Beckhoff EL3681 Documentation page 140

Commissioning
◦ Can be connected to the device electronics, for example for supplying power to the device or as a
signal feedback (see chapter Ground reference: single-ended/differential typification [} 129]).
Refer to the respective device documentation.
◦ Example: PGND is not connected to the device electronics (the analog signal refers to a separate
AGND):
• AGND
◦ Also called: GND
◦ AGND electrically designates the device's analog reference ground.
◦ AGND can, for example, be internally connected to PGND or to a connection point so that it can
be connected externally to a desired potential. Electrical restrictions according to the device
documentation must be observed, e.g. common mode limits.
◦ AGND is usually a currentless reference potential. The action of interference on AGND must be
avoided.
◦ Example: AGND is fed out on the device plug:
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, GND, analog ground, GND
int
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Version: 3.0
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analog
EL3681