NOTE
Ground loop through shielding
Physically separated devices can have a slightly different earth poten-
tial. A screen connected on both sides represents a second earth con-
nection through which this potential difference is balanced. The current
arising from this can disrupt the data transfer.
Only connect the screen on one side to the common ground poten-
tial (either on the controller or the reader - for reasons of space,
connection to the controller is recommended).
SmartRelais-3-Leser
4. Connections
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EN