Electrical installation – Lenze ECSCExxx User Manual
Page 104
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Electrical installation
Wiring of system bus (CAN)
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104
EDKCSCE040 DE/EN/FR 3.0
Example: Selection help
Specifications
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Cable cross−section:
0.5 mm
2
(according to cable specifications
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Number of nodes:
63
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Repeater:
Lenze−repeater, type EMF2176IB (cable reduction: 30 m)
For the max. number of nodes (63), the following cable lengths / number of
repeaters from the specifications must be observed:
Baud rate [kbit/s]
50
120
250
500
1000
Max. cable length [m]
1500
630
290
120
25
Segment cable length [m]
310
310
290
120
25
Number of repeaters
5
2
−
−
−
Check repeater application
Given:
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Baud rate:
125 kbps
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Cable cross−section:
0.5 mm
2
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Number of nodes:
28
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Cable length:
450 m
Procedure
Cable length
See
1. Total cable length at 125 kbps:
630 m
2. Segment cable length for 28 bus nodes and a cable
cross−section of 0.5 mm
2
:
360 m
3. Comparison: The value under point 2 is smaller than the required cable length of 450 m.
Conclusion
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It is not possible to use a cable length of 450 m without using a repeater.
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After 360 m (point 2) a repeater must be installed.