The Eaton 9E series UPS is a line of online double conversion UPS systems designed to provide reliable power protection for critical applications in various industries. The 1:1 configuration indicates that the UPS is designed to have a one-to-one ratio between input and output voltage.

Key features of the Eaton 9E series UPS include:

1. Online double conversion topology: The UPS system continuously converts incoming AC power to DC and then back to AC power, providing a clean and stable power supply to connected equipment.

2. High efficiency: The 9E series UPS units are designed for high efficiency to help reduce energy costs and minimize heat dissipation.

3. Wide input voltage range: These UPS systems can operate over a wide input voltage range without relying on battery power, which helps to protect equipment from power fluctuations.

4. Scalability: The Eaton 9E series UPS offers scalability options to accommodate changing power requirements, allowing users to add additional modules for increased power capacity.

5. Advanced monitoring and management: The UPS units come with advanced monitoring and management features, including remote monitoring and control capabilities for easy management of the UPS system.

6. Redundancy options: Users can configure the Eaton 9E series UPS for N X redundancy to provide additional protection against power interruptions.

Overall, the Eaton 9E series UPS is known for its high reliability, efficiency, and advanced features, making it a popular choice for businesses looking to ensure uninterrupted power supply for their critical equipment and applications.