21
5 Connecting to power supply
VEGAPULS 21 • Two-wire 4 … 20 mA/HART
58351-EN-191014
5.4 Switch-on phase
After connection to the power supply, the device carries out a self-
test:
•
Internal check of the electronics
•
Output signal is set to failure
The current measured value is then output on the signal cable.
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