Length of seg-
ment [m]
Bus cable (shielded, twisted pair)
Max. transmis-
sion rate [kbit/s]
Conductor
cross section
[mm
²
]
Line resistance
[
W
/km]
Wave impe-
dance [
W
]
0...40
0.25...0.34 /
AWG23, AWG22
70
120
1000 at 40 m
40...300
0.34...0.60 /
AWG22, AWG20
< 60
120
< 500 at 100 m
300...600
0.50...0.60 /
AWG20
< 40
120
< 100 at 500 m
600...1000
0.75...0.80 /
AWG18
< 26
120
< 50 at 1000 m
The ends of the data lines have to be terminated with a 120
W
bus terminating resistor. The bus
terminating resistor is usually installed directly at the bus connector.
1
2
4
3
1
2
4
3
1
2
4
3
6
6
6
120
120
Node 1
Node 2
Node N
5
5
Fig. 4: CANopen interface, bus terminating resistors connected to the line ends
1
CAN_GND
2
CAN_L
3
Shield
4
CAN_H
5
Data line, shielded twisted pair
6
COMBICON connection, CANopen interface
Bus terminating
resistors
Device specifications
Communication modules (AC500 standard) > CANopen
2022/01/31
3ADR010278, 3, en_US
108
