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Functional Safety K-LB-*.*, F*-LB-I, P-LB-*.*.*
Operation
5
Operation
Danger!
Danger to life from missing safety function
If the safety loop is put out of service, the safety function is no longer guaranteed.
•
Do not deactivate the device.
•
Do not bypass the safety function.
•
Do not repair, modify, or manipulate the device.
Operating the device
1.
Observe the safety instructions in the instruction manual.
2.
Observe the information in the manual.
3.
Use the device only with devices that are suitable for this safety application.
4.
Correct any occurring safe failures within 8 hours. Take measures to maintain
the safety function while the device is being repaired.
5.1
Proof Test
This section describes a possible proof test procedure. The user is not obliged to use
this proposal. The user may consider different concepts with an individual determination
of the respective effectiveness, e. g. concepts according to NA106:2018.
According to IEC/EN 61508-2 a recurring proof test shall be undertaken to reveal potential
dangerous failures that are not detected otherwise.
Check the function of the subsystem at periodic intervals depending on the applied
PFD
in accordance with the characteristic safety values provided. See chapter 3.4.
avg
It is under the responsibility of the plant operator to define the type of proof test and the interval
time period.
Equipment required:
•
2 digital multimeters providing the possibility to measure current voltage and resistance
with an accuracy of ±1 %.
•
Power supply with a selectable voltage of 0 V DC to 50 V DC and current limitation.
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