H. Input / Output EMI / RFI Filters

2.3System Operation

The UPS shall operate as an on-line, fully automatic system in the following modes:

A. NORMAL - Incoming AC power is boosted using a chopper circuit,

and converted into DC power. The DC power is then used to charge the battery bank while at the same time providing clean, DC power to the inverter circuitry. The inverter converts DC power to regulated AC power which feeds the load.

B. EMERGENCY - Upon failure of commercial AC power, the UPS shall derive power from the battery bank and continue feeding the load with clean, regulated AC power. There is no interruption to the critical load upon failure or restoration of commercial AC power.

C. RECHARGE - Upon restoration of the commercial AC source, the rectifier/chopper powers the inverter while simultaneously recharging the battery bank. The UPS shall have the following recharge process:

a)a constant level of current is used to recharge the batteries (the process shall utilize a current-limit function to prevent overcharging batteries, thus extending the life of the batteries)

b)as the batteries reach the normal charge level, a constant-voltage control shall begin which causes the battery recharge current to gradually decrease

c)Under normal operation, the UPS battery bank "floats" at the 2.25-2.27 volts per cell DC level to stay fully charged and ready for the next discharge.

D. BYPASS MODE - Upon detection of an internal fault or output overload, the UPS shall automatically switch from inverter power to an internal bypass via the static switch. Transfer shall be within 4 milliseconds, causing no interruption to the critical load. While in bypass, the UPS shall protect against spikes and common/normal mode noise by utilizing a dual-winding output isolation transformer. “Return from Bypass mode” shall be an automatic function, without interruption to the critical load. Transfer to Bypass may also be performed as a manual operation via the UPS front panel.

E. POWER CONDITIONING MODE - Should the batteries be removed from the UPS, the UPS shall continue to function and still provide

4200FA XT1

September 6, 2004

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Toshiba TOSHIBA 4200FA specifications September 6
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TOSHIBA 4200FA specifications

The Toshiba TOSHIBA 4200FA is a high-performance hard drive designed for various computing applications, focusing on reliability and performance. It is part of Toshiba's extensive family of storage solutions, and its specifications make it particularly suited for enterprise environments where large data storage and quick access times are essential.

The 4200FA is built with advanced technology, offering a rotational speed of 4200 RPM, which strikes a balance between energy efficiency and performance. This speed is suitable for everyday computing tasks, making it a reliable choice for both personal and professional use. The drive supports SATA interface technology, ensuring compatibility with a wide range of systems and motherboards.

One of the standout features of the Toshiba 4200FA is its storage capacity. With options reaching up to several terabytes, it caters to users with substantial data storage needs, such as digital media creators, gamers, and data-heavy applications. The drive's large capacity is complemented by a high data transfer rate, allowing for rapid reading and writing of information. This efficiency is particularly beneficial for tasks that require frequent data access.

The Toshiba 4200FA also emphasizes reliability and durability. It is equipped with Shock Sensor technology, which detects excessive vibrations and automatically adjusts the drive's read/write heads, minimizing the risk of data loss due to sudden movements. Additionally, the drive is built to endure long service life cycles, suitable for 24/7 operational environments.

Another important characteristic is energy efficiency. The Toshiba TOSHIBA 4200FA is designed to consume less power than traditional hard drives, contributing to reduced overall system power requirements. This feature is especially advantageous in laptops and portable devices, extending battery life for users on the go.

In summary, the Toshiba TOSHIBA 4200FA is a robust storage solution featuring a combination of decent rotational speed, significant storage capacity, advanced technologies, and an emphasis on reliability and energy efficiency. Its design makes it a versatile choice for various applications, appealing to users who prioritize performance and data integrity in their computing experiences. With its enduring qualities, the 4200FA stands out as a dependable component for both personal and enterprise storage needs.
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