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Crestron TPMC-12L
Strip and Tin Wire
Add Hubs
Operations Guide – DOC. 6686C
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).
NOTE: All Crestron certified Cresnet wiring must consist of two twisted pairs. One
twisted pair is the +24V conductor and the GND conductor and the other twisted
pair is the Y conductor and the Z conductor.
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.
Use of a Cresnet Hub/Repeater (CNXHUB) is advised whenever the number of
Cresnet devices on a network exceeds 20 or when the combined total length of
Cresnet cable exceeds 3000 feet (914 meters).
Reference Documents
The latest version of all documents mentioned within the guide can be obtained from
the Crestron Web site (www.crestron.com/manuals).
List of Related Reference Documents
DOCUMENT TITLE
2-Series Control Systems Reference Guide
BB-12L Back Box Kit
CAT5 Wiring Reference Guide
Crestron e-Control Reference Guide
MediaManager Applications Guide
MMK-12L and WMKM-12L Mud Ring Mount Kit
PMK-12L Pre-Construction Mount Kit
QM-TX QuickMedia Transmitter
RMK-12L Rack Mount Kit
TMK-12L and WMKT-12L Trim Ring Mount Kit
TPMC-CH-IMC Interface Module
®
Isys
12" Wall Mount Touch Screen
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)
®
12" Wall Mount Touch Screen: TPMC-12L • 61
Isys
2
2
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