3 inputs, Inputs – Pilz PSSu K F FCU User Manual
Page 12
Function description
Operating Manual PSSu K F FCU
1002391-EN-04
12
Inputs
Digital inputs I00 ... I07 with fast shutdown:
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These inputs form 4 input pairs (I00 and I01, I02 and I03, I04 and I05, I06 and I07). If
these input pairs are used it is possible to achieve PL e (Cat 4) and SIL CL 3.
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Depending on the configuration, a signal change at these inputs can lead to an immedi-
ate shutdown of the module's outputs (fast shutdown) see
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The edge used to trigger the fast shutdown can be configured (default values
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A joint input filter can be configured for these 8 inputs.
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The inputs can be used to connect OSSDs, for example.
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Test pulses can be used to check the inputs for shorts across contacts and correct
functionality.
NOTICE
Possible loss of safety functions by using test pulses!
The duration of the test pulse can be longer than the configured input filter
time, whereby input signals are not detected. That way, an output may not
safely shut down and, depending on the application, may cause serious in-
jury and death.
Make sure that you always use an input pair for an input signal and that you
assign different test pulses (T00 or T01) to the inputs of the input pair.
Digital inputs 108 ... I11 without fast shutdown:
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A signal change at these inputs is signalled to the head module.
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The inputs can be used to connect safety switches, for example.
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A joint input filter can be configured for these 4 inputs.
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Test pulses can be used to check the inputs for shorts across contacts and correct
functionality.
Test pulse outputs
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2 test pulse outputs that use different test pulses (test pulse T00, test pulse T01)
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Short circuit-proof
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Overload-proof
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Free from feedback
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Current-limiting
Detection of shorts across contacts
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The test pulses are used to detect shorts between inputs. Shorts between inputs are
detected when the test pulses are different (test pulse T00, test pulse T01).
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Only the module's test pulses may be used to detect shorts.
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The module's test pulses may not be used to detect shorts between inputs on other
modules.
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Shorts between inputs of the same module with the same test pulses will not be detect-
ed.
4.3