The ET90000 Series 365-Day Astronomic Energy Control allow for independent programming for each day of the year to provide flexibility for applications where load switching differs frequently. These advanced control options provide dependable and uncomplicated performance, plus to-the-minute programming for accurate load control and reduced energy costs. Up to 4,000 setpoints or events can be preset to automatically repeat on an annual basis. Holiday or exception programming is available to allow temporary overrides of repeating schedules. The program can be disabled at any time per circuit by placing the circuit in the Disabled Operating Mode. Control buttons provide manual control of each circuit independently, regardless of the operating mode. Input voltage is automatically detected and adjusted between 120 and 277 VAC, 50 or 60 Hz. No settings or modifications are required for different voltages during installation. Circuit quantities can be increased after installation on 4-circuit and larger models by installing additional 4-circuit modules. All models come with a 100-hour supercapacitor to provide time keeping and automatic carryover without the need for a battery.  The supercapacitor is automatically recharged within 30 minutes of power being restored. Each time switch is housed in a lockable enclosure to protect against vandalism and unauthorized tampering. External devices, such as wall switches and occupancy sensors, can be used as input signals to the time switch, allowing a manual ON, timed OFF capability. Programming is simplified by a USB port, for easy copying and backups. Remote control and monitoring are available over Ethernet for ease of maintenance.