Crestron
CNRACKX
CNX Card Cage System
Operations Guide - DOC. 8133
CNX Card Cage System: CNRACKX
••
9
Wire Gauge Values
RESISTANCE (R)
WIRE GAUGE
4
16
6
18
10
20
15
22
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:
When daisy chaining network units, always twist the ends of the incoming
wire and outgoing wire which share a pin on the network connector. After twisting
the ends, tin the twisted connection with solder. Apply solder only to the ends of the
twisted wires. Avoid tinning too far up or the tinned end becomes brittle and breaks.
After tinning the twisted ends, insert the tinned connection into the network
connector and tighten the retaining screw. Repeat the procedure for the other three
network conductors.
Preparation for Use
Refer to the hookup diagram on the next page. Aside from attaching power last,
complete the connections in any order. The serial cable to the PC may be attached to
the DB9 connector of the CNXCPU or to the DB9 connector on the CNRACKX
front panel.
CAUTION:
To prevent overheating, do not operate this product in an area that
exceeds the recommended ambient temperature of 104
°
F (40
°
C). Consideration must
be given if installed in a closed or multi-unit rack assembly since the operating
ambient temperature of the rack environment may be greater than the room ambient.
Contact with thermal insulating materials should be avoided on all sides of the unit.
CAUTION:
Care must be given to connecting units to the supply circuit so that
wiring is not overloaded. The ratings on the supply input should be considered in this
concern.
NOTE:
Refer to the latest revision of the Cresnet Network Interconnect Drawing
(Doc. 5411) or Crestron Network Modular Cable Requirements (Doc. 5682) when
making connections to the port labeled CRESNET.
NOTE:
Since the plug on the power supply cord is used to disconnect power from
the unit, the socket-outlet shall be installed near the equipment and shall be easily
accessible.