6electrical installation – Lenze E82ZAFCC010 User Manual
Page 50
6
Electrical installation
Bus cable length
EDK82ZAFCC-010 DE/EN/FR 5.0
50
H2 BusLeitgsLaenge-Leitungslaenge_3
3. Compare both values.
If the value given in Tab. 2 is smaller than the required total cable length given in Tab. 1,
repeaters must be used. Repeaters divide the total cable length into segments.
Note!
ƒ
Please note the reduction of the total cable length due to the signal delay
of the repeater (see example
50
).
ƒ
There is mixed operation if
– different node devices are connected to the same mains.
– the total cable lengths of the nodes are different at the same baud rate,
the smaller value must be used to determine the max. cable length.
Example: Selection help
Given:
Cable cross-section:
0.5 mm
2
(according to cable specification 44)
Number of nodes:
63
Repeater:
Lenze repeater, type 2176 (cable reduction: 30 m)
At maximum number of nodes (63) the following cable lengths/number of repeaters must
be complied with:
Baud rate [kbps]
20
50
125
250
500
Max. cable length [m]
3900
1500
590
250
80
Segment cable length [m]
310
310
310
250
80
Number of repeaters
13
5
1
-
-
Check repeater application
Given:
Baud rate:
125 kbps
Cable cross-section:
0.5 mm
2
Number of nodes:
28
Cable length:
450 m