Will PCI-CAN card work with only 2 wires?

[GordonWD]

If I'm using my PCI-CAN card configured for internal power, do I need to connect anything other than CAN-L & CAN-H to my CAN network? I'm doing this right now and am able to correctly receive packets thru the card. However, it appears that my transmitted packets are not being seen by the other nodes. I'll know more when my CANalyzer arrives, but I was wondering if my cabling is OK as-is.

[MLH]

I currently have a connection set up with only CAN-L and CAN-H wires connected. I am able to transmit and receive with no problems at 500kbs, so it should work as long as the lines are properly terminated. (120ohm resistor bridging the wires at both ends)

[Golubkov]

Does the devices have the same ground?

[MLH]

My CAN card and my target board do not share the same ground. The only wires I have going between the two devices are the CAN-High and CAN-Low lines. The lines have a 120 ohm resistor sautered between them at both ends.