JUMO dTRANS T06 Ex, Руководство по эксплуатации

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6 Safety manual
54
6.10.3 Proof test C
With proof test C, the following values for the proof test coverage (PTC) can be achieved:
Voltage supply Detection of dangerous undetected failures (
λ
DU
) PTC
DC 24 V +10/-15 % 0.464 46.4 %
Step Action Remark
1 Test the current device status of the test piece with the setup program.
Status must be 'OK'
2 If active, deactivate SIL operation of the test piece.
Configure analog output for simulation of current output signal.
Simulate the following output signal values and verify either using down-
stream devices in the operating facility or using a current meter that is ad-
ditionally connected: Verification of the proper function of the
analog output including whether the er-
ror signal values can be generated.
Simulated value: Expected measured value:
3.6 mA 3.59 to 3.61 mA
8 mA 7.99 to 8.01 mA
16 mA 15.99 to 16.01 mA
21.2 mA 21.19 to 21.21 mA
3 Reactivate SIL operation.
Disconnect the line of the analog output signal at connection 42(+).
The test piece must signal an error after approx. 5 s. Verification that, in the event of an inter-
ruption to the output current signal, the
internal test identifies the interruption of
the signal path and signals it.