CTI 2500-C100, Инструкция по установке и эксплуатации

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CTI 2500 Installation and Operation Guide V2.8 37
Cable Selection
The following cables (or equivalent) are acceptable for use for remote I/O connections.
Belden
Cable
Type Outside
Diameter
Impedance
Capacitance
Velocity Center
Conductor
9182 0.35 in.
8.9 mm 150 ohm 28.9 pf/m 0.78c 22 AWG 19x34
46 ohm/km
9271 0.24 in
6.1 mm 124 ohms 40 pf/m 0.66c 25 AWG 7x33
104.3 ohm/km
9860 0.44 in.
11.2.mm 124 ohms 35.8 pf/m 0.78c 16 AWG Solid
13.8.ohm/km
Belden 9182 is suitable for intermediate length trunk lines. This cable cannot be intermixed with
other cables for trunk lines. In addition, if this cable is used for a trunk line, it must also be used
for all drop lines. It may also be used for drop lines with Belden 9860 or Belden 9271 trunk
lines.
Belden 9271, which is smaller and more flexible, is suitable for use as drop lines as well as
short trunk lines. For trunk lines, this cable may be intermixed with Belden 9860.
Belden 9860 cable, which provides low attenuation and distortion, should be used for long trunk
lines.
When wiring the cable connectors, refer to APPENDIX F. – PRODUCT SPECIFICATIONS for
the port pinout.
Cable Length and Termination
For each cable type, there is a maximum cable length. As the figure below indicates, the
maximum cable length is measured from the CPU to the most distant tap. Note that a
terminating resistor
must be installed on the end terminal blocks.
Remote
Base
Remote
Base
Remote
Base
TB TB TB
TB = Terminal Block
Drop Line
C
P
U
TB
Drop Line
Line
Terminating
Resisto
r
Terminating
Resisto
r