Fujitsu AB* A12GATH, Design & Technical Manual

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4-3. TRANSMISSION LINE
„ „
TRANSMISSION WIRING SPECIFICATIONS
Use Size Wire type Remarks
Transmission cable
0.33mm
2
( 22AWG )
LEVEL 4 (NEMA)
non-polar 2core, twisted pair solid core
diameter 0.65mm
L
ON
W
ORKS
®
compatible cable
Use the shielded wire specified and always ground it both end.
22AWG (0.65mm) Level 4 cable with shielded (National Electrical Manufacturers Association
(NEMA) Differs from the Category 4 specification proposed by the Electronic Industries
Association / Telecommunication Industry Association (EIA/TIA)
„ z
Reference specifications for transmission cable
No. Item Unit Specifications
1
Wire type
mm
0.65dia (22AWG)
Twisted pair with shield
2 Pair (Twisted pair cable) Note 1 - 1P or 2P
3 Loop DC Resistance (20°C) Ohm/km Less than 118
4 DC Resistance Unbalancing (20°C) % Less than 5
5
Dielectric Voltage
(Between conductor to conductor)
V/min AC 350
6
Insulation Resistance (20°C)
(Between conductor to conductor)
Mohm-km
More than 500
(after charging DC500V 1min.)
7 Static Capacitance between Conductors 1KHz nF/km Less than 56
8
Unbalanced Static Capacitance
(To Ground)
1KHz nF/km Less than 3.28
9 Characteristic Impedance
772KHz
Ohm
102+ - 15% (87 to 117)
1MHz 100+ - 15% (85 to 115)
4MHz 100+ - 15% (85 to 115)
8MHz 100+ - 15% (85 to 115)
10MHz 100+ - 15% (85 to 115)
16MHz 100+ - 15% (85 to 115)
20MHz 100+ - 15% (85 to 115)
10 Attenuation
772KHz
dB/km
Less than 15
1MHz Less than 18
4MHz Less than 36
8MHz Less than 49
10MHz Less than 56
16MHz Less than 72
20MHz Less than 79
11 Cross talk attenuation (Note 2)
772KHz
dB/km
Less than 58
1MHz Less than 56
4MHz Less than 47
8MHz Less than 42
10MHz Less than 41
16MHz Less than 38
20MHz Less than 36
Note :
1 : Number of twist is not specified. However, it shall satisfy the electrical specifications such as characteristic impedance,
attenuation, etc. (Example : More than 40times/m)
2 : Cross talk attenuation is applied when the twisted cable has 2 pairs (2P)
3 : Material is not specified. However, it shall be selected by considering the operating environment (Temperature,
Humidity), and the regional regulation by the environmental condition (ROHS Directive, etc.)
4 : Mechanical specification is not specified. However, it shall be selected by considering the operating environment.
5 : Never bundle transmission cable with power supply cable.
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