26
ASYNC/SYNC INDUSTRIAL LINE DRIVER
Appendix. Cable
Recommendations
This Line Driver was tested on twisted-pair cable with these characteristics:
Wire Gauge
Capacitance
Resistance
19 AWG (0.9 mm)
83 nF/mi. or 15.72 pF/ft.
0.0163 ohms/ft.
22 AWG (0.6 mm)
83 nF/mi. or 15.72 pF/ft.
0.0326 ohms/ft.
24 AWG (0.5 mm)
83 nF/mi. or 15.72 pF/ft.
0.05165 ohms/ft.
26 AWG (0.4 mm)
83 nF/mi. or 15.72 pF/ft.
0.08235 ohms/ft.
The Line Driver should operate on lines with specifications different from those
tested, but to reduce the potential difficulties in the field, make sure that the cable
being used has similar or better characteristics (lower capacitance or lower
resistance).
Table A-1. Distance in miles (km)
Data Rate
Wire Gauge (AWG/mm)
(kbps)
22 (0.6 mm)
24 (0.5 mm)
26 (0.4 mm)
1.2
11.9 (19.2)
9.8 (15.8)
7.2 (11.6)
1.8
11.6 (18.6)
8.7 (14)
7 (11.3)
2.4
11.1 (18)
8 (12.8)
6.6 (10.7)
3.6
10.4 (16.8)
7.6 (12.2)
6.25 (10.1)
4.8
9.7 (15.5)
6.9 (11.1)
5.9 (9.4)
7.2
9.1 (14.6)
6.6 (10.7)
4.9 (7.9)
9.6
7.6 (12.2)
6.25 (10.1)
4.5 (7.3)
14.4
7.4 (11.9)
5.2 (8.4)
4 (6.4)
16
7.2 (11.6)
5.1 (8.2)
3.8 (6.1)
19.2
6.8 (11)
4.9 (7.9)
3.6 (5.8)
28.8
6 (9.6)
3.8 (6.1)
3 (4.9)
32
5.7 (9.1)
3.6 (5.8)
2.8 (4.6)
38.4
4.7 (7.6)
3.2 (5.2)
2.2 (3.7)
57.6
3.4 (5.5)
2.7 (4.3)
1.9 (3)
64
2.5 (4)
2.3 (3.7)
1.3 (2.1)
