Wiring and Connections
33
Hardware Reference Guide - NX-Series NetLinx Integrated Controllers
INPUT PWR Connector
All NX-series controllers feature a 2-pin 3.5 mm Phoenix connector with screw retention for providing DC power to the
controller. The suggested power supply for the NX-series controllers is a 13.5 VDC 6.6 A output, suitable for 50° C.
An AC power connector is also available for the NX-4200. A 100-240VAC, 60/63Hz, 3.3A power source is required to
supply AC power to the controller.
Note: When the NX-4200 is powered only from an external 12V power supply, the ICSLAN ports will still function but
they will NOT provide PoE power to connected devices.
The NX-4200 can be connected to both mains AC and 12V DC power simultaneously. This provides redundant power
for all but PoE power on the ICSLAN ports. If the AC input power is lost or if the internal power supply fails, the
NX-4200 will immediately switch to the 12V DC power input without interruption. When AC power is restored, the
NX-4200 will switch back to the internal power supply, again without interruption.
FIG. 32 displays the power connector options for the NX-series controllers.
FIG. 32 Power connectors
Preparing Captive Wires
You will need a wire stripper and flat-blade screwdriver to prepare and connect the captive wires.
Note: Never pre-tin wires for compression-type connections.
1. Strip 0.25 inch (6.35mm) of insulation off all wires.
2. Insert each wire into the appropriate opening on the connector (according to the wiring diagrams and connector
types described in this section).
3. Tighten the screws to secure the wire in the connector. Do not tighten the screws excessively, as doing so may strip
the threads and damage the connector.
Wiring a Power Connection
To use the 2-pin 3.5mm mini-Phoenix connector with a 12 VDC-compliant power supply, the incoming PWR (+) and
GND (-) cables from the external source must be connected to their corresponding locations on the connector (FIG. 33).
FIG. 33 2-pin mini-Phoenix connector wiring diagram (direct power)
DC Power connector
(all models)
AC Power connector
(NX-4200 only)
PWR +
GND -
To the rear of the controller
Power Supply
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