Installation Guide
NXB-KNX NetLinx KNX Interface
Overview
The NetLinx NXB-KNX (FG2031-01) allows AMX NetLinx Integrated Controllers
the ability to control, integrate and communicate with homes and buildings that
utilize the KNX communication protocol.
KNX is the world’s first open, royalty free, and platform independent standard for
home and commercial building control.
Product Specifications
Wiring and Connections
Note: To avoid any damage to the electronic component, installation must be
performed in an ESD safe environment.
Note: Do not connect power to the NXB-KNX until the wiring is complete.
The NXB-KNX is installed between the NetLinx Master and the KNX control bus,
and passes NetLinx control commands to the KNX control bus via 2-wire twisted
pair cabling, as indicated in FIG. 2:
After completing the installation, consult the Using the Configuration Manager
section of the NXB-KNX NetLinx Interface Operation/Reference Guide for
instructions on specifying IP and Security settings, via the NXB-KNX
WebConsole.
Ethernet 10/100 Base-T RJ-45 Wiring Configuration
The table below describes the pinouts, signals, and pairing for the Ethernet
10/100 Base-T connector and cable.
PoE (Power Over Ethernet)
The NXB-KNX uses CAT5/CAT6 wire via the Ethernet port for PoE power.
Use the PS-POE-AF Power over Ethernet Injector (FG423-80) to simplify wiring
and installation by eliminating the need for an AC outlet at each point of
installation.
Note: The NXB-KNX can be placed up to approximately 330’ (100 meters) from
the nearest PoE Injector.
• If used with a non PoE-capable Ethernet switch (such as the
NXA-ENET24), then an optional PS-POE-AF Power-over-Ethernet (PoE)
power supply is required to provide power to the NXB-KNX.
• If the NXB-KNX is used with a PoE-capable Ethernet switch (such as the
NXA-ENET24PoE), then no PoE Injectors are required.
KNX Connector
The KNX connector on the rear panel is a 2-pin captive-wire connector that
provides communication between the NXB-KNX and the KNX control system via
2-wire shielded twisted pair cabling (FIG. 3).
Configuration via WebConsole
NXB-KNX units have a built-in WebConsole that allows you to make various
configuration settings via a web browser on any PC that has access to the
Master.
FIG. 1 NXB-KNX
NXB-KNX Specifications
Front Panel
Components:
• Status LED (green): Blinks to indicate that the unit is
communicating with the NetLinx Master. Any state other than
blinking indicates the unit has not completed boot up.
• KNX LED (green): Solid on indicates power is on and the unit is
connected to the KNX bus.
• Output LED (red): Lights to indicate traffic from the NXB-KNX to
the KNX bus.
• Input LED (yellow): Lights to indicate traffic from the KNX bus to
the NXB-KNX.
Rear Panel
Connectors:
• KNX 2-pin captive-wire connector:
• Ethernet Port - 10/100 Ethernet with PoE. LEDs show
communication activity, connection status, speeds, and mode
information:
SPD (speed) - Yellow LED lights On when the connection speed
is 100 Mbps and turns Off when the speed is 10 Mbps.
L/A (link/activity) - Green LED lights On when the Ethernet cables
are connected and terminated correctly, and blinks when
receiving Ethernet data packets.
Power
Requirements:
• PoE powered – no local Power Supply needed
• IEEE 802.3af Compliant
Memory: • 64 Mbytes of RAM
• 256 Mbytes of FLASH
Dimensions
(HWD):
With feet:
• 1.66" x 5.54" x 4.10"
• 4.216 cm x 14.07 cm x 10.42 cm
Without feet:
• 1.52" x 5.54" x 4.10"
• 3.861 cm x 14.07 cm x 10.42 cm
Weight: 1.45 lbs. (0.65 kg)
Operating
Environment:
• Operating Temperature: 32°F - 104°F (0°C - 40°C)
• Relative Humidity: 5% to 85% non-condensing
• Intended for indoor use only
Included
Accessories:
• Rubber feet
• Green 2-Pin 5mm Phoenix connector with captive screws
Other AMX
Equipment:
• AC-DIN-CS3 DIN Rail Mounting Bracket (FG532-01)
• PS-POE-AF PoE Injector (FG423-80)
Certifications: • FCC Class B
•CE
• IEC60950
•RoHS
(front)
(rear)
FIG. 2 NXB-KNX installation
Ethernet Pinouts and Signals
Pin Signals Connections Pairing Color
1 TX + 1 --------- 1 1 --------- 2 White-Orange
2 TX - 2 --------- 2 Orange
3 RX + 3 --------- 3 3 --------- 6 White-Green
4 no connection 4 --------- 4 Blue
5 no connection 5 --------- 5 White-Blue
6 RX - 6 --------- 6 Green
7 no connection 7 --------- 7 White-Brown
8 no connection 8 --------- 8 Brown
FIG. 3
KNX Connector wiring diagram
KNX
Control
Bus
NXB-KNXNetLinx Master
Ethernet 10/100 2-wire twisted pair
PoE injector
KNX
Control
Bus
2-wire twisted pair
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