Review (April 2005)
By Kevin Nakano
Tripp Lite has been in the business of making DC-to-AC power inverters for decades. The need for such products boomed when PCs became popular and the demand continues to grow as more consumer electronics benefit from clean, uninterrupted power. More recently A/V systems have begun to see the benefits of UPS designs, particularly with the new digital projectors that require cooling when they are initially powered down. Failure to properly cool down these projectors can result in shortened life and/or damage to the hardware. Normally this is not a problem, but in the event of a power failure the need for a UPS becomes apparent. Tripp Lite has many solutions, but we were drawn to the Smart Online UPS for its design topology.
Tripp Lite's Smart Online SU1000RTXL2U is a 2 rack space (2U) unit that features double conversion (AC-to-DC and DC-to-AC) for the ultimate in power backup and conditioning. The unit comes with tower stands for the chassis so that the unit can be installed in an upright position if desired. The unit also includes side support and rack ears for rack mounting the unit. Although the unit was designed to protect critical servers, as well as networking and telecommunications equipment from blackouts, voltage fluctuations and transient surges, the design also works well with A/V equipment. Addressing the concern of emergency projector power, the SU1000RTXL2U provides plenty of clean synthesized AC to your costly investment. We powered our Optoma H77 high definition DLP projector during our tests.
The large capacity 1kVA/800 watt UPS design continuously converts the incoming utility AC to DC, and then uses the DC to AC inverter to produce virtually perfect sine wave AC power (120VAC, ± 2%) to the connected equipment. The result is a significant reduction in harmonic distortion, high frequency electrical impulses, frequency fluctuations and other difficult-to-solve power related problems. Many UPS designs simply switch to the inverter when a problem is detected, but can do little for small voltage and frequency variations. By continuously converting power in the unit, the user is always getting the same clean power regardless of the incoming utility voltage.
The green Line indicator will illuminate constantly when normal utility power is connected to the unit and the Load Active Meter LED will illuminate with the level meter representing the load connected. The Line indicator will begin to flash if the UPS is receiving a voltage that is too high or too low. In either case the UPS will continue to provide clean AC power to the connected equipment. Both the Line and On Line indicator will turn off when the utility power fails. Once this occurs, the On Batt will illuminate indicating only battery power reserve is available. The Batt Active Meter LED will illuminate with the level meter representing the battery level. The Batt Low LED indicates when the battery capacity has reached a critical level. The Replace Batt light will illuminate and the unit will emit three beeps if the battery fails the self test when the unit powers up.
Using a web browser we accessed the vitals of the SU1000RTXL2U through our local network via the ethernet connection. The interface worked very well and gave us access to all the UPS data one could ask for. The advantage of the web-based interface is that anyone on the network can access any UPS fitted with the SNMP/Web card. Each unit needs to be configured with a unique IP address and can even be username/password protected if desired to prevent unauthorized personnel from changing the settings. The authorized user can also make changes to the network setting through the web browser. If a dedicated PC is connected to the UPS, Tripp Lite has their PowerAlert software that comes with the unit. We installed PowerAlert Version 11 for our tests and used the serial cable.
The large capacity 1000VA/800 Watt design provides continuous 120 VAC ± 2% for up to 18 minutes under half load and 6 minutes under full load. Optional battery packs connected to the rear panel can extend this time if needed. The six outlets are arranged in two individually controlled load banks that can be independently switched using the software interface. This allows the user to selectively reboot equipment connected to the unit or shed less critical loads to extend battery life on other connected components. The built-in serial interface allows the unit to be controlled either by a local computer or remotely using the optional SNMP/web card. The two-way (rack or tower) mounting configuration with hardware included makes it easy to integrate into any system. If you want clean power 100% of the time with zero transfer time in the event of a power failure, Tripp Lite's Smart Online UPS is the answer.
- Kevin Nakano
Optoma H77 High-Definition HD2+ DLP™ Projector
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