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  • Liebert PSA UPS Brochure

  • Liebert PSA UPS Run Time Chart

  • Liebert PSA Specifications Guide

  • Liebert Power Solutions


Liebert PSA Line-Interactive UPS, 500 - 1500VA

Emerson Network Power


The Liebert PSA is an economical line-interactive UPS that offers full-featured power protection for small office computers and electronic equipment.

Liebert PSA offers unique features and extraordinary performance not normally found in similar products in this price range.

Liebert PSA is a line-interactive UPS that provides up to five minutes of back-up time at full load more than enough time to save work in progress and shut down the connected equipment. USB shutdown software and a USB cable are also included.

The UPS offers three or six battery-backed outlets, and one or two surge-only outlets. The UPS is available in 500VA, 650VA, 1000VA and 1500VA sizes, 120V and 230V models.

The Liebert PSA is Ideally suited for:
  • Professional Desktop PC’s
  • Professional Workstations
  • Small Routers, Bridges and Hubs
  • Point-of-Sale Terminals
  • Other Sensitive Electronics

Liebert PSA UPS Supports Your Sensitive Electronics With These Standard


  • Available in four sizes, including 500, 650, 1000 and 1500VA; 120VAC or 230VAC
  • Three to six battery-backed UPS outlets,depending on model size
  • One to two surge-only outlets, differentiated by color
  • USB communications / shutdown software and cable included User replaceable batteries

  • Up to five minutes of battery backup time at full load
  • Full sequenced battery testing to ensure batteries are available when needed
  • Advance early warning of UPS shutdown
  • Lightning and surge protection (TVSS)
  • RJ-45 port for data line surge protection
  • Site wiring fault indicator

Run Time Charts

Low Total Cost of Ownership

  • Two-year replace or repair warranty

Features and Benefits
  • Wide input voltage window and buck/boost operation corrects poor input power without a need to use precious battery power.
  • 3-6 minutes runtime at full load
  • USB communication
  • Mini Tower Design
  • 3 to 6 battery-backed outlets
  • 1 to 2 surge-only outlets
  • RJ-45 Data line protection
  • User replaceable batteries
  • Support Multilink shutdown software

What is in the Box?

  • UPS
  • Quick Start Guide
  • USB Cable
  • Output Cable
    – 2x for 500VA/650VA
    – 3x for 1000VA/15000V

FAQ - Frequently Asked Questions

How long can I backup for 1 PC?
Typical PC and LCD consumes 200VA load
  • PSA500MT3-230U 18 minutes
  • PSA650MT3-230U 20 minutes

Can PSA Support Server?

PSA can support PC/servers using non-PFC power supply, as long as the power consumption does not exceed UPS capacity.

What communication interface does PSA provide?
  • PSA comes with USB communication port.
  • Windows built-in power management functions provide monitoring of UPS status and manage the automatic orderly shutdown of the computer if a power outage ever exceeds the battery capacity of the UPS.

Can PSA have additional USB or RS232 port?
No. PSA1500 comes with one USB port. It can only communicate with one PC or server.

What are the advantages of surge-only outlets?
Non-critical and high power consumption equipments should connect to surge-only outlets so that critical equipments connected to battery-protected outlets can last longer during power outages.

Optional Items
There is no optional items for PSA3G.

  • MultiLink 4.0 support USB communication and Network Shutdown but for Windows OS only.
  •  MultiLink 4.0 is downloadable from web and CD will be available in the package later this year
PSA has no SNMP/Web capability

What is the warranty of Liebert PSA?
Standard micro UPS warranty will apply.



Six Questions to Ask When Implementing a Data Center Infrastructure Management (DCIM) Solution

Data center managers have been challenged to maintain or increase IT availability, server utilization and efficiency in the face of rising costs and demands. One strategy to help address these challenges is virtualization, which increases server utilization and enables greater energy efficiency.

But virtualization also makes it more difficult to predict the demand on physical systems at any given time. As a result of the uncertainty in physical system demand, the data center manager is compelled to reserve a resource buffer against overload at peak capacity.

A holistic DCIM approach provides new insights into the relationships between facilities and IT infrastructure components, enabling data center managers to better optimize their data center resource consumption.

These are the questions Emerson Network Power recommends data center managers ask before deploying a DCIM solution:

1. What are the critical infrastructure assets in my data center and what are their respective mission interdependencies? An inventory repository can provide the data center manager with a “reality check” of today’s high-value assets, as well as context in the data center plan for tomorrow. This forward-looking insight gives a continual business-oriented view into these critical assets allowing better return-on-investment (ROI) on assets as well as freeing up data center budget for other compelling priorities—a top of mind concern for data center managers.

2. If asked by my management, could I quickly retrieve a comprehensive monitoring and analysis report of all the assets in my data center, and would this report identify bottlenecks? An effective DCIM solution should monitor all space, power and cooling attributes within the data center environment. To avoid an environmental-based operational failure, the DCIM solution should provide reports that enable the data center manager to take proactive action. The ability to report these data center conditions should be available on-demand to the data center manager.

3. Can my data center manage day-to-day workloads with flexibility while servicing on-demand needs as they arrive for my company? The DCIM solution should provide process workflow that can perform:

  • Scenario development—the ability to model changes before they go into production,
  • Nested processes that list steps that must be completed before an action is approved,
  • Measurement against service level agreements (SLAs), which are standard or custom metrics for measuring success, and 
  • The ability to provision into underutilized space, power and cooling capacity. This function should recommend optimal placement for devices based on their unique requirements and the existing load/capacity in the infrastructure.

4. Does this DCIM solution provide the trend analysis and intelligence needed for my team to deliver a comprehensive capacity management plan? To gain control of the current and future usage of data center resources, DCIM solutions should provide data center managers with insight into: 

  • Projection pipelines—what projects are in various stages of approval and what the impact will be on the infrastructure, and 
  • Trending for current and projected utilization (curves based on historical usage). For example, data center management should be able to tell when capacity or cooling will run out, based on utilization trends.

5. What intuitive web-based executive summary and planning tools are provided in the solution? DCIM solutions should provide configurable web-based dashboards and analytics standard within the product. Automating the operational intelligence gathering and reporting through a comprehensive web-based dashboard enables an executive summary that becomes the single source of truth into DCIM and planning. 

6. Will the DCIM solution align with IT and business services? Aligning IT service to address business objectives and needs is paramount. Any DCIM solution must enable data center management to align their respective resource consumption with their current ITSM, ITIL and BSM strategies.

“Data center managers are under more pressure than ever to achieve higher capacities with greater efficiency and less risk of downtime,” said Steve Hassell, president of the Avocent business of Emerson Network Power.“

A holistic DCIM strategy is a data center manager’s best partner in meeting the stringent business demands in a modern-day data center environment.

To successfully implement a DCIM strategy, data center managers must be on the lookout for the best family of hardware, software and services that allows them to address the critical infrastructure gap

Documentation & Downloads

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  • Liebert PSA UPS Brochure

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