Crestron CP2/CP2E 2-Series Integrated Control Processor
5. Secure the wires connected to the terminal block with a tie wrap around
the bussing strip to provide strain relief.

Network Wiring

NOTE: When making wire connections, refer to the latest revision of the Cresnet
Network Interconnect Drawing (Doc. 5411). The document can be obtained from the
Downloads section of the Crestron website (www. crestron.com). Search for the
CRESNET.PDF files.
CAUTION: Exceeding the power output (maximum 24W) of the CP2/CP2E can
result in system shutdown or a blown fuse.
CAUTION: Possible equipment damage if miswired.
NOTE: The orientation of this connector is “upside down” compared to other
Crestron network devices (e.g., CNX-BIPAD8, CNX-RMCLV). Be sure the mating
Cresnet cable connector is properly aligned before attempting to insert it, to avoid
damage to the CP2/CP2E unit.
NOTE: Do not power up system until all wiring is verified. Care should be taken to
ensure data (Y, Z) and power (24, G) connections are not crossed. Data “Y” was data
“+”; data “Z” was data “-”.
NOTE: All network 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: For larger networks (i.e., greater than 28 network devices), it may be
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
desirable to add a hub/repeater after only 20 network devices.
When calculating the wire gauge for a particular network run, the length of the run
and the power factor of each network unit to be connected 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 chai n) in feet.
PF = Power factor of en tire run (or chai n).
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.
Operations Guide - DOC. 5980 2-Series Integrated Control Processor: CP2/CP2E• 11