D
Low Voltage Cable
Specifications
Communication Bus (Automation/Safety)
Table D-1
Communication cables (Signal A and signal B)
Cable Parameter
Value
Minimum
Typical
Maxium
Cable type
Twisted and shielded
Minimum gauge
18AWG (
diameter of 1.02mm or cross sectional area of
0.82mm²)
Maximum cable length (including cable extensions)
1200 meters (4000 feet)
Certification and type
CSA,CMG FT4 type, 18AWG, 600V, 194˚F 90˚C)
UL,AWM or CM type, 18AWG, 600V, 194˚F 90˚C)
If DC power is used in the same cable use TC-ER type
(600V, 194°F (minimum 90°C))
Characteristic Impedance
73 Ω
120 Ω
140 Ω
Inductance
—
0.258 µH/ft,
Nominal
0.3 µH/ft
Mutual Capacitance
—
12 pF/ft
30 pF/ft
Velocity of propagation
66%
75%
—
Conductor DCR
—
6.9Ω/1000ft @
20°C, Nominal
8Ω/1000ft Max @
20°C
OA Shield DCR
—
1.8Ω/1000ft @
20°C, Nominal
7Ω/1000ft
Attenuation (Max dB/100ft)
0.13 @ 125 kHz
0.25 @ 500 kHz
0.36 @ 1 MHz
Pair Lay Length
—
2.50” LHL
2.75” LHL
Jacket Diameter*
—
0.414 inch
0.449 inch
* Some products are provided with strain reliefs. If the cable diameter goes over this diameter value, the strain reliefs may not
work properly.
890–00687
EDGE 2
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Страница 7: ...Chapter 1 Introduction Figure 1 2 Enclosure Identification 890 00687 EDGE 2 7...
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Страница 135: ...F Extending a cable Best practice using a junction box 890 00687 EDGE 2 135...
Страница 136: ...Appendix F Extending a cable Using of heat shrink tubing 136 890 00687 EDGE 2...