User-friendly software allows easy programming from a computer. For added flexibility, it provides three languages: Ladder for automation engineers, Electrical Diagrams for electricians, and Zelio for making program changes on the unit. The devices control circuits in OEM machinery such as automatic doors, hoisting, and conveyors. Available in ac and dc versions, they incorporate an LCD display on the front, 6 or 12 inputs, and 4 or 8 outputs.