Trane Tracker Version 12, Установка оборудования

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Wire the UCMs
BMTK-SVN01D-EN 31
®
Table 8. Specifications for Echelon Level 4 compliant cables
Specification Value
dc resistance
(Maximum resistance of a single
copper conductor regardless of
whether or not it is solid or
stranded and regardless of
whether or not it is metal coated.)
18.0
Ω
/1000 feet at 20°C
dc resistance unbalance (maxi-
mum) 5%
Mutual capacitance of a pair
(maximum) 17 pF/foot
Pair-to-ground unbalance (maxi-
mum) 1000 pF/foot/1000 feet
Characteristic impedance 772 kHz
102
Ω
± 15%
1.0 MHz
100
Ω
± 15%
4.0 MHz
100
Ω
± 15%
8.0 MHz
100
Ω
± 15%
10.0 MHz
100
Ω
± 15%
16.0 MHz
100
Ω
± 15%
20.0 MHz
100
Ω
± 15%
Attenuation (maximum dB/1000
feet at 20°C) 772 kHz 4.5 dB/1000 feet at 20°C
1.0 MHz 5.5 dB/1000 feet at 20°C
4.0 MHz 11.0 dB/1000 feet at 20°C
8.0 MHz 15.0 dB/1000 feet at 20°C
10.0 MHz 17.0 dB/1000 feet at 20°C
16.0 MHz 22.0 dB/1000 feet at 20°C
20.0 MHz 24.0 dB/1000 feet at 20°C
Worst-pair near-end crosstalk
(minimum)
(Values shown are for information
only. The minimum NEXT cou-
pling loss for any pair combina-
tion at room temperature is to be
greater than the value determined
using the formula NEXT
(F
MHz
)>NEXT(0.772)-15
log10
(F
MHz
/
0.72) for all frequencies in the
range of 0.772 MHz–20 MHz for a
length of 1000 feet.)
772 kHz 58 dB
1.0 MHz 56 dB
4.0 MHz 47 dB
8.0 MHz 42 dB
10.0 MHz 41 dB
16.0 MHz 38 dB
20.0 MHz 36 dB
dc resistance unbalance (maxi-
mum) 5%