APPENDIX: Maximum Distances
Appendix: Maximum Distances
The maximum distance that a pair of line drivers can communicate across will vary depending on the data rate and the thickness (gauge) of the wires. In multipoint applications, it will also vary depending on the number of slaves on the line. Approximate maximum distances for different combinations of these factors are listed in the tables below. Please be aware that these numbers are only approximations; the distances shown might not be attainable for all applications. Also, maximum distances will always be less than those listed when line drivers are used in noisy environments.
Table
Baud Rate |
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(kbps) | (0.8 mm) | (0.6 mm) | (0.5 mm) | (0.4 mm) | ||||
| km | miles | km | miles | km | miles | km | miles |
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256 | 3.7 | 2.3 | 2.85 | 1.8 | 2.25 | 1.4 | 1.9 | 1.2 |
192 | 6 | 3.7 | 4.5 | 2.8 | 3.5 | 2.2 | 2.7 | 1.7 |
144 | 10.6 | 6.6 | 6.75 | 4.2 | 4.5 | 2.8 | 3.4 | 2.1 |
128 | 12.4 | 7.7 | 7.3 | 4.5 | 5 | 3.1 | 3.6 | 2.2 |
115.2* | 12.8 | 8 | 7.65 | 4.8 | 5.25 | 3.3 | 3.8 | 2.4 |
112 | 12.8 | 8 | 8 | 5 | 5.5 | 3.4 | 4 | 2.5 |
96 | 13 | 8.1 | 8.3 | 5.2 | 6 | 3.7 | 4.15 | 2.6 |
72 | 15 | 9.3 | 9.4 | 5.8 | 6.25 | 3.9 | 4.3 | 2.7 |
64 | 17.6 | 10.9 | 11 | 6.8 | 7.5 | 4.7 | 5.3 | 3.3 |
57.6* | 18.8 | 11.7 | 11.75 | 7.3 | 8 | 5 | 5.6 | 3.5 |
56 | 18.8 | 11.7 | 11.75 | 7.3 | 8 | 5 | 5.6 | 3.5 |
48 | 19.4 | 12.1 | 12.2 | 7.6 | 8.25 | 5.1 | 5.8 | 3.6 |
38.4* | 20 | 12.4 | 12.5 | 7.8 | 8.5 | 5.3 | 6 | 3.7 |
32 | 20.5 | 12.7 | 12.85 | 8 | 8.75 | 5.4 | 6.2 | 3.9 |
28.8* | 20.5 | 12.7 | 12.85 | 8 | 8.75 | 5.4 | 6.2 | 3.9 |
19.2** | 23 | 14.3 | 14 | 8.7 | 9.75 | 6.1 | 7 | 4.3 |
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*Async baud rate **Sync/async baud rate
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