Check Network Wiring - Crestron TPMC-9 Operation Manual

Crestron TPMC-9
Use the Right Wire
Calculate Power
Operations Guide – DOC. 6965E
TPMC-9 Troubleshooting (Continued)
TROUBLE POSSIBLE CAUSE(S)
Unexpected Touch screen is
response from incorrectly calibrated.
touch screen.
TPMC-9 boots up Invalid VT Pro-e project
in setup screens or no VT Pro-e project is
every time. loaded.

Check Network Wiring

To ensure optimum performance over the full range of the installation topology, use
Crestron Certified Wire only. Failure to do so may incur additional charges if
support is required to identify performance deficiencies because of using improper
wire.
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to
do so could cause equipment damage or void the Crestron warranty.
CAUTION: Provide sufficient power to the system. Insufficient power can lead to
unpredictable results or damage to the equipment. Use the Crestron Power
Calculator to help calculate how much power is needed for the system
(www.crestron.com/calculators).
When calculating the length of wire for a particular Cresnet run, the wire gauge and
the Cresnet power usage of each network unit to be connected must be taken into
consideration. Use Crestron Certified Wire only. If Cresnet units are to be daisy
chained on the run, the Cresnet power usage of each network unit to be daisy
chained must be added together to determine the Cresnet power usage of the entire
chain. If the unit is home-run from a Crestron system power supply network port, the
Cresnet power usage of that unit is the Cresnet power usage of the entire run. The
wire gauge and the Cresnet power usage of the run should be used in the following
equation to calculate the cable length value on the equation's left side.
Cable Length Equation
Where:
40,000
L <
R x P
Make sure the cable length value is less than the value calculated on the right side of
the equation. For example, a Cresnet run using 18 AWG Crestron Certified Wire and
drawing 20 watts should not have a length of run more than 333 feet (101 meters). If
Cresnet HP is used for the same run, its length could extend to 1250 feet (381
meters).
N OTE: All Crestron certified Cresnet wiring must consist of two twisted pairs.
One twisted pair is the 24 and G pair and the other twisted pair is the Y and Z pair.
L = Length of run (or chain) in feet
R = 6 Ohms (Crestron Certified Wire: 18 AWG (0.75 mm ))
or 1.6 Ohms (Cresnet HP: 12 AWG (4 mm ))
P = Cresnet power usage of entire run (or chain)
9" Tilt Touch Screen: TPMC-9 • 29
9" Tilt Touch Screen
CORRECTIVE ACTION
Recalibrate the touch screen
(refer to "Diagnostics" which
starts on page 19).
Load/reload VT Pro-e project
using the Toolbox.
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