The cPCI 7841 and PCI 7841 are CAN (Controller Area Network) interface cards

CAN is an extremely reliable general purpose communication protocol that rivals serial or Ethernet communications in many applications.

The boards utilise the Philips SJA1000 CAN controller chip, which features bus arbitration and error detection, with auto correction and re-transmission function. Supplied with an extensive software function library, the 7841 is an ideal way to inexpensively implement CAN I/O on a PC.'