Sensor For 1Oo2 Mode - Siemens SIMATIC KP8 Operating Instructions Manual

Planning the use
3.7 Requirements for fail-safe operation
Fault detection
Faults can be detected if the following connection errors are present:
● Short-circuit between two sensors
● Short-circuit to DC 24 V
Signal duration
In order to assure accurate detection of the sensor signal by the HMI device, you must
ensure that the minimum duration for the sensor signal is adhered to. Refer to chapter
"Technical specifications (Page 84) ".
See also
Connect KP8F - fail-safe inputs (Page 46)
3.7.2

Sensor for 1oo2 mode

The following safety categories can be achieved with the HMI device:
● SIL3 corresponding to IEC 61508:2010
● PL e corresponding to IEC 13849:2006
● Category 4 corresponding to EN 954:1996
Note
Have the fail-safe part of the system checked and accepted by a registered company in
regards to the prescribed technical safety controls before commissioning the HMI device.
Sensor Requirements for Fail-Safe Sensors
NOTICE
Qualified sensor
If you do not use any qualified, normed sensors, the safety categories SIL3, PL e and
category 4 will not be reached.
Only use qualified sensors corresponding with IEC 60947.
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Operating Instructions, 10/2010, A5E03284305-01
KP8, KP8F