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):
- Door Contact Switch (2)
- Request to Exit (2)
- Expandable up to 12 Inputs
Outputs (2, reassignable):
- 1.0 amp (24 VDC max.) dry circuit
Expandable up to 10 Outputs
Reader Capacity:
- 4 with NXT Readers *
2 with Wiegand or MS Readers
* 4 Reader capacity requires the
Mercury Firmware option and
NXT Readers
Buffer Capacity:
- 48,000 Cardholders
- 10,000 Events
Temperature / Humidity:
- -40° F to 140° F
- (-40° C to 60° C)
- 0-90% Non Condensing
Communication:
- To Server: TCP/IP 10/100 bus
Between Controllers: TCP/IP
10/100 bus
Lithium Battery:
- 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
|
- To meet CE and C-tick regulations, the length of the controller power line can be no longer than
3 Meters (9.85 feet).
- 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.
- 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.
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