Lenze 8400 - Manual (Page 217)

Electrical installation
Common control terminals
System bus connection (CANopen)
6

217 EDS84ASC552 EN 9.1
Segment cable length
2. Check whether the segment cable length is complied with.
The segment cable length is determined by the used cable cross-section and the number
of nodes. If no repeaters are used, the segment cable length corresponds to the total cable
length.
Maximum number
of nodes per
segment
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. 6-2 Segment cable length
3. Comparison of the two determined values.
If the value determined from Tab. 6-2 is lower than the total cable length to be
implemented from Tab. 6-1, repeaters must be used. Repeaters divide the total cable
length into segments.
Example: Selection help
Selections
 Cable cross-section: 0.5 mm 2 (acc. to cable specification  214)
 Number of nodes: 63

Repeater: Lenze repeater, type 2176 (cable reduction: 30 m)
For a max. number of nodes (63), the following cable lengths / numbers of repeaters must
be complied with according to selection:
Baud rate [kbps] 10 20 50 125 250 500 800 1000
Max. cable length [m] 8075 4013 1575 600 275 113 38 13
Segment cable length [m] 270 270 270 270 270 113 38 13
Number of repeaters 30 15 6 2 1 - -
Check the use of repeaters

Note!
The use of another repeater is recommended as
ƒ Service interface
Advantage: Trouble-free connection to running bus operation is possible.
ƒ Calibration interface
Advantage: The calibration / programming unit remains electrically
isolated.
Selections
 Baud rate: 125 kbps
 Cable cross-section: 0.5 mm 2

Number of nodes: 28
 Cable length: 450 m