Electrical installation – Lenze EMF2180IB EthernetCAN User Manual
Page 49
Electrical installation
Connection of system bus (CAN)
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EDKMF2180 DE/EN/FR/ES/IT 3.0
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H1_E_INST-SteckerFederkraftAnschluss FKCT
Bus cable length
It is absolutely necessary to comply with the permissible cable lengths.
1. Check the compliance with the total cable length in Tab. 1.
The total cable length is determined by the baud rate.
Baud rate [kbit/s]
Max. bus length [m]
20
3600
50
1400
125
550
250
250
500
110
1000
20
Tab. 1
Total cable length
2. Check the compliance with the segment cable length in Tab. 2.
The segment cable length is determined by the cable cross-section used and by the number
of nodes. Without repeaters the segment cable length corresponds to the total cable length.
Nodes
Cable cross-section
0.25 mm
2
0.5 mm
2
0.75 mm
2
1.0 mm
2
2
240 m
430 m
650 m
940 m
5
230 m
420 m
640 m
920 m
10
230 m
410 m
620 m
900 m
20
210 m
390 m
580 m
850 m
32
200 m
360 m
550 m
800 m
63
170 m
310 m
470 m
690 m
100
150 m
270 m
410 m
600 m
Tab. 2
Segment cable length
3. Compare both values.
If the value given in Tab. 2 is smaller than the required total cable length from Tab. 1,
repeaters must be used. Repeaters divide the total cable length into segments.