Zelio Programmable Relays Schneider Electric Zelio Logic Programmable Relays are designed for the management of simple automation systems. The new generation of Zelio Logic smart relays provides considerable gains from the design stage to monitoring applications in the industry and tertiary sectors. These Schneider Electric relays are available in two range choices, Compact versions with fixed configurations, and Modular versions which allow the use of extension modules and two programming languages (FBD or LADDER).