Small Enclosure Size:
2.75” H x 4.25” W x 1.32” D
Full Kit Enclosure Size:
7.25” H x 6.6” W x 1.8” D
PC Board, No Enclosure Size:
2.36” H x 4.0” W x 0.78” D
Input Voltage:
+ 12 VDC nom. (9-15 VDC)
Current Draw:
NEUT Controller - 250mA
Inputs (2):
Door Contact Switch
Request to Exit
Outputs:
1.0 amp (24 VDC max.)
dry circuit
Reader Capacity:
2 (using NXT Readers)*
* NXT 3R or 5R
NXT 3RE or 5RE
Buffer Capacity:
4,000 offline
Temperature / Humidity:
-40°F to 140°F
(-40°C to 60°C)
Communication:
RS-485 (A minimum of one
Neutron Communication
Cable Kit is required per
installation.)
Lithium Battery:
5 years Memory Retention
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 Neutron 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 Neutron 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 Neutron 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 Neutron controller.
Remove power from the controller prior to connecting these devices.
USB Adapter to PC Extension Cable
A USB extension cable can be
used to extend the connection between the PC and the USB adapter - this
cable should be a maximum length of 20 feet.