3 specification of the bus cable, 4 bus cable length, Specification of the bus cable – Lenze E84DGFCC User Manual
Page 26: Bus cable length, Communication manual 8400 motec canopen
Communication manual 8400 motec CANopen
Installation
Electrical installation
26
L
EDS84DMOTCAN EN 3.0 - 11/2011
5.2.3
Specification of the bus cable
We recommend the use of CAN cables in accordance with ISO 11898-2:
Observe the notes provided on the
5.2.4
Bus cable length
Total cable length
1. Check that the total cable length is not exceeded.
The total cable length is determined by the baud rate.
[5-1]
Total cable length
CAN cable in accordance with ISO 11898-2
Cable type
Paired with shielding
Impedance
120 Ω (95 ... 140 Ω)
Cable resistance/cross-section
Cable length ≤ 300 m
Cable length 301 ... 1000 m
≤
70 mΩ/m / 0.25... 0.34 mm
2
(AWG22)
≤
40 mΩ/m / 0.5 mm
2
(AWG20)
Signal propagation delay
≤
5 ns/m
Note!
• It is absolutely necessary to comply with the permissible cable lengths.
• Please take into account the reduction of the total cable length due to the
signal delay of the repeater.
• Mixed operation refers to different nodes being connected to the same
network.
• If the total cable lengths of the nodes are different at the same baud rate, the
smaller value must be used to determine the maximum cable length.
Baud rate [kbps]
Max. bus length [m]
20
4013
50
1575
125
600
250
275
500
113
800
38
1000
13