Lenze CANopen Controller-based Automation - Manual (Page 24)

Lenze · Controller-based Automation · CANopen® Communication Manual · DMS 6.3 EN · 04/2014 · TD17
24
5 Technical data
5.4 Bus cable length
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Example: Check use of repeater
Conclusion:
• It is not possible to use a cable length of 450 m without using a repeater.
• After 360 m (test step 2) a repeater has to be used.
Result:
• The Lenze repeater, type 2176 (cable reduction: 30 m), is used
• Calculation of the maximum cable length:
• First segment: 360 m
• Second segment: 360 m (see table
Segment cable length ( 22) ) minus 30 m (cable reduction
for a repeater)
• Max. achievable cable length with a repeater: 690 m
• The selected cable length can be implemented.
Given:
Baud rate
125 kbps
Cable cross-section 0.5 mm 2
Number of nodes 28
Cable length 450 m
Test step Cable length See table ...
1 Total cable length at 125 kbps: 630 m  Total cable length ( 22)
2 Segment cable length for 28 nodes and a cable cross-
section of 0.5 mm 2 :
360 m  Segment cable length ( 22)
3 Comparison: The detected segment cable length is
smaller than the total cable length of 450 m to be
achieved.