schmersal PSC1 - Classification of the Safe Digital Inputs

Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 49 of 201
Version: 25F
4.2.1.3 Classification of the safe digital inputs
4.2.1.3.1 Digital inputs I00 … I13
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