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Installation manual
PSC1-C-10 Installation manual V2.6
Page 43 of 173
Version: 57E
4.2.1.3
Classification of the safe digital inputs
4.2.1.3.1
Digital inputs I00 … 13
Digital inputs
Performance Level
that can be achieved
Remark
I00 … I03
I08 …
I13
PL e
Suitable for all types of input elements, with / without
pulses, achievable PL dependent on MTTF
d
of the input
element as well as fault exclusions in the external
cabling
I04 … I07
PL e
Single-channel with pulses:
-
Predominantly high level required (T
High
> 100
* T
Low
)
-
At least one demand/day due to application
-
Fault detection on demand
PL d
Single-channel without pulses:
-
Fault exclusion short-circuit between the
signals and to VCC
-
Fault detection on demand
PL e
Dual-channel:
-
At least one demand/day due to application
-
Fault detection on demand