2-Series Card Cage System
Crestron
RACK2
Resistance 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 table after this paragraph.
Wire Gauge Values
RESISTANCE (R)
WIRE GAUGE
4
16
6
18
10
20
15
22
13
Doubled CAT5
8.7
Tripled CAT5
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 that 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.
Hardware Hookup
Refer to the following hookup diagram. Aside from connecting power last, complete
the connections in any order. The serial cable to the PC may be attached to the DB9
connector of CPU2 on the rear panel or to the DB9 connector on the RACK2 front
panel. Use the front panel or rear panel connector for setup and programming.
CAUTION:
To prevent overheating, do not operate this product in an area that
exceeds the recommended ambient temperature of 113°F (45°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.
NOTE:
The maximum continuous current from equipment under any external load
conditions shall not exceed a current limit that is suitable for the minimum wire
gauge used in interconnecting cables. The ratings on the connecting unit's supply
input should be considered to prevent overloading the wiring.
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2-Series Card Cage System: RACK2
Operations Guide – DOC. 5958
Содержание RACK2
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