Lenze E84DGFCC - Manual (Page 27)

EDS84DMOTCAN EN 3.0 - 11/2011
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27
Communication manual 8400 motec CANopen
Installation
Electrical installation
Segment cable length
2. Check that the segment cable length is not exceeded
The segment cable length is determined by the number of nodes and the cable
cross-section used. Without a repeater, the segment cable length corresponds to
the total cable length.
[5-2] Segment cable length
3. Compare both values.
If the value determined from the Segment cable length [5-2] table is smaller than
the required total cable length Total cable length [5-1] , repeaters must be used.
Repeaters divide the total cable length into segments.
Selection example
Based on the given specifications, the following cable lengths/number of repeaters result
for a maximum of 63 nodes:
Maximum number of
nodes per segment
Cable cross-section
0.25 mm 2 0.5 mm 2 0.75 mm 2 1 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
Given
• Cable cross-section:
0.5 mm 2 , according to Specification of the bus cable ( 26)
• Number of nodes: 63
• Repeater: Lenze repeater, type 2176 (cable reduction: 30 m)
Baud rate [kbps] 20 50 125 250 500 800 1000
Max. cable length [m] 4013 1575 600 275 113 38 13
Segment cable length [m] 270 270 270 270 113 38 13
Number of repeaters 15 6 2 1 - - -