Pilz PNOZ m EF 4DI4DOR - Manual (Page 18)

Technical details
Operating Manual PNOZ m EF 4DI4DOR
1002702­EN­02 18
8.1 Safety characteristic data
Unit Operating
mode EN ISO
13849­1: 2008
PL
EN ISO
13849­1: 2008
Category
EN IEC 62061
SIL CL
EN IEC 62061
PFH
D
[1/h]
EN ISO
13849­1: 2008
T
M
[year]
Logic
CPU – PL e Cat. 4 SIL CL 3 2,84E­10 20
Input
SC inputs 1­channel PL d Cat. 2 SIL CL 2 2,10E­09 20
SC inputs 2­channel PL e Cat. 4 SIL CL 3 4,27E­11 20
SC inputs 1­ch., pulsed
light beam
device
PL e Cat. 4 SIL CL 3 2,10E­10 20
Output
Relay outputs 1­channel PL c Cat. 1 ­ 3,75E­08 20
Relay outputs 2­channel PL e Cat. 4 SIL CL 3 7,52E­12 20
Requirement on 1­channel relay outputs for Category 1 in accordance with EN 13849­1: An
additional output switches to a safe condition in the event of an error or, if that is im­
possible, signals a hazardous condition.
All the units used within a safety function must be considered when calculating the safety
characteristic data.
INFORMATION
A safety function's SIL/PL values are not identical to the SIL/PL values of
the units that are used and may be different. We recommend that you use
the PAScal software tool to calculate the safety function's SIL/PL values.
CAUTION!
It is essential to consider the relay's service life graphs. The relay outputs'
safety­related characteristic data is only valid if the values in the service life
graphs are met.
The PFH value depends on the switching frequency and the load on the relay output. If the
service life graphs are not accessible, the stated PFH value can be used irrespective of the
switching frequency and the load, as the PFH value already considers the relay's B10d
value as well as the failure rates of the other components.