Crestron electronic TPS-IMPC - Manual (Page 12)

Interface Module Crestron TPS-IMPC
must be taken into consideration. If network units are to be daisy-chained
on the run, the power factor of each network unit to be daisy-chained
must be added together to determine the power factor of the entire chain.
The length of the run in feet and the power factor of the run should be
used in the following resistance equation to calculate the value on the
right side of the equation.
Resistance Equation
R = Resistance (refer to table below).
L = Length of run (or chain) in feet.
PF = Power factor of entire run (or chain).
R < L x PF
40,000
Where:
The required wire gauge should be chosen such that the resistance value
is less than the value calculated in the resistance equation. Refer to the
following table.
Wire Gauge Values
RESISTANCE (R) WIRE GAUGE
4 16
6 18
10 20
15 22
13 Doubled CAT5
8.7 Tripled CAT5
NOTE: When daisy-chaining Cresnet units, strip the ends of the wires
carefully to avoid nicking the conductors. Twist together the ends of the
wires that share a pin on the network connector, and tin the twisted
connection. Apply solder only to the ends of the twisted wires. Avoid
tinning too far up the wires or the end becomes brittle. Insert the tinned
connection into the Cresnet connector and tighten the retaining screw.
Repeat the procedure for the other three conductors.
Hardware Hookup
The TPS-IMPC serves as an interface between the touchpanel and the
Cresnet system. Refer to the illustration after this paragraph for proper
connections; apply power last. When making network connections to a
control system or Cresnet peripherals, refer to “Network Wiring” on page
7. It is not necessary to make connections to a video source unless a
TPS-3000 touchpanel is used or a TPS-VID-1/2 has been installed into a
8 • Interface Module: TPS-IMPC Operations Guide - DOC. 6162