6 Safety Manual
56
6.10.3 Proof test C
With proof test C, the following values for the proof test coverage (PTC) can be achieved:
Step Action Please note
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: 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.
Verify that the relay output limit value (extra code) has fallen.
Verification that in the event of interrup-
tion of the output current signal, the in-
ternal test identifies the interruption of
the signal path and signals it. Relay
drops out.
Voltage supply Detection of dangerous undetected failures (λ
DU
) PTC
AC 110 to 240 V +10/-15 %, 48 to 63 Hz 0.454 45.4 %
DC 24 V +10/-15 % 0.440 44.0 %
To Next Page
Loading...
