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Crestron QM-FTMC
QM Network Topology
Operations & Installation Guide – DOC. 6311A
Make sure the cable length value is less than the value calculated on the right
side of the equation. For example, a Cresnet run drawing 20 watts should not
have a length of run more than 333 feet.
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.
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.
NOTE: For larger networks (i.e., greater than 28 network devices), it may
become necessary to add a Cresnet Hub/Repeater (CNXHUB) to maintain signal
quality throughout the network. Also, for networks with lengthy cable runs, it
may be necessary to add a Hub/Repeater after only 20 devices.
QM Network Wiring
When connecting multiple QM devices, the route between a QM origination
point (e.g., QM-FTMC) and a QM endpoint (e.g., QM-RMCRX-BA) cannot
have more than two midpoints (e.g., QM-MD7x2 or other QM switchers). Refer
to the following diagram when configuring a QM network. Refer to Appendix B
on page 57 for additional QuickMedia installation information.
Crestron Toolbox
The Crestron Toolbox (replacement for Crestron Viewport, you may continue to
use Viewport if desired) is a broad-based software package that accomplishes
multiple system tasks, primarily using an RS-232 or TCP/IP connection between
a PC and one or more Crestron control systems.
You can use the Crestron Toolbox to:
Observe system processes.
•
Upload operating systems and firmware.
•
Upload programs and touchpanel projects.
•
Set or change device Network IDs.
•
FlipTop Media Center
FlipTop Media Center: QM-FTMC • 15
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