YOKOGAWA DL9040L

6-66
IM 701310-01E
High-speed CAN (ISO11898) and Low-speed CAN (ISO11519-2)
Representative standards for the CAN physical layer are High-speed CAN (ISO 11898)
and Low-speed CAN (ISO 11519-2).
As shown in the following figure, the bus level is determined by the potential difference
between two buses, CAN_High and CAN_Low, in either standard.
0
1
2
3
4
5
Bus level [V]
CAN_High
CAN_Low
Node n
(Max:30)
Node 1
High speed CAN (ISO11898)
Recessive
Recessive
Dominant
CAN bus physical signal
CAN_High
CAN_Low
0
1
2
3
4
5
Bus level [V]
2.2 kΩ
2.2 kΩ
CAN_High
CAN_Low
Node n
(Max:20)
Node 1
Low speed CAN (ISO11519-2)
Recessive
Recessive
Dominant
CAN bus physical signal
CAN_Low
CAN_High
120 Ω
120Ω
Transfer rate: 1 Mbps or less Transfer rate: 125 kbps or less
6.16 Triggering on a CAN Bus Signal