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Installation and Wiring
19
VTM-D15/A 15" MultiMedia Touch Panel Systems
3. Tighten the screws to secure the wire in the connector. Do not tighten the screws excessively;
doing so may strip the threads and damage the connector.
Wiring guidelines
The AXB-TPI/3 requires 12 VDC power to operate properly. Each module adds 500 mA of current
consumption (in addition to the baseline 630 mA for a stand-alone unit) on the TPI/3 system. The
unit should only have one source of incoming power.
Using the AXlink connector for data and power
To use the AXlink 4-pin connector for data communication with the Central Controller and power
transfer from the PSN6.5 power supply, the incoming PWR and GND cable from the PSN6.5 must
be connected to the AXlink cable connector going to the Central Controller. FIG. 18 shows the
AXlink wiring diagram. Always use a local power supply to power the TPI/3 unit.
Wiring Guidelines - No Module Wiring Guidelines - One Module
Wire size Maximum wiring length Wire size Maximum wiring length
18 AWG 186.30 feet (56.78 meters) 18 AWG 103.87 feet (31.66 meters)
20 AWG 117.87 feet (35.93 meters) 20 AWG 65.72 feet (20.03 meters)
22 AWG 73.49 feet (22.40 meters) 22 AWG 40.97 feet (12.49 meters)
24 AWG 46.32 feet (14.12 meters) 24 AWG 25.83 feet (7.87 meters)
Wiring Guidelines - Two Modules Wiring Guidelines - Three Modules
Wire size Maximum wiring length Wire size Maximum wiring length
18 AWG 72.01 feet (21.95 meters) 18 AWG 55.10 feet (16.79 meters)
20 AWG 45.56 feet (13.89 meters) 20 AWG 34.86 feet (10.63 meters)
22 AWG 28.40 feet (8.66 meters) 22 AWG 21.74 feet (6.63 meters)
24 AWG 17.90 feet (5.46 meters) 24 AWG 13.70 feet (4.18 meters)
Using more than one source of power to the AXB-TPI/3 can result in damage to the
internal components and a possible burn out.
FIG. 18 AXlink connector wiring diagram
PWR (+)
GND (-)
Local +12 VDC power supply
(coming from the PSN power supply)
PWR +
AXP/TX
AXM/RX
GND -
PWR +
AXP/TX
AXM/RX
GND -
To the Central Controller
To the AXB-TPI/3
Do not connect the wire from the PWR terminal on the Central Controller to the PWR
terminal on the TPI/3 unit when you connect an external power supply. Make sure to
connect only the AXM, AXP, and GND wires on the TPI/3’s AXlink connector when
using the PSN6.5 power supply.