Remote Supervisor. All Leviton Panel mounted SPD’s are equipped with real-time diagnostics that indicate protection status. However, when these units are mounted in electrical closets, or other out-of-the-way locations, a diagnostic alert might not be seen or heard for some time. The Remote Supervisor can relay protection failure or power interruption warnings from one or more Leviton panel-mounted SPD’s. Warnings are provided by an optically coupled sensor and data lines comprising up to 5000 feet of #20 or #22 twisted-pair wiring. One Remote Supervisor can monitor up to six panel-mounted SPD’s. The Remote Supervisor provides both a visual and audible alert, which can be silenced at the press of a button. The unit is equipped with a test circuit, and designed for surface mounting. It draws power from any 120V source through a six-foot line cord.