Functional Safety NCN3-F31K2(M)-N*-B*3-S
Planning
20
19
-1
1
11
3.3
Safety Function and Safe State
Safe State
The safe state of the device is the high impedance state (low current).
Applications with control units or safety functions where the safe state is the low impedance
state (high current) were not evaluated.
Safety Function
Figure 3.1
Distance values for the design of the safety function (abstract figure)
The NAMUR sensor signals the safe state when the reference object is inside of the operating
distance of the respective sensor (s < S
ao
). The assured operating distance S
ao
is 2.1 mm.
This assured operating distance is valid when using a reference object with a size
of 12 mm x 12 mm x 0.4 mm, made of stainless steel 1.4305.
To ensure the safety of the safety loop according to SIL 2, only use control units according
to EN 60947-5-6 (NAMUR).
Reaction Time
The reaction time for all safety functions is < 1 ms.
s
Current operating distance
s
n
Rated operating distance
S
ao
Assured operating distance of a PDBB
S
ar
Assured release distance of a PDDB
S
ao
S
ar
s
n
s
0
Note
See corresponding datasheets for further information.
