NXT 2D/4D Controller Specifications

NXT 2D/4D Controller Specifications


Size (Enclosure):
13.125” H x 10.625” W x 3.06” D
(33.34 cm x 26.99 cm x 7.77 cm)

Size (PC Board):
5.6” H x 6.6” W x 2.55” D
(14.28 cm x 16.83 cm x 2.55 cm)

Weight (In Enclosure):
4.95 Lbs (2.25 Kgs)

Input Voltage:
+ 12 VDC nom. (10 - 14 VDC)

Current Draw:
570 mA typical

Inputs (4, reassignable):
  1. Door Contact Switch (2)
  2. Request to Exit (2)
  3. Expandable up to 12 Inputs
Outputs (2, reassignable):
  1. 1.0 amp (24 VDC max.) dry circuit
    Expandable up to 10 Outputs

Reader Capacity:
  1. 4 with NXT Readers *
    2 with Wiegand or MS Readers
    * 4 Reader capacity requires the
    Mercury Firmware option and
    NXT Readers

Buffer Capacity:
  1. 48,000 Cardholders
  2. 10,000 Events

Temperature / Humidity:
  1. -40° F to 140° F
  2. (-40° C to 60° C)
  3. 0-90% Non Condensing

Communication:
  1. To Server: TCP/IP 10/100 bus
    Between Controllers: TCP/IP
    10/100 bus

Lithium Battery:
  1. 5 years Memory Retention

RS-485 Cable Requirements


Connection


Run Length


Purpose


Conductors


Shielded


Stranded


Twisted Pair


AWG


RS-485 from NXT controller to NXT 4x4 (with or without an NXT 1R/3R/5R reader)



Up to 500 feet (150 meters)


Power



2


N


Y


N


18

Data

2
Y
Y
Y
22 or 24


RS-485 from NXT controller to NXT 1R/3R/5R readers


Up to 1,000 feet (300 meters)



Power


2


N


Y


N


18

Data

2
Y
Y
Y
22 or 24


Controller Power, Inputs, and Outputs Cable Requirements

Connection
Total Run Length
# of Conductors
Shielded
Stranded
AWG
Controller Power
250 feet [a]
2
N
Y
18
Earth Ground
Shortest path [b]
1
N
N
18
Inputs and Outputs [C]
500 feet
2
N
Y
22
  1. To meet CE and C-tick regulations, the length of the controller power line can be no longer than 3 Meters (9.85 feet).
  2. Use the shortest possible path from earth ground point to PCB. Connect the earth ground only to the designated pin on the terminal block. This is important as all transient protection for the unit is made through this earth ground connection. For unit protection, the earth ground connection should always be made first.
  3. Values listed are minimums. Individual input and output devices may have more specific requirements.
Note: The Lock Output relay may require a heavier gauge of wire depending upon the current demands of the lock and the length of the lock wiring run.