West Control Solutions KS 800 CANopen Interface Manual - Manual (Page 43)

KS 800 CAN-Interface
11 CAN Physical Layer
Related to the CAN Physical Layer, there are a number of standards. The most important stan-
dard for general applications is the "CAN High-Speed Standard ISO 11898-2". The recommen-
dations given below are based primarily on this standard and are valid independent of the used
CAN protocol (CANopen / DeviceNet).
11.1 ISO 11898-2 nodes:
A node compliant with ISO 11898-2 comprises an _C with CAN controller (which may or may not
be integrated), which is connected with a CAN transceiver via Rx and Tx line. The transceiver is
connected to the differential CAN-H and CAN-L lines at the CAN bus. With KS800, this
(transceiver) connection is galvanically isolated.
With CAN bus, the nominal CAN bus levels are described as _Recessive_ (nominal voltage 2,5V
for CAN-H and CAN-L) and _Dominant_ (nominal 3,5V for CAN-H and 1,5V for CAN-L).
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