Crestron CNXCPU Operations & Installation Manual page 6

CNX Control Processor Card
2 CNX Control Processor Card: CNXCPU
CNXCPU Ports
The CNXCPU contains a COMPUTER port, two CRESNET connectors, and a DPA
slot. When the optional Ethernet Expansion Card is installed, the LAN/DPA port on
the faceplate is available. The ports are described below:
COMPUTER
Computer Port
This 9-pin DB9 female RS-232 connector is used when programming the CNXCPU
with a PC. A standard DB9 male (attached to the CNXCPU) to DB9 female
(attached to the PC) straight-through serial cable (not supplied) is used to
communicate with the port. Additionally, there is a DB9 female connector on the
front panel of the control system and both ports are electrically connected. The ports
are modem compatible but the null modem cable is not included.
CRESNET
Cresnet 4-Wire and 6-Pin Connectors
24
Y
C
Z
R
E
G
S
N
E
T
This 4-wire male connector (typical Crestron network port labeled 24 Y Z G) is used
to provide 24VDC power via an external power supply that is sold separately.
Crestron recommends specific power supplies for its network devices. The
recommended power supply for the CNXCPU is Crestron part number CNPWS-75
and for international configurations, part number CNPWSI-75.
The 6-pin RJ-type modular connector is used for expansion to (or from) SmarTouch
and Cresnet peripherals.
NOTE: If using the modular connector, review the latest revision of the Crestron
Network Modular Cable Requirements (Doc. 5682). Most 6-conductor telephone
cables are wired in a crisscross fashion and are not compatible with Crestron
equipment.
Crestron CNXCPU
Operations & Installation Guide - DOC. 8135