Recommended maximum cable length: 300 ft (91 m) with CAT6 or 500 ft (152 m) if two wire pairs are used for
GND and VIN (power).
For shielded wiring: Connect one side of the drain wire (the shield around the wires) to the GND terminal on the
ACU. Both the shield and the GND wire can share the same GND terminal. Do not connect the other side of the
shield to anything.
For standard reader installation:We recommend that you install a 1-Gang 20 CU box in order to flush-mount
the reader. Alternatively, the reader may also be surface mountedwith the included back plate.
Note: For elevators, all relays and readers must be connected to the same ACU. If you need more than four
access controlled floors or readers, add the 16 I/O Elevator Board.
Warning: Always remove power from the ACU and locking hardware when wiring Avigilon readers and
other devices. Failure to do so can damage the ACU.
Installation 25
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