Electrical installation – Lenze E82ZAFUC001 User Manual
Page 55
Electrical installation
Bus cable length
EDK82ZAFUC−001 DE/EN/FR 4.0
55
l
H2 BusLeitgsLaenge−Leitungslaenge_3
3. Compare the two values determined.
If the value given in Tab. 2 is smaller than the required total cable length from Tab. 1,
repeaters must be used. Repeaters divide the total cable length into segments.
)
Note!
ƒ
Note the reduction of the total cable length due to the signal delay of the
repeater (see example
ƒ
Mixed operation
– There is mixed operation if different nodes are connected to the same
mains.
– If 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:
l
Cable cross−section:
0.5 mm
2
(according to cable specification
l
Number of nodes
connected:
100
l
Repeater:
Lenze repeater, type 2176 (cable reduction: 30 m)
For the above selections the following cable lengths / number of repeaters must be
observed:
Baud rate [kbps]
10
20
50
125
250
500
1000
Max. cable length [m]
8000
3900
1500
630
290
120
25
Segment cable length [m]
270
270
270
270
290
120
25
Number of repeaters
33
16
6
2
−
−
−