Remote Control 48V DC Power Supply For Telecommunications Equipment

High power density DC module

EV4850M2 rectifier Module

Input: 90-290Vac; output : 43-58Vdc；Capacity:2900W

Perfect Application

48Vdc distributed system

Ethernet

Inter-changer

LAN(local area network)

Server

Indoor wireless network

Telecommunications equipment

Features:

u Compact structure, power density up to 23.5W/in3

u Output voltage adjustable 43-58Vdc, default 53.5V

u Wide working temperature range: -40～+45°C, (extended optional: +45～+65°C)

u Power factor correction ≥0.98

u RS485 communication interface

u Input over-voltage protection

u Output over-voltage protection

u Output over-current protection

u Over temperature alarm and protection

u Parallel via bus current equalizing

u Remote control On/Off

u Hot swap

u Comply to UL1 60950, CSA2C22.2 60950-00, VDE30805 IEC60950 requirements

u CE4 marking complies with 73/23/EEC and 93/68/EEC directives

u High efficiency, >95%

1.Specification:

2.Function

Output over-voltage shutdown

If the output voltage exceeds the preset value, the rectifier will automatically shut down. Reduce the overvoltage shutoff point by approximately 1V at full load to ensure that the rectifier shuts off smoothly during overvoltage. Overvoltage shutdown voltage can be adjusted and set at the factory.

Hot-swap

When quick plugging and unplugging of the module is performed, the inside of the module should be fully discharged to ensure that the automatic restart of the module can be completed smoothly. To ensure sufficient internal discharge of the power supply, observe the rotation of the fan after the module is removed. Do not insert the module until the fan stops rotating.

Input inrush current

When the rectifier is started, the input impulse current peak value is not more than 2 times the maximum input current. At startup, the output voltage and current will rise slowly from zero, providing a soft load characteristic for the device.

Over temperature protection

When the rectifier reaches its maximum operating temperature, the rectifier gradually reduces the output current to lower its internal temperature. In extreme environments, the internal temperature of the rectifier may continue to rise even if the output current is reduced. In this case, the rectifier will be completely shut down and restart automatically after the internal temperature returns to normal.

When fully loaded, the rectifier operating temperature: -40 ~ +45 °C, the maximum operating temperature is +65 °C, in the +45 ~ +65 °C temperature rectifier under load, in order to maintain its internal temperature within the normal range.

Current equalizing

Current sharing characteristics

When sharing several rectifiers in the system, the rectifier will effectively share current. Each rectifier's hardware monitors the bus voltage and adjusts its own output current to match other rectifiers.

Forced air cooling

The rectifier constantly monitors its internal temperature, ambient temperature, and output current to adjust fan speed. This type of fan speed control reduces noise and dust build-up. If a fan stops working and cannot be restarted by the microcomputer, a fan failure alarm signal will be issued and the rectifier output current will be reduced.

3.Signal

Shenzhen HRD Science and Technology Co., Ltd is one of the largest high-tech manufacturer specializing in middle and high quality UPS , ,inverters, Voltage regulator,Battery and customised power supply.

HRD UPS is strongly based on a high level professional R&D team with own core technology in both hardware and software and a rich managerial experience management.With fast developemnt since company founded in 2010, HRD has grown into a leading professional UPS manufacturer with ISO9001:2015 , ISO14001,ISO18001 certified and become well-know in both China and abroad .

So far, HRD high quality power products have been exporting to more than 60 countries all over the world, including OEM to world-famous brands from both USA and Europe and more than 25 nos brand distributors.

The high quality UPS, Inverter,and battery ect power products are also successfully widely used for the Chinese Army power system and let’s become one of the two appointed UPS supplier of the People’s Libration Army General Armaments Deparment and appointed supplier of the central government of China ,too.

As one of the most tech leading power solution expert,HRD is still committed to providing high level quality power products and thoughtful services for middle and high level global clients since the company founded.

With 2 large manufacture bases of more than 18000 square meters in Bao’an District Shenzhen and Foshan Guangdong province,we make sure to deliver each high quality product on time to our golobal clients.

Thanks to the core competetive power behind HRD product --Quality, Service and Efficiency, has powerfully assisted HRD winning more and more global clients’ preference.

On the way of HRD’s rapid development, we have witnessed each development milestone with our clients.We look forward to creating and witnessing more legendary with you in power field!

We warmly welcome and expect your visit to HRD in Shenzhen China!

Mission: Produce high quality energy products and provide complete power solution to worldwide partners for middle and high end market;

Vision:To be a world-class company in energy solution provider.