CANopen Network Interface
Tap Length |
| A tap creates a signal reflection and thus its length must be limited to the following | ||||
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| Lmax is the maximum length of a tap. |
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| ΣLImax is the maximum value of the sum of all taps on the same tap junction box. | ||||
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| Min interval is the minimum distance necessary between two taps. | ||||
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| ΣLGmaxis the maximum value of the sum of all taps on the segment. | ||||
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| The values to use are given in the following table: |
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Speed | Lmax | ΣLImax | Min. interval | ΣLGmax |
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| 0.6xΣL local |
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1 Mbits/s | 0.3 m (0.98 ft) | 0.6 m (1.96 ft) |
| 1.5 m (4.9 ft) |
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800 Kbits/s | 3 m (9.8 ft) | 6 m (19.6 ft) | 3.6 m (11.8 ft)(*) | 15 m (49 ft) |
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500 Kbits/s | 5 m (16.4 ft) | 10 m (32.80 ft) | 6 m (19.6 ft)(*) | 30 m (98.4 ft) |
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250 Kbits/s | 5 m (16.4 ft) | 10 m (32.80 ft) | 6 m (19.6 ft)(*) | 60 m (196.8 ft) |
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125 Kbits/s | 5 m (16.4 ft) | 10 m (32.80 ft) | 6 m (19.6 ft)(*) | 120 m (393.6 ft) |
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50 Kbits/s | 60 m (196.8 ft) | 120 m (393.6 ft) | 72 m (236 ft)(*) | 300 m (984 ft) |
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20 Kbits/s | 150 m (492 ft) | 300 m (984 ft) | 180 m (590.5 ft)(*) | 750 m (2 460.6 ft) |
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10 Kbits/s | 300 m (984 ft) | 600 m (1 968.4 ft) | 360 m (1 181 ft)(*) | 1 500 m (4 921 ft) |
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Legend: |
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(*) The minimum cable length between two consecutive tap junction boxes must be greater than 60% of the largest |
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of the two sums of the lengths of taps on each of the two boxes. |
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40 | 1606218 02 08/2006 |
