Interfaces
18
A05569_01_X00_00
HBM: public
AD105D
CAN H
CAN L
Control computer
Node 1
Node X
...
120
W
120
W
IN
OUT
IN
OUT
IN
OUT
Bus termination
Bus termination
Fig. 6.2
CAN bus wiring
Use a cable with a characteristic impedance of approximately 120
Ω
, e.g. HBM
cable 1-KAB173.
Maximum cable length subject to bit rate
Bit rate in kBit/s
10
20
50
125
250
500
800
1000
Max. cable length
in m
5000
2500
1000
500
250
100
50
25
The maximum cable length is the total line length, calculated from the length of
all the stub lines for each bus node and the line length between the nodes. The
length of the stub lines per node is limited and depends on the bit rate being
used.
Bit rate
The bit rate factory setting is 125 kBit/s. To change the bit rate use the PanelX
program or a configuration tool for CANopen. The transducer electronics sup
port the LSS protocol as defined by CiA DS305. So you can change the bit rate
and address with the PanelX program or a CANopen configuration tool. Gener
ally the change can only be made for one node. If necessary disconnect the
node from the bus system or deactivate the other nodes.