Crestron electronic 2-Series Control Processor Manual De Usuario

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.  

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. 

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. 

•  11