Jetter AG
Technical data | 4
User Manual – JCM-501-E01
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4.3.1 Ports and interfaces
CAN interfaces
Parameter
Description
Quantity
2
CAN_1 and CAN_2
Baud rate
125 kBaud, 250 kBaud, 500 kBaud
Protocols
CANopen
SAE J1939
Default node ID on the
CANopen bus
127 (0x7F)
Bus terminating resistor
CAN 1
Not built in
CAN 2
Built in (120 Ω)
External bus termination
Required for CAN 1
120 Ω
Cable specification
Twisted pair conductors, unshielded
Tab. 3:
CAN interfaces
CAN bus cable
Parameter
Description
Wire cross-section
500 kBaud: 0.34 mm² … 0.50 mm
2
250 kBaud: 0.34 mm² … 0.60 mm
2
Cable capacitance
60 pF/m max.
Resistivity
500 kBaud: Max. 60 Ω/km
250 kBaud: Max. 60 Ω/km
Number of cores
2
Twisting
CAN_L and CAN_H cables are twisted pairwise
Tab. 4:
Specification - CAN bus cable
The maximum permitted cable length depends on the baud rate being used and
the number of CANopen devices being connected.
Baud rate
Max. cable length Max. stub length
Total cable length
500 kBaud
100 m
5 m
30 m
250 kBaud
250 m
10 m
60 m
Tab. 5:
Cable lengths
