Phoenix Contact Axioline Smart Element stations consist of either a controller or bus interface module, one or more base units, and any combination of available smart elements to meet your I/O needs. Digital and analog smart elements are configuration-free for simplified integration. Special function elements may require some basic configuration which can be accomplished using the freeware Startup+ configuration software. If additional I/O signal types are not available in smart elements, standard AXL F I/O modules can be added to backplane.