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Installation
Wiring Guidelines
The interface requires a 12 VDC power to operate properly. The interface uses a PSN2.8 power supply.
The Central Controller supplies power via the AXlink cable or external 12 VDC power supply. The
maximum wiring distance between the Central Controller and interface is determined by power
consumption, supplied voltage, and the wire gauge used for the cable.
Cable Types and Maximum Distances
Compatible AXlink cable types include those manufactured by Liberty Wire & Cable Inc., and cables
that comply with Category 5 or Belden 8102 standards. To determine the maximum distances, refer
toPower Distribution section on page 12.
Pre-manufactured AXlink cable
The Liberty Wire & Cable Inc. manufactures AXlink cable that contains two pairs of conductors. The
data pairs comprise 22 AWG stranded shielded twisted pair (STP) with a single drain wire, and a 12
VDC power pair of 18 AWG stranded wire. The nominal capacitance between the data conductors is
12.5 pF/ft.
Using the Liberty Wire & Cable Inc. AXlink cable, the maximum overall cable distance between the
Central Controller and all external devices for data communication is 3,000 feet with no remote power.
You can contact Liberty Wire & Cable Inc. at 4630 Forge Road, Suite A, Colorado Springs, CO
80907 or by calling (800) 530-8998.
Power Distribution
The following table lists the maximum cable lengths by electrical current and wire gauges (AWG). These
distances are based on a min. of 13.5 volts available at the Central Controller's power supply.
Maximum AXlink current and cable lengths by wire AWG
Maximum Current
Milliampere (mA)
50
100
250
500
1,000
Calculating AXlink wiring distances
All AXlink devices require a minimum of 12 VDC power to operate properly. The power can be supplied
by the Central Controller's AXlink cable (remote power configuration) or with an optional 12 VDC
power supply (local power configuration). The maximum wiring distance between the power supply and
AXlink device is determined by power consumption, supplied voltage, and the wire gauge used for the
cable. Use the three-step formula below to calculate the maximum wiring lengths allowable between the
Central Controller and external AXlink devices.
Most power supplies are factory set to 13.5 VDC. Never use a power supply that exceeds 18 VDC
for remote or local power configurations. Contact AMX for a complete list of products and their
power consumption ratings.
12
Cable length by wire AWG
18 AWG
20 AWG
22 AWG
2,347
1,485
926
1,174
743
463
469
297
185
235
149
93
117
74
46
24 AWG
584
292
117
58
29
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