Why Two pairs of CAN_H and CAN_L going into One CAN Transciever ?Started by 6 years ago●2 replies●latest reply 6 years ago●67 views
CAN_A_H1 and CAN_A_L1 are connected to CANH and CANL of Transceiver. Also, CAN_A_H2 and CAN_B_H2 are connected to same CANH and CANL ?
CAN bus is a bus just as the name implies, transceiver CANH and CANL pins are all directly connected in parallel with a termination at each end of the bus. The two external connections are probably used for point-to-point attachment to adjacent control units or to a 120 ohm termination at each end:
T--CU----CU-- ... --CU--T
On the CAN bus Wikipedia page there is a nice picture of how CAN bus transceivers and terminators are connected.