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AMX (UK) LTD, AMX by HARMAN - Unit C, Auster Road, Clifton Moor, York, YO30 4GD United Kingdom • +44 1904-343-100 • www.amx.com/eu/
93-5927-01 REV: B
Last Revised: 11/03/2015
The table below lists wire sizes and maximum lengths allowable between the AXB-
DMX512 and Central Controller. The maximum wiring lengths for using AxLink power
are based on a minimum of 13.5 volts available at the Central Controller’s power supply.
Using AxLink communication
Connect the AxLink wiring to the connector on the AXB-DMX512, as shown in FIG. 5.
DMX512 data communication
Note: Some DMX devices only use DATA+ and DATA-. Connect these to DATA1+ and
DATA1-, leaving DATA2+ and DATA- unconnected. The DATA2 In and Out ports are not
currently supported.
Transmit Wiring
For transmit wiring, connect the DMX512 wiring to the OUT connector, as shown in
Receive Wiring
For receive wiring, connect the DMX512 wiring to the IN connector, as shown in FIG. 7.
Mounting the AXB-DMX512 in a Rack
To mount the AXB-DMX512 in an equipment rack, you will need an AC-RK rack
mounting kit.
1.
Remove the two screws on the front panel of the AXB-DMX512.
2.
Remove the front panel and the space bracket behind the panel.
3.
Remove the rubber feet on the bottom of the unit, if necessary. Insert a scissors
blade or other sharp object into the side of one of the rubber feet and pull it off.
Do the same to remove the other three rubber feet.
4.
Place the unit in the appropriate opening in the AC-RK.
5.
Place the front panel of the AXB-DMX512 on the front of the rack over the unit
and secure the screws.
Replacing the Lithium Battery
A lithium battery (FIG. 8) with a life of approximately 5 years, protects stored presets if a
power loss occurs. The battery is not used when DC power is supplied to the AXB-
DMX512. Write down the replacement date on a sticker or label by adding 5 years to the
date of installation, and then attach it to the bottom of the AXB-DMX512.
Note: All control commands in AXB-DMX512 memory are lost when the lithium battery is
replaced
Contact your AMX dealer before you replace the lithium battery and verify that they
have a current copy of the Axcess program for your AXB-DMX512. This will avoid any
inadvertent loss of data or a service outage.
You will need a flat-blade tool (non-conducting) that can be slipped under the lithium
battery to pry it up and out of the socket.
Note: Static electricity can damage electronic circuitry. Before removing the lithium
battery from the enclosure, discharge any accumulated static electricity from your body
by touching a grounded metal object.
1.
Discharge the static electricity from your body.
2.
Unplug all cables from the AXB-DMX512.
3.
Remove the AC-RK and AXB-DMX512 from the mounting rack. Otherwise, go to
step 4.
4.
Remove the five pan-head screws on the top of the AXB-DMX512 enclosure.
5.
Pull the two enclosure halves apart and set the bottom portion of the enclosure
on a flat surface.
6.
Locate the battery on the circuit card.
7.
Carefully pry the battery out of its socket and insert the new battery. Write down
the next replacement date on a sticker or label by adding 5 years to the
replacement date, and then attach it to the bottom of the AXB-DMX512.
8.
Plug all cables back into the AXB-DMX512.
9.
Place the top portion of the enclosure back onto the bottom portion. Then,
refasten the five pan-head screws.
10. Reconnect the cables removed for battery replacement.
Note: There is a danger of explosion if you replace the battery incorrectly. Replace the
battery with the same or equivalent type recommended by the manufacturer. Dispose of
used battery according to the manufacturer's instructions. Never recharge, disassemble,
or heat the battery above 212 °F (100 °C). Never solder directly to the battery or expose
the contents of the battery to water.
WIRING GUIDELINES AT 160 MA
Wire Size
Maximum Wiring Length
18 AWG
733.57 feet (223.59 m)
20 AWG
464.11 feet (141.46 m)
22 AWG
289.35 feet (88.19 m)
24 AWG
182.39 feet (55.59 m)
FIG. 5
AXLINK WIRING
FIG. 6
DMX512 TRANSMIT WIRING
FIG. 7
DMX512 RECEIVE WIRING
PWR
AXP
AXM
GND
PWR
AXP
AXM
GND
Device
AxLink connector
on AXB-DMX512
DMX 512 OUT
connector on AXB-DMX512
GND
DATA1-
DATA1+
DATA2-
DATA2+
NC
GND
DATA1-
DATA1+
DATA2-
DATA2+
Device
DMX 512 IN
connector on AXB-DMX512
GND
DATA1-
DATA1+
DATA2-
DATA2+
NC
GND
DATA1-
DATA1+
DATA2-
DATA2+
Device
FIG. 8
LITHIUM BATTERY AND SOCKET
Battery (CR2032 type - 20mm coin cell)
socket
