Lenze ECSCExxx - Manual (Page 103)

Electrical installation
Wiring of system bus (CAN)
4
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103 EDKCSCE040 DE/EN/FR 3.0
Bus cable length
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Note!
The permissible cable lengths must be observed.
1. Check the compliance with the total cable length in Tab. 4−1.
The baud rate determines the total cable length.
CAN baud rate [kbit/s] Max. bus length [m]
50 1500
125 630
250 290
500 120
1000 25
Tab. 4−1 Total cable length
2. Check the compliance with the segment cable length in Tab. 4−2.
The segment cable length is determined by the cable cross−section used and the
number of nodes. Without a repeater, the segment cable length corresponds to
the total cable length.
Number of 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
Tab. 4−2 Segment cable length
3. Compare the two values detected.
If the value detected from Tab. 4−2 is smaller than the total cable length to be
provided from Tab. 4−1 , repeaters must be used. Repeaters divide the total cable
length into segments.