Keri NXT Reader Specifications

Keri NXT Reader Specifications

Specifications:

Size:

• NXT-3R Euro Mount Prox Reader - 3.25 inches tall by 3.25 inches wide by 0.5625 inches deep
- 8.25 cm by 8.25 cm by 1.43 cm (not including wiring connectors)

• NXT-5R Mullion Reader - 3.75 inches tall by 1.625 inches wide by 0.50 inches deep
- 9.52 cm by 4.13 cm by 1.27 cm 
(not including wiring connectors)

• NXT-1R Wall Switch Reader - 4.50 inches tall by 3.00 inches wide by 0.625 inches deep
- 11.43 cm by 7.62 cm by 1.59 cm 
(not including wiring connectors)

Weight:

• NXT-3R - 2.1 oz. (59g) 

• NXT-5R - 3.2 oz. (90g) 

• NXT-1R - 1.3 lbs. (582g) 

Read Range*:

  1. NXT-3R up to 4 inches (10 cm)
  2. NXT-5R up to 6 inches (15.24 cm)
  3. NXT-1R up to 5 inches (12.7 cm)

Input Voltage:

  1. +10 to 14 VDC @ 120 mA (maximum current draw at 12 VDC) 

Current Draw:

  1.  120 mA (maximum current draw at 12 VDC).

Operating Temperature:

-40°F to 150°F (-40°C to 65°C) – 0% to 90% Relative Humidity, non-condensing.


RS-485 Cable Requirements

RS-485 bus runs can daisy-chain together an NXT-4x4 and NXT-Reader on one line. The total cable run distance should be no more than 500 feet from the NXT controller for runs with 4x4s and no more than 1,000 feet for Reader-only runs.


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.

Notes: 
  1. 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.
  2. Cable resistance causes a drop in voltage at the end of long cable runs. Ensure the appropriate power and current for your device is available at the device at the end of the cable run. Heavier gauge cable reduces this effect.
  3. Keri does not recommend hot-plugging a Reader, RIM, or 4x4 into an NXT controller. Remove power from the controller prior to connecting these devices.

LED Indicator:

Tri-Color Standard (Red, Green, Amber).

Audio Tone:

Standard Frequency: 125 KHz excitation, 62.5 KHz data return.

Warranty:

Lifetime warranty against defects in materials and workmanship. * Read range is stated in a clean RF and electrical environment with KC-10X card presented parallel to reader surface.

Note: Specifications subject to change without notice. Trademarks are the property of their respective owners.

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