canl can low canh
CAN uses a DB9 as standard.
Here are the pinouts.
9 Pin (male) D-Sub CANbus PinOut Pin # Signal Names Signal Description
1 Reserved Upgrade Path
2 CAN_L Dominant Low
3 CAN_GND Ground
4 Reserved Upgrade Path
5 CAN_SHLD Shield, Optional
6 GND Ground, Optional
7 CAN_H Dominant High
8 Reserved Upgrade Path
9 CAN_V+ Power, Optional
You dont have to connect the grounds, just can high and can low.
Each end of the bus must be terminated with a 120R resistor.
They are not in the tranceiver as the tranceiver might not be at the end of the bus.