Lenze E82ZAFCC010 - Manual (Page 51)

Electrical installation
Bus cable length
6
EDK82ZAFCC-010 DE/EN/FR 5.0
51
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H2 BusLeitgsLaenge-Leitungslaenge_3
Test sequence Cable length See
1. Total cable length at 125 kbps: 590 m From Tab. 1
2. Segment cable length for 28 nodes and a cable cross-section
of 0.5 mm 2 :
360 m From Tab. 2
3. Comparison: The value under item 2 is smaller than the required cable length of 450 m.
Conclusion
It is not possible to use a cable length of 450 m without a repeater.
After 360 m (item 2.), a repeater must be installed.
Result
The Lenze repeater type 2176 is used (cable reduction: 30 m)
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)
Maximum possible cable length with repeater: 690 m.
Thus it is possible to use the required cable length.
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Note!
The use of another repeater is recommended as
ƒ Service interface
Advantage: Trouble-free connection during running bus operation is
possible.
ƒ Calibration interface
Advantage: calibration/programming unit remains electrically isolated.