Lenze E82ZAFCC001 - Manual (Page 50)

6 Electrical installation
Bus cable length
EDK82ZAFCC−001 DE/EN/FR 5.0 50
l
H2 BusLeitgsLaenge−Leitungslaenge_3
Check repeater application
Given:
l Baud rate: 125 kbps
l Cable cross−section: 0.5 mm 2
l Number of nodes: 28
l Cable length: 450 m
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
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
ƒ Service interface
Advantage: Trouble−free connection during running bus operation is
possible.
ƒ Calibration interface
Advantage: calibration/programming unit remains electrically isolated.