Functional Safety KFD2-VR4-Ex1.26
Operation
2018-03
15
Proof Test Procedure A
1. Prepare the test set-up, see next figure.
2. Connect an input load of 2.1 k to terminals 4+ and 5-.
3. Connect an output load of 10 k to terminals 7- and 8+.
4. Connect the power supply to terminals 11+ and 12- or via Power Rail.
5. Connect a voltage source to terminals 4 (common) and 2 (input).
6. Apply voltages of -5 V, -10 V. -20 V at the input.
7. Measure the output voltage.
The output voltage must be within ± 200 mV.
8. Disconnect the ancillary equipment.
9. Set back the device to the original settings after the test.
10. Restore the safety loop.
Proof Test Procedure B
1. Prepare the test set-up, see next figure.
2. Connect an input load of 2.1 k to terminals 4+ and 5-.
3. Connect an output load of 10 k to terminals 7- and 8+.
4. Connect the power supply to terminals 11+ and 12- or via Power Rail.
5. Apply a voltage of -2 V DC + 1.414 V
rms
sine wave at 20 kHz at the input.
6. Measure the amplitude of the sine wave at input and output.
The output voltage amplitude must be at least 0.891 times the input voltage amplitude
(i. e. the reduction in amplitude must not exceed 1 dB).
7. Disconnect the ancillary equipment.
8. Set back the device to the original settings after the test.
9. Restore the safety loop.
Input voltage Output voltage
-5 V -5 V ± 200 mV
-10 V -10 V ± 200 mV
-20 V -20 V ± 200 mV
Table 5.1
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