Lenze E82ZAFCC010 Instructions De Montage page 50

6 Electrical installation
Bus cable length
Test sequence
1. Total cable length at 125 kbps:
2. Segment cable length for 28 nodes and a cable cross−section
2
of 0.5 mm :
3. Comparison: The value under item 2 is smaller than the required cable length of 450 m.
Conclusion
l
It is not possible to use a cable length of 450 m without a repeater.
l
After 360 m (item 2.), a repeater must be installed.
Result
l
The Lenze repeater type 2176 is used (cable reduction: 30 m)
l
Calculation of the maximum cable length:
First segment: 360 m
Second segment: 360 m (according to Tab. 1) minus 30 m (cable reduction when a repeater is
used)
à Maximum possible cable length with repeater: 690 m.
à Thus it is possible to use the required cable length.
)
Note!
The use of another repeater is recommended as
Service interface
ƒ
Advantage: Trouble−free connection during running bus operation is
possible.
Calibration interface
ƒ
Advantage: calibration/programming unit remains electrically isolated.
50
l
Cable length See
590 m From Tab. 1
360 m From Tab. 2
EDK82ZAFCC−010 DE/EN/FR 6.0