Specifications

High-Bandwidth RGB Matrix Switcher Crestron CEN-RGBHVHB
44 • High-Bandwidth RGB Matrix Switcher: CEN-RGBHVHB Operations Guide – DOC. 7157C
Cable Length Equation
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)
2
2
L <
40,000
R x P
Where:
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.
Add Hubs
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.
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
Crestron e-Control Reference Guide
Further Inquiries
To locate specific information or to resolve questions after reviewing this guide,
contact Crestron's True Blue Support at 1-888-CRESTRON [1-888-273-7876] or
refer to the listing of Crestron worldwide offices on the Crestron Web site
(
www.crestron.com/offices) for assistance within a particular geographic region.
To post a question about Crestron products, log onto the Online Help section of the
Crestron Web site (
www.crestron.com/onlinehelp). First-time users must establish a
user account to fully benefit from all available features.
Future Updates
As Crestron improves functions, adds new features and extends the capabilities of
the CEN-RGBHVHB, additional information may be made available as manual
updates. These updates are solely electronic and serve as intermediary supplements
prior to the release of a complete technical documentation revision.
Check the Crestron Web site periodically for manual update availability and its
relevance. Updates are identified as an “Addendum” in the Download column.