
Installation manual
PSC1-C-10 Installation manual V2.6
Page 44 of 173
Version: 57E
4.2.1.3.2
Digital inputs I/O (IQIx)
Note:
The achievable PL for a combination of hardware inputs and functional inputs is dependent on the
operative/organisational tests selected and the independence of the two channels in the system
layout. An application-related analysis is required to determine the PL.
Digital inputs
Achievable
Performance Level
Remark
IQIx
Without pulse, single-channel static signal
-> Signal input
PL e
Without pulse, dual-channel static signal
-
At least one demand/day due to application
-
Fault detection only on demand
PL d
Without pulse, dual-channel static signal
-
Less than one demand/day due to application
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 only on demand
PL d
Single-channel with pulses
-
Less than one demand/day
PL e
Dual-channel with pulse 1 and pulse 2