The 440R-C23139 safety relay features 1 NC and 2 NC inputs for light curtain and safety mat applications, with 3 NO safety outputs and 2 NC/2 PNP solid-state auxiliary outputs. It has a compact 45mm housing width, operates on 24V AC/DC supply, and includes removable screw terminals. The device supports both automatic and manual monitoring modes. Note: Factory warranty does not apply, but includes a 2-year Radwell warranty.