The Schneider Electric Square D 9001KM1 Light Module is a transformer-style pilot light for 30 mm Harmony 9001K/SK control units, designed for 120 VAC operation. It uses an incandescent lamp with a BA9S base, wired via screw terminals, and is housed in a clear 30 mm diameter module suitable for direct or surface mounting. The unit measures 2.13 inches wide by 1.57 inches high. Typical applications include signaling and indicator illumination in industrial control panels and automation equipment that utilize 9001K/SK push-button assemblies.
