Features Descriptions

Over-Current Protection

The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode).

The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected.

Over-Voltage Protection

The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the over-voltage set point, the module will shut down and latch off. The over-voltage latch is reset by either cycling the input power or by toggling the on/off signal for one second.

Over-Temperature Protection

The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold

Vi(+)	Vo(+)
	Sense(+)
ON/OFF
	Sense(-)
Vi(-)	Vo(-)

Figure 16: Remote on/off implementation

Remote Sense

Remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. The voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here:

[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout

This limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim).

the module will shut down.

The module will try to restart after shutdown. If the over-temperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification.

Remote On/Off

Contact

Resistance

Vi(+) Vo(+) Sense(+)

Sense(-) Vi(-) Vo(-)

Contact and Distribution Losses

The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low.

Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain.

For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin to floating.

DS_E48SR05012_05222008

Figure 17: Effective circuit configuration for remote sense operation

If the remote sense feature is not used to regulate the output at the point of load, please connect SENSE(+) to Vo(+) and SENSE(–) to Vo(–) at the module.

The output voltage can be increased by both the remote sense and the trim; however, the maximum increase is the larger of either the remote sense or the trim, not the sum of both.

When using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current.

Care should be taken to ensure that the maximum output power does not exceed the maximum rated power.

Series E48SR specifications

The Delta Electronics Series E48SR is a cutting-edge power supply unit designed to cater to the demanding requirements of modern electronic devices. Renowned for its compact form factor and high efficiency, the E48SR series is ideal for various industrial applications, including telecom, data communication, and industrial automation.

One of the standout features of the E48SR series is its wide input voltage range. This versatility allows the unit to operate seamlessly across different regions and power environments, accommodating everything from standard AC mains to challenging scenarios like high-voltage fluctuations. The E48SR series supports a nominal input range of 100 to 240 VAC, providing a greater degree of flexibility for global deployments.

The E48SR series is also distinguished by its high efficiency, often exceeding 90%. This not only translates to reduced energy consumption but also minimizes heat generation, enhancing the longevity and reliability of the power supply. The incorporation of advanced technologies such as active PFC (Power Factor Correction) helps in maximizing efficiency while ensuring compliance with stringent energy regulations.

Another noteworthy characteristic of the E48SR series is its robust protection features. It is equipped with overload, overvoltage, and short-circuit protections, ensuring that both the power supply and connected devices are safeguarded against potential damage. These features are crucial in industrial applications where power stability is paramount.

In terms of thermal performance, the E48SR series employs a fanless design that enhances its reliability and reduces noise levels. This makes it particularly suited for environments where silent operation is critical, such as in office or laboratory settings. The unit is also designed for easy integration, with a standard footprint that fits into various mounting configurations.

Additional features include adjustable output voltage and current limiting, allowing users to customize the power supply to meet specific application needs. The E48SR series also supports remote sensing capabilities, enabling precise voltage regulation at the load end, further enhancing its usability in demanding scenarios.

Delta Electronics has built the E48SR series with durability in mind, ensuring that it can withstand harsh operational environments. With a wide operating temperature range, this series is capable of functioning reliably in extreme conditions, making it an excellent choice for mission-critical applications.

In summary, the Delta Electronics Series E48SR combines efficient power performance, robust protection features, and reliable thermal management in a compact design, positioning it as a preferred choice for various industrial applications.