Liebert PSA and Liebert PSI-XR UPS Emerson Network Power announced the availability of enhanced Liebert PSA and Liebert PSI-XR UPS units designed to provide reliable power protection for small data centers or IT rooms. The Liebert PSA and Liebert PSI-XR also meet strict environmental guidelines by complying with the Restriction of Hazardous Substances Directive (RoHS). RoHS prohibits the use of six hazardous materials in the manufacturing of electronics, making them more environmentally friendly at the end of their life. The Liebert PSI-XR is best suited for IT applications housed in network closets, IT rooms, and small data centers. It provides more than five minutes of battery backup at full load with optional external battery cabinets that can extend that runtime to meet equipment needs.