4. Connections
Ground loop through shielding
Remote devices may have a slightly different ground potential. A shield connected on
both sides represents a second ground connection through which this potential differ-
ence is compensated. The resulting current flow can interfere with the data transfer.
Only connect the screen on one side to the common ground potential, e.g. on the
reader (WP variant: Shield is led out on reader side together with ground).
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SmartRelay 3 reader
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