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34 Technical data
Supported safety encoders
•
Differential push-pull HTL encoders
•
Supply voltage: 15 V DC
•
Only safety-certified encoders are supported.
The safety encoder must indicate its internal faults either by
•
setting its outputs to the hi-Z state ("floating" the outputs) or
•
setting its complement outputs to identical states.
Note: The FSE-31 module does not support the use of a separate
error indication signal from the safety encoder.
The installation and use must comply with the safety encoder
manufacturer's instructions related to, for example, installation,
maximum cable lengths, etc.
Supported encoder cables
•
Double-shielded twisted-pair cable (Draka JAMAK
4×(2+1)×0.5 mm
•
The maximum cable length depends on the encoder type,
cable type, and cable termination. For more information, see
the encoder manufacturer's data.
Safety performance
When the FSE-31 module and a safety encoder are used in a
safety function with a SIL/PL requirement, the safety encoder must
be SIL/PL classified. The user must make sure that the SIL/PL
capability of the safety encoder and the complete safety function
meets the required SIL/PL. This includes the possible application
of, for example, a signal splitter.
Examples of the SIL/PL capability of the safe speed
measurement:
Safety performance with an HTL encoder classified to SIL 3,
SILCL 3, PL e and the FSE-31 and FSO-21 modules:
•
SIL 3, SILCL 3, PL e
2
or equivalent)
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