BBH SMX 12-2 - 4 Safety related characteristics; 4.1 General design, safety related architecture and characteristic data

Installation manual
HB-37350-810-01-51F-EN SMX Installation manual.docx Page 55 of 234
Version: 50F
4 Safety related characteristics
4.1 General design, safety related architecture and characteristic data
The inner structure of SMX series consist of two separate channels with reciprocal comparison
of results.
High quality diagnoses for fault detection are made in each of the two channels.
With respect to architecture and function the internal structure corresponds with category 4 of
EN 13849-1.
I
A
O
A
L
A
I
B
O
B
L
B
m
m
i
i
c
i
m
i
m
Sensor PES Aktuator
S
A
S
B
The overall architecture therefore corresponds with the following structure:
Sensor PES Aktuator
Dual reading of each input and diagnose by cross-comparison
The specific safety related characteristic data of the corresponding module can be taken from
the technical characteristic data in chapter 3.
The characteristic data specified in chapter 3 (e.g. PI e and PFH-value acc. to table as
evidence acc. to EN 13849) for the partial system PES can be used for the safety related
assessment of the overall system.