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Remote Control 48V DC Power Supply For Telecommunications Equipment

Categories 48V DC Power Supply
Brand Name: HRD OR OEM
Model Number: 48VDC 50A
Certification: CE
Place of Origin: SHENZHEN CHINA
MOQ: 10
Price: USD 150-280/PCS
Supply Ability: 100pcs/month
Packaging Details: Standard for export
EFFICENCY: above 95%
INPUT: 90-290VAC
PROTECTION: Input over-voltage , over-voltage protection,Over temperature
model: 48VDC 50A
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    Remote Control 48V DC Power Supply For Telecommunications Equipment

    High power density DC module

    EV4850M2 rectifier Module

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

    Perfect Application

    48Vdc distributed system



    LAN(local area network)


    Indoor wireless network

    Telecommunications equipment


    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%


    Input voltage90110/220290VacLong rime bearing with 320VAC, no damage
    Input frequency4550/6065HzRated load
    Input current18.5A176VAC full load
    PF0.98Rated input /rated load
    Power conversion151155159VacCapacity decrease from 2900W to 1200W

    Output voltage4353.558VdcSettable by monitor(condition :without load)
    Output current05053A
    Ripple Value(Max)200mVIn the rated input/output, plus one 0.1uF ceramic capacitor and one 10uF high frequency electrolytic capacitor each, the bandwidth is 20MHz.
    Output capacity29002950WInput range within 154-290V
    1200WInput range within 90-154V
    Output efficiency9595.6%220V AC input ,25%-75%load
    86%110V AC input range
    Dynamic response overshoot±5%
    Dynamic response time200us25%-50%-25% or 50%-75%-50% load change, jump rate 0.1A/us, transition period 4ms, equal upper and lower half cycles.
    Start up time310SThe rated input voltage is switched on until the output voltage reaches 42VDC; To start output, it requires to use the pre-limit current function.
    ON/OFF overshoot±5%
    Unbalance level±5176-290Vac,50%-100% load
    Telephone weight noise2mV
    Broadband noise voltage






    Discrete noise










    Input overvoltage protection300310320VdcSelf-recovery, restore voltage 10V
    Input overvoltage protection recovery point290Vdc
    Input undervoltage protection758085VdcSelf-recoverable
    Input undervoltage protection recovery point90Vdc
    Output overvoltage protection point596061VLocked up
    Output current limit protection54ASelf recovery
    Short circuit protectionLong-term short circuit; self-healingASelf recovery
    Power over temperature protectionAutomatic recovery at ambient temperature 60°CC

    Operating temperature-4065°C
    Transportation environment temperature-4070°C
    Storage temperature-4070°C
    Altitude04000m3000-4000m, use high temperature derating under ambient conditions, drop 1°C for every 200m increase
    Seismic level4Zone
    Atmospheric pressure70106KPa
    Noise4555dBNoise is proportional to fan speed, load size, and ambient temperature
    Sleep power consumption4W
    Remark: At 45°C, the module can output the maximum output power without over-temperature protection; when it is higher than 45°C, the module power is automatically derated. When it rises to 65°C, the module is over-temperature protected.

    EMC and others
    Radiated Emission (CE)EN55022 - Class A
    Conducted Emission (RE)Input :EN55022 - Class A output :Class A
    Electrostatic discharge

    EN/IEC 61000-4-2

    Contact discharge ± 6KV, Air discharge ± 8KV, Criterion B; Contact discharge ± 8KV, Air discharge ± 10KV, Criterion R

    Contact discharge ±2KV, criterion R

    Harmonic emissionEN/IEC61000-3-2 CLASS A
    Radiated immunityEN/IEC 61000-4-3 Level 3 (10 V/m).
    Conducted immunityEN/IEC 61000-4-6 Level 3 (10 V/m).
    Fast transient burstEN/IEC 61000-4-4 Level 3 (2 kV, 5 kHz repeating)
    SurgeEN/IEC 61000-4-5 Level 3 Criterion: B,L-L :±2KV,L-G:±4KV

    Lightning impact

    No failure

    No damage

    EN/IEC61000-4-5 Level 4 (common mode 4kV, differential mode 2kV)

    ANSI C62.41 Level A3 (Common Mode and Differential Mode 6kV)

    Voltage Dips and Short-Time Interrupt Immunity (DIP)EN/IEC61000-4-11 drops to 70%, 40%, 0% Ut for durations of 100ms, 20ms, 10ms at 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315 ° Each phase falls and meets criterion B
    Voltage fluctuations and flickerEN/IEC61000-3-3 Pst ≤ 1.0; P1t ≤ 0.65; dc ≤ 3%; dmax ≤ 4%; d(t) value exceeds 3% of the time ≤ 200ms
    Reliability (Calculation)≤250,000 Hours
    Parallel functionN+1,unblance within ±5%;
    Voltage Dips and Short-Time Interrupt Immunity (DIP)Sinusoidal vibration: 5 - 9Hz; Amplitude 3.5mm; 9-200Hz; Acceleration spectral density: 10m2/s3; 3 axial, sweep frequency vibration 5 times in each direction, 1OCT/MIN (1 octave/min)
    Voltage fluctuations and flickerRandom vibration: 2-10 Hz, 10 m2/s3; 10-200 Hz: 3 m2/s3; 200-500 Hz: 1 m2/s3; 3 axial directions, each 30 min.

    Insulation class
    input Output3000Vac/10mA//1minNo arcing, no breakdown, with discharge tube removed during test
    Input - Earth1500Vac/10mA//1min
    Output - Earth1500Vac/10mA//1min
    Contact current (input to ground)≤3.5 mAInput 264Vac /50HZ
    Insulation resistance≥10MΩUnder normal atmospheric pressure, when the relative humidity is 90% and the test voltage is 500V DC, the insulation resistance of the power input to the output, the input to the ground, and the output to the ground shall not be lower than 10MΩ.

    Mechanical properties
    Weight (kg)≤3.8Kg


    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.


    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.


    Socket typePinSignal meaningLabelingContact sequence

    AC input (J1)

    FCI 51939-021

    1Module AC inputL2
    2Module protectionPE1
    3Module AC inputN2

    DC output and signal (J2)

    FCI 51939-022

    1Module address lineADDRESS03
    2Module address lineADDRESS13
    3Modules are streamlinedLOADSHARE+3
    7Module address lineADDRESS23
    8Module address lineADDRESS33
    9Modules equalizing lineLOADSHARE-3(kept)
    10RS485 ++5V3
    11RS485 -+5VGND3
    12Module communication lineRS485-3
    13Module address lineADDRESS43
    15Module communication lineRS485+3
    16Address line GNDADDR_GND3
    Module output 48V+DC+2
    Module output 48V+DC+2
    Module output 48V-DC-1
    Module output 48V-DC-1

    LED Indicator
    Indication markIndicator colorStatusInstruction Meaning


    ONMains input is normal and module is working normally
    OFFMains failure (no AC input, AC input overvoltage, no output from the module)

    Protection indicator


    OFFNo module failure
    ONThe power module is abnormally temperature-pre-alarmed; it sleeps and shuts down (only the protection indicator is on when the device is powered off, and the module does not report alarms).
    Fault indicatorredOFFNo module failure
    ONThe red light is on when the output is over voltage shutdown, fan failure, over temperature shutdown, or no output due to the internal cause of the module.

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