The CANBus I/O systems of the CAN-8000 series consist of a basic housing with 1, 2, 4 or 8 slots for plug-in modules, depending on the model. The CANopen or DeviceNet protocol is used for communication. I/O modules can be inserted into the slots in plug-in form, comprising both multi-channel analog input/output modules and digital input/output modules. The I/O systems function as slaves in the CAN network.