Lenze ECSCExxx Manuel d'utilisateur télécharger pdf (Page 104)

Electrical installation

Wiring of system bus (CAN)

4



104

EDKCSCE040 DE/EN/FR 3.0

Example: Selection help

Specifications

l Cable cross−section: 0.5 mm

2

(according to cable specifications  102)

l Number of nodes: 63

l Repeater: Lenze−repeater, type EMF2176IB (cable reduction: 30 m)

For the max. number of nodes (63), the following cable lengths / number of

repeaters from the specifications must be observed:

Baud rate [kbit/s] 50 120 250 500 1000

Max. cable length [m] 1500 630 290 120 25

Segment cable length [m] 310 310 290 120 25

Number of repeaters 5 2 − − −

Check repeater application

Given:

l Baud rate: 125 kbps

l Cable cross−section: 0.5 mm

2

l Number of nodes: 28

l Cable length: 450 m

Procedure Cable length See

1. Total cable length at 125 kbps: 630 m Tab. 4−1

2. Segment cable length for 28 bus nodes and a cable

cross−section of 0.5 mm

2

:

360 m Tab. 4−2

3. Comparison: The value under point 2 is smaller than the required cable length of 450 m.

Conclusion

l It is not possible to use a cable length of 450 m without using a repeater.

l After 360 m (point 2) a repeater must be installed.

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