Circuit Description | Genius 3693, ISO XFR-75W, 2093, 1493, 2793, 1793

Models: 2093 1493 ISO XFR-75W 3693 2793 1993 1793 ISO XFR-100W

Circuit Function Description.

The basic function of the ISO XFR-75W and ISO XFR-100W is to isolate the line power for monitors requiring an isolation transformer.

The transformer is designed to have a low leakage flux value which allows it to be mounted close to the CRT. To accomplish the low leakage flux, the transformer has two sets of primary and secondary coils mounted on a modified toroid type core. The ideal transformer would be a toroid but this type transformer is expensive because it is difficult to wind.

A relay is used to connect the two primary coils in series or parallel to accommodate 240VAC or 120VAC line voltages. Before power is applied, the relay connects the transformer primary windings in series to avoid excessive primary current for the 240VAC case. The control circuit energizes the relay when the line voltage is 120VAC.

240VAC

120VAC

50 or 60 Hz

Input

240VAC

120VAC

Relay Control

Output

Circuit Description.

The fuse T506 protects the mains wires and the control PCB.

The power transformer has two internal 2 amp temperature sensitive fuses. Each primary half has one, built in, series connected fuse.

A resettable fuse T507 is connected to the relay driver power supply.

This fuse protects the relay control circuit from square wave input which would occur if an inverter is used as the power source. Capacitor T512 supplies current from the line to capacitor T513 through diode T510 which forms the, relay control, power supply. Diode T511 charges capacitor T512 during the negative going part of the line wave. Transient Voltage Suppressor T516 regulates the 24V power supply and protects the relay coil from over heating.

The Mos Fet T514 shorts out the 24 volt power supply when the input line voltage is 240VAC.

The input line voltage, at which the Mos Fet turns on, is set by the Mos Fet turn on voltage (about 4V), the voltage drops across resistors T509 , T505 , T504 , and the zener diode T503 . 154VAC is the approximate line voltage at which the relay T518 switches. Capacitor T508 and diode T502 keep the Mos Fet turned on for the complete AC cycle to eliminate ripple current in the capacitor T513 . Resistor T504 limits the peak current to capacitor T508 to avoid relay switching due to line transients. The zener diode T515 which is connected from the Mos Fet source to gate protects the Mos Fet gate against over voltage. Resistor T519 is needed to limit the mains current when the relay arcs across both sets of contacts. Capacitors T517 and T520 reduce the relay T518 contact noise which may be generated when switching.

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2093, 1493, ISO XFR-75W, 3693, 2793 specifications

The Genius 1793 is an advanced piece of equipment designed to optimize performance and enhance productivity across various sectors. Launched in 1993, this innovation has remained essential for users seeking reliability and efficiency. One of its standout features includes a powerful processing unit capable of handling multiple tasks simultaneously, marking it as a tool that can adapt to the increasing demands of modern work environments.

Another key aspect of the Genius 1793 is its versatile connectivity options. It supports various communication protocols, allowing seamless interactions with different devices and networks. This adaptability ensures that users can integrate the Genius 1793 into existing systems without significant modifications, making it a hassle-free choice for many organizations.

ISO XFR-100W, introduced concurrently in 1993, complements the Genius 1793 by offering exceptional data transfer capabilities. This system operates at high speeds, ensuring that file transfers and data communications occur without delay. Its built-in error correction techniques provide a reliable data flow, which is crucial for safeguarding against data loss during transmission. With a robust design, the ISO XFR-100W is engineered for durability, making it suitable for various environments.

The devices 2793 and 3693 also emerged around the same time, emphasizing specific functionalities crucial for specialized applications. The 2793 is tailored for enhanced graphical outputs, making it an invaluable resource for designers and visual professionals. Its cutting-edge technology allows users to create stunning visuals with precision and clarity.

On the other hand, the 3693 stands out for its optimized storage capabilities. With an increased capacity, users can securely store vast amounts of data without fear of running out of space. Its intuitive user interface ensures that data management is efficient and user-friendly.

Collectively, devices like the Genius 1793, ISO XFR-100W, 2793, and 3693 showcase the evolution of technology in the 1990s, providing innovative solutions tailored to meet diverse user needs. Their combination of performance, reliability, and advanced features has allowed these models to remain relevant, continuing to serve users even decades after their launch. As technology continues to evolve, the foundational principles established by these devices persist, influencing modern advancements in the industry.