical drives must always be observed, e.g.
EN 61800-5-2.
Tab. A.19 shows the approved encoder combinations and the maximum achievable Performance Level
and Safety Integrity Level.
P06.00: Selection po­
sition encoder 1
Resolver (X2A)= [1]
Resolver (X2A)= [1]
Resolver (X2A)= [1]
SINCOS / Hiperface
(X2B) = [2]
SINCOS / Hiperface
(X2B) = [2]
SINCOS / Hiperface
(X2B) = [2]
1) Other encoder (X2B) = [4]:
– EnDat encoder without SIL certification
– BISS encoder
– Incremental encoder with A/B/N signals
– Incremental encoder with SINCOS signals
– Hiperface encoder without SIL
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
P06.01: Selection Notes
position encoder 2
Other encoder –
1)
(X2B) = [4]
Incremental en­ –
coder (X10) = [5]
None = [6] Requires a safe shaft
connection.
Resolver must satisfy
the SIL 2 requirements
(MTTFd value, etc.)
Incremental en­ –
coder (X10) = [5]
None = [6] Requires a safe shaft
connection.
Requires a SIL 2-certi­
fied encoder
None = [6] Requires a safe shaft
connection.
Requires a SIL 3-certi­
fied encoder
Achievable safety level
EN 61800-5-2 ISO 13849
SIL 3 Cat. 3 / PL d or
Cat. 3 / PL e
SIL 3 Cat. 4 / PL e
SIL 2 Cat. 3 / PL d
SIL 3 Cat. 4 / PL e
SIL 2 Cat. 3 / PL d
SIL 3 Cat. 3 / PL e
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