AMX Control System Accessories Anterus - Manual (Page 16)

Installation
12 Anterus RFID Solution
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.
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.
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.
You can contact Liberty Wire & Cable Inc. at 4630 Forge Road, Suite A, Colorado Springs, CO
80907 or by calling (800) 530-8998.
Maximum AXlink current and cable lengths by wire AWG
Maximum Current Cable length by wire AWG
Milliampere (mA)
18 AWG 20 AWG 22 AWG 24 AWG
50 2,347 1,485 926 584
100 1,174 743 463 292
250 469 297 185 117
500 235 149 93 58
1,000 117 74 46 29
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.