Lenze 8400 - Manual (Page 218)

Electrical installation
Common control terminals
System bus connection (CANopen)
6

218 EDS84ASC552 EN 9.1
Test steps Cable length See
1. Total cable length at 125 kbps: 600 m From Tab. 6-1
2. Segment cable length for 28 nodes and a cable cross-section of
0.5 mm 2 :
360 m From Tab. 6-2
3. Comparison: The value in point 2 is lower than the cable length of 450 m which must be implemented.
Result
ƒ Use of repeaters
– Without the use of repeaters, a cable length of 450 m cannot be implemented.
After 360 m (point 2), a repeater must be used.
– The Lenze repeater, type 2176 is used (cable reduction: 30 m).
ƒ Calculation of the max. cable length:
– First segment: 360 m
– Second segment: 360 m (acc. to Tab. 6-1)
minus
30 m (cable reduction if a repeater
is used)
– Max. cable length that can be implemented if a repeater is used: 690 m.
Hence, the selected cable length can be implemented.