Wiring - Advantech PCL-841 Series User Manual

The CAN standard supports half-duplex communication. This means
that just two wires are used to transmit and receive data.
Wiring connections are as follows:
PCL-841 DTE (male DB=9)
Pin
7
3
2
Signal
CAN-H
GND
CAN-L
Terminal DTE
Signal
CAN-H
GND
CAN-L
Chapter 5 Wiring 29