The Functional Devices RIBMNLB-4 Rib Logic Board is a versatile track-mounted control board featuring 4 inputs designed for automation and control applications. It allows users to connect various control devices like switches, sensors, and relays, streamlining complex control systems. Each input can be configured independently, making it highly adaptable for custom setups. https://www.partshnc.com/ribmnlb-4-functional-devices-rib-logic-brd-trackmnt-4-inpts