Wiring
AY-U920BT-US Installation and User Manual 13
4. Trim and insulate the ends of all unused conductors individually. Do not
short any unused wires together.
• The individual wires from the reader are color coded according the Wiegand
standard.
• When using a separate power supply for the reader, this supply and that of
the controller must have a common ground.
• The reader’s cable shield wire should be preferably attached to an earth
ground, or a signal ground connection at the panel, or the power supply end
of the cable. This configuration is best for shielding the reader cable from
external interference.
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