CiA 447: CANopen application profile for special-purpose car add-on devices

The CiA 447 four-part application profile specifies the virtual control network for the add-on devices used in special-purpose passenger cars such as taximeter, roof bar, etc. Add-on devices communicate with the car's IVN (in-vehicle network) gateway, which provides IVN-signals in pre-defined manner and serves as NMT master in the add-on network.