Lenze E84DGFCC Manual do Utilizador descarregar pdf (Página 28)

Communication manual 8400 motec CANopen

Installation

Electrical installation

28 L EDS84DMOTCAN EN 3.0 - 11/2011

Consider the use of repeaters

Conclusion:

 A cable length of 450 m is not possible without installing a repeater.

 After 360 m (step 2), a repeater must be installed.

Result:

 The Lenze repeater, type 2176 (cable reduction: 30 m), is used

 Calculation of the max. cable length:

– First segment: 360 m

– Second segment: 360 m (according to the table Segment cable length

[5-2] ( 27))

minus 30 m (cable reduction when a repeater is used)

 Max. possible cable length with one repeater: 690 m

– Now the required cable length is possible.

 Note!

The use of an additional repeater is recommended as:

• Service interface

– Advantage: Trouble-free connecting during ongoing bus operation is

possible.

• Calibration interface

– Advantage: Calibration/programming units remain electrically isolated.

Given

• Baud rate: 125 kbps

• Cable cross-section: 0.5 mm

• Number of nodes: 28

• Cable length: 450 m

Steps Cable length See

1 Total cable length at 125 kbps: 600 m Table Total cable length

[5-1] ( 26)

2 Segment cable length for 28 nodes and a

cable cross-section of 0.5 mm

360 m Table Segment cable length

[5-2]

( 27)

3 Comparison: The value determined in

step 2 is smaller than the required cable

length of 450 m.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 110 111

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Lenze E84DGFCC Manual do Utilizador Página 28