Connections - SmartRelay 3 system

NOTE

notice

Fault through electromagnetic fields

Signals on the connection cable between reader and controller are influenced externally by electromagnetic fields. A shielded cable reduces the influence of disruptive signals from outside.

  1. Use a shielded cable.

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 difference is compensated. The resulting current flow can interfere with the data transfer.

  1. 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).