Digitus Biometrics db Nexus V3.0.0 Installation Manual
db NEXUS V3.0.0
Installation Manual
Table of Contents
FCC Notice for db Nexus III ................................................................................................................................................................................... 3
Mounting the Head Unit ........................................................................................................................................................................................ 4
Mounting the Control Unit .................................................................................................................................................................................... 5
Connecting the Head Unit to the Control Unit .............................................................................................................................................. 6
Connecting the Power Source to the Control Unit ....................................................................................................................................... 7
Connecting an Electric Strike to the Control Unit ......................................................................................................................................... 8
Fail Safe Locks and Magnetic Locks (12V) ....................................................................................................................................................... 8
Fail Secure Locks (12V) ............................................................................................................................................................................................ 9
Fail Safe Locks and Magnetic Locks (24V) ....................................................................................................................................................... 9
Fail Secure Locks (24V) ......................................................................................................................................................................................... 10
Request to Exit (RTE) Switch............................................................................................................................................................................... 11
Door Sensor ............................................................................................................................................................................................................. 12
Fire Panel Integration ........................................................................................................................................................................................... 14
Wiegand Output (26-bit protocol) .................................................................................................................................................................. 17
Powering Up the Unit ........................................................................................................................................................................................... 19
Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 2 of 20
FCC Notice for db Nexus III
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Caution: Any changes or modification cautions to this device not explicitly approved by manufacturer could void your
authority to operate this equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 3 of 20
Mounting the Head Unit
Front Section
Back Section
Locate a surface adjacent to the opening side of the door, making sure that a person can stand directly in front of the
unit without obstruction. The unit should be positioned (where possible) on the wall so that the user’s forearm is
approximately 90 degrees to the wall during operation.
Prior to locating the back section of the head unit, double check that the cable passageway through the wall is
clear from obstruction (e.g. pipes, cables, etc.)
• Locate the back section of the head unit (or use the template provided in Appendix I) using a spirit level to
ensure that the plate is level.
• Inscribe the 4 screw holes and cable passageway (bottom right) with a pencil on the wall.
• Drill and plug (where necessary) the wall where the 4 mounting screws are to be fixed.
• Drill through the wall where you have marked the cable passageway, so that the cable can be passed directly
into the rear of the unit.
• Mount the back plate of the head unit to the wall using screws appropriate for the surface being fastened to.
Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 4 of 20
Mounting the Control Unit
The control unit can be placed above a false ceiling or high up out of general reach,
as no user interaction is necessary with this unit once installation is complete. Alternatively, all of the control
units can be located centrally in a communication closet.
The maximum distance between the head unit and the controller is 500 feet.
In order to make the process of mounting the control unit and connecting it to
the head unit as easy as possible, we recommend removing the 12v battery.
• Locate a suitable flat surface on the
inside of the protected door
• Ensure that the unit is level and inscribe the 4 screw holes with a pencil on the wall.
• Drill and anchor the wall (where necessary) where the 4 mounting screws are to be fixed.
• Mount the control unit to the wall using screws appropriate for the surface being fastened to.
.
Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 5 of 20
Connecting the Head Unit to the Control Unit
• Once the control unit and the back plate of the head unit are securely mounted, run a 4-pair (8 conductor) cable
between the head unit and control unit. A Belden 9504 or equivalent should be used.
• The cable should leave the control unit via one of the push-out holes located on the bottom of the unit, running
neatly along the wall and into the hole drilled through the rear of the head unit. Leave approximately 8”
(200mm) of cable spare at each end to allow for stripping the wires and connection to the terminal blocks. We
also recommend allowing an extra 12” to 18” of cable to be left as a service loop behind the surface you are
mounting to.
• The cable should be wired as shown below. The actual colors are not important but each pair of wires must be
connected as shown in the diagram.
• Wire the head unit as shown below.
To simplify the wiring the 2-part connectors can be removed from the boards.
• Strip approximately ¼” (6mm) of sheath from each cable and insert into terminal blocks, checking that all wires
are securely fastened.
• Repeat the procedure at the control unit.
Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 6 of 20
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