Lenze E82ZAFCC210 - Manual (Page 55)

Electrical installation
Bus cable length
6
EDK82ZAFCC-210 DE/EN/FR 4.0
55

H2 BusLeitgsLaenge-Leitungslaenge_3
3. Compare both values.
If the value given in Tab. 2 is smaller than the total cable length given in 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
 55 ).
ƒ Mixed operation
– Mixed operation is available if different nodes are operated on the same
mains.
– If the total cable lengths of the participants are different at the same
baud rate, the smaller value must be used in order to determine the
max. cable length.
Example: Selection help
Given:
Cable cross-section: 0.5 mm 2 (according to cable specification 49)
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