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*:
- NXT-3R up to 4 inches (10 cm)
- NXT-5R up to 6 inches (15.24 cm)
- NXT-1R up to 5 inches (12.7 cm)
- +10 to 14 VDC @ 120 mA (maximum current draw at 12 VDC)
Current Draw:
- 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 |
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.
Notes: - 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.
- 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.
- 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.