Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 145 of 201
Version: 25F
6 Response times of the PSC1
The response time is an important safety-related property and must be taken into account for
each application / safety function. In the following section the response times for individual
functions, in some case also as a function of other parameters, are listed. If this information is
inadequate for a specific application, the actual response must be validated against the required
behaviour by means of specific measurements. This statement applies in particular also to the
usage of filter functions.
Safety instructions:
• The response times are to be defined for each safety function in the required behaviour
and compared against the actual value with the aid of the following information.
• Particular care is required on the usage of filter functions. Depending on the filter length /
filter time, the response time may be significantly extended; this aspect must be taken
into account in the safety-related design.
• For particularly critical tasks, the response must be validated by means of
measurements.
• On device startup / alarm or error reset, in some circumstances (depending on the
application program) the outputs may become active for the duration of the response
time. This aspect must be taken into account on planning the safety functions
• On the usage of safe fieldbus connections (e.g. PROFIsafe, FSoE) the system
propagation time (watchdog) is to be included in the calculation.
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