Lenze EMF2180IB EthernetCAN - Manual (Page 49)

Electrical installation
Connection of system bus (CAN)
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EDKMF2180 DE/EN/FR/ES/IT 3.0
49
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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.