Parameter Assignment For Sm326; Di 8 X Namur - Siemens SIMATIC PCS 7 Operating Manual

Configuring S7F/FH hardware
6.4 Setting system parameters for F-signal modules
6.4.5

Parameter assignment for SM326; DI 8 x NAMUR

Sensor evaluation
● 1oo1 (1v1) evaluation
A sensor connected to the F signal module via a single channel
● 1oo2 (2v2) evaluation
F or a process signal one or two sensors are connected to two opposite inputs on a F
signal module. The signal states of inputs (equivalence or non-equivalence) are
compared internally.
The following safety classes can be achieved:
● 1-channel – SIL 2; in the case of multiple channels SIL 3 can be achieved by means of
voting in the CPU.
● 2-channel – SIL 3 (voting on module)
Group diagnostics
Group diagnostics must be activated for all used channels.
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB