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  • New item   Smart AC/DC Telecommunications Power Supply | Rack-Mount | 2400W | 230VAC | -42...-58VDC | RS232 / RS485 / SNMP | 440x320x44mm | IP20
    New item   Smart AC/DC Telecommunications Power Supply | Rack-Mount | 2400W | 230VAC | -42...-58VDC | RS232 / RS485 / SNMP | 440x320x44mm | IP20 1
    New item   Smart AC/DC Telecommunications Power Supply | Rack-Mount | 2400W | 230VAC | -42...-58VDC | RS232 / RS485 / SNMP | 440x320x44mm | IP20 2

    Smart AC/DC Telecommunications Power Supply | Rack-Mount | 2400W | 230VAC | -42...-58VDC | RS232 / RS485 / SNMP | 440x320x44mm | IP20

    Code: ES-E4840-I
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    Compact 19-inch, 1U AC/DC telecommunications power supply system designed to power communications, data transmission, and wireless base station equipment. The system converts 230 V AC into an adjustable –42 to –58 V DC output (nominal –53.5 V DC) and, when equipped with two 1200 W rectifier modules, provides up to 2400 W of output power. The integrated controller supports RS232, RS485, and SNMP communication, enabling remote monitoring of system status and alarms. 

  • Product description

    Rack-mount smart AC/DC telecommunications power supply – 19-inch, 1U, 2400 W, –53.5 V DC

    Rack-mount AC/DC DC power supply is intended to power telecommunications, transmission, wireless base-station and enterprise communication equipment. The system converts 230 V AC single-phase voltage into an adjustable –42...–58 V DC output voltage with a nominal value of –53.5 V DC.

    The compact 1U-high enclosure accommodates up to two 1200 W rectifier modules. When both modules are used, the maximum system output power reaches 2400 W. The modular design allows the power capacity to be adapted to the specific load and simplifies maintenance.

    The system is installed in a standard 19-inch telecommunications rack or another suitably sized technical enclosure. The integrated controller monitors power, batteries and environmental signals, supports remote management through serial or network interfaces and can transmit alarms via dry-contact outputs.

    Modular 1U system:
    The enclosure can accommodate up to two 1200 W rectifier modules. With both modules installed, the total system power reaches up to 2400 W, while the compact 1U format saves rack space.
    Remote monitoring and control:
    The controller supports RS232, RS485 and SNMP communication. System status, alarms, environmental sensor signals and other controller-supported information can be transmitted through the communication interfaces.
    For professional installation:
    This is telecommunications and industrial power equipment. Connection to the 230 V AC supply, DC loads, batteries and protection circuits must be carried out by a qualified specialist in accordance with the project wiring diagram.
    Mounting format
    19-inch, 1U
    Maximum power
    2400 W
    AC input
    230 V AC, single-phase
    DC output
    –42...–58 V DC
    Nominal output voltage
    –53.5 V DC
    Rectifier modules
    Up to 2 × 1200 W
    Protection rating
    IP20
    Communication interfaces
    RS232 / RS485 / SNMP

    AC/DC power conversion

    The system accepts 230 V AC single-phase input voltage and converts it through the rectifier modules into negative-potential DC voltage used by telecommunications equipment. The adjustable output range is –42...–58 V DC, while the nominal output voltage is –53.5 V DC.

    This output-voltage range is designed for telecommunications equipment and battery-backup systems using a nominal –48 V DC power architecture.

    Negative-potential designation:
    Before connecting the load, the system polarity must be verified. The –53.5 V DC designation indicates a negative-potential power system, so incorrect wiring may damage the powered equipment.

    Up to 2400 W output power

    The system has two positions for 1200 W rectifier modules. With both modules installed, the maximum total system output power reaches 2400 W.

    The modular architecture allows the system to start with a lower power rating and be expanded with a second rectifier module when required. Power reserve or partial redundancy in the event of a single-module failure may also be configured, but the actual redundancy logic depends on the system configuration and load.

    Easily replaceable rectifier modules

    The modules can be removed and replaced without shutting down the entire system, provided that the remaining modules can safely supply the connected load.

    This hot-swap capability simplifies servicing at telecommunications sites where minimising power interruption is important. Front maintenance access allows the modules to be reached from the front of the rack.

    Replacement while the system is operating:
    Before removing a module, make sure that the remaining rectifier or battery system can support the entire load. Modules must be replaced by qualified technical personnel.

    High rectifier efficiency

    Depending on the selected rectifier-module version, efficiency is specified as greater than 92% , while the highest-efficiency version has a peak value above 96% .

    Higher conversion efficiency reduces energy losses, heat generation and cooling demand. This is particularly important in telecommunications racks containing several heat-generating devices.

    Rectifier standby and sleep function

    The controller can optimise rectifier operation according to the connected load. When power demand is low, an unnecessary module can be switched to a lower-consumption standby or sleep mode.

    As the load increases, the additional module can be reactivated. This helps maintain a more efficient system operating point and reduce unnecessary energy consumption.

    Smart battery management

    The system includes battery-circuit protection and management functions. Two 20 A battery fusesare provided to protect the backup-power circuits.

    Smart battery management can be used to monitor charging, discharging, temperature and alarm status. The controller has a separate battery-temperature sensor input.

    DC distribution

    The DC distribution section includes two 40 A load fuses and two 20 A battery fuses. The fuses help protect individual load and backup-power circuits against overcurrent.

    Fan power outputs are provided for two fan channels. The system controller also has separate alarm inputs for the first and second fans.

    Fuse rating is not the permitted continuous load:
    Circuit cables, terminals, connections and loads must be selected according to the design current. It must not be assumed automatically that every branch protected by a 40 A fuse is intended for a continuous 40 A load.

    Surge protection

    The AC input section includes a surge protection device with specified parameters of 20 kA / 40 kAat an 8/20 μs impulse waveform.

    The protection helps reduce the effect of transient mains overvoltages on the rectifiers and the connected DC system.

    Surge-protection coordination:
    The integrated protection device does not replace the staged surge-protection system for the entire site. Protection of building switchboards, earthing and equipotential bonding must be designed according to the requirements of the specific installation.

    Integrated controller with LCD display

    The system controller has an LCD displayfor viewing the main operating parameters, statuses and alarms. The controller monitors the condition of the rectifiers, batteries, environmental signals and other connected circuits.

    The controller can be used to set system parameters, review alarms and configure communication functions. The specific menu functions and adjustable parameters must be checked against the controller manual.

    Environmental and alarm-signal monitoring

    The controller includes several digital and sensor inputs for monitoring not only the power system but also the environmental conditions inside the telecommunications rack.

    Signal inputs:
    • 1 battery-temperature input.
    • 1 ambient-temperature input.
    • 1 smoke-detector input.
    • 1 door or gate status input.
    • 1 water-leak detector input.
    • 2 general-purpose digital inputs.

    The system alarm interface also includes first-fan, second-fan, door and smoke signals. The controller has four dry-contact alarm outputs that can be connected to a building-management, alarm or remote-monitoring system.

    RS232, RS485 and SNMP communication

    The controller supports RS232 and RS485 serial interfaces as well as SNMP remote network-monitoring functionality.

    These interfaces allow the power system to be integrated into a telecommunications-site management platform for remote alarm monitoring and operating-parameter analysis.

    Natural system cooling

    The main 1U system enclosure is specified with natural cooling. Individual rectifier modules use forced cooling to help maintain a suitable electronics temperature under higher load.

    When installed in a telecommunications rack, the air intake and exhaust openings must remain unobstructed. Inadequate airflow may reduce the permissible power and shorten equipment service life.

    Wide ambient-temperature range

    The complete system is specified for an –40...+80 °C operating ambient temperature. The storage-temperature range is –40...+70 °C.

    The operating-temperature and full-load limits of the rectifier modules depend on the selected module version. One version is specified for operation from –40 to +85 °C with full load maintained up to +55 °C, while another operates from –40 to +80 °C with full load maintained up to +50 °C.

    Power derating may be required:
    An operating temperature of up to +80 °C does not mean that the system can continuously operate at the maximum 2400 W throughout the entire range. Power derating may apply above the rectifier's full-load temperature limit.

    19-inch, 1U installation

    The system enclosure dimensions are 440 × 320 × 44 mm. A height of approximately 44 mm corresponds to the 1U mounting format, so the system occupies only one standard rack unit.

    The device can be installed in a 19-inch rack or inside a technical cabinet. Front servicing and front cable entry and exit simplify access in densely populated racks.

    Mounting depth:
    Although the enclosure depth is 320 mm, additional space must be allowed for cable bend radius, connector positions, airflow and maintenance access.

    Technical specifications

    System
    Product type Rack-mount AC/DC telecommunications power system
    Mounting format 19-inch rack or technical cabinet, 1U
    Enclosure dimensions 440 × 320 × 44 mm
    System weight Not more than 6 kg
    System cooling Natural
    Maintenance access From the front
    Cable connection Front cable entry and exit
    Protection rating IP20
    Alarm interfaces 2 fan, door and smoke signals
    AC input and distribution section
    Input voltage 230 V AC, single-phase
    AC input connection 1 × 32 A / 2P or terminals
    Input-frequency range 45–66 Hz
    Nominal frequency 50 / 60 Hz
    Surge protection 20 kA / 40 kA, 8/20 μs
    DC output and distribution section
    Adjustable output voltage –42...–58 V DC
    Nominal output voltage –53.5 V DC
    Maximum system power 2400 W
    Battery fuses 2 × 20 A
    Load fuses 2 × 40 A
    Fan power supply 2 fan channels
    Rectifier modules
    Number of modules Up to 2
    Nominal power per module 1200 W
    Rectifier input voltage 85–300 V AC, nominal 230 V AC
    Efficiency More than 92% or a peak value above 96%
    Power factor Not less than 0.99
    Total harmonic distortion Not more than 5%
    Rectifier dimensions 70.3 × 253 × 42.5 mm
    Weight of one rectifier Not more than 1 kg
    Rectifier cooling Forced
    Module replacement Replaceable without shutting down the power system
    Controller
    Signal inputs Battery temperature, ambient temperature, smoke, door, water and 2 general-purpose digital inputs
    Alarm outputs 4 dry-contact outputs
    Communication interfaces RS232, RS485, SNMP
    Display LCD
    Environmental conditions
    System operating temperature –40...+80 °C
    Storage temperature –40...+70 °C
    Operating relative humidity 5–95%, non-condensing
    Installation altitude 0–2000 m above sea level

    Main features

    • AC/DC conversion for telecommunications equipment.
    • –42...–58 V DC adjustable output.
    • –53.5 V DC nominal output voltage.
    • Up to 2400 W total system power.
    • Up to two 1200 W rectifier modules.
    • High-efficiency power conversion.
    • Rectifier standby and sleep function.
    • Smart battery management.
    • 2 × 20 A battery fuses.
    • 2 × 40 A load fuses.
    • Integrated surge protection.
    • LCD controller display.
    • RS232, RS485 and SNMP communication.
    • 4 dry-contact alarm outputs.
    • Ambient temperature, smoke, door and water monitoring.
    • 19-inch, 1U installation.
    • Front maintenance access.
    • IP20 enclosure.
    • –40...+80 °C system operating temperature.

    Applications

    For wireless base stations
    For powering –48 V DC radio, mobile-network and base-station equipment.
    For data-transmission networks
    For powering optical and other communications-transmission equipment.
    For enterprise communication networks
    For enterprise telecommunications racks, routing equipment and telecommunications equipment.
    For outdoor telecommunications cabinets
    Only when installed in a climatic or technical cabinet with a suitable protection rating.
    For access-control and security systems
    For communications and control equipment using a –48 V DC architecture.
    For telecommunications nodes
    For centralised power supply, backup and remote monitoring.

    Installation and commissioning procedure

    1. Check the system configuration. Confirm how many rectifier modules are installed and the actual system power.
    2. Assess the load. Calculate the continuous and maximum power of the connected equipment.
    3. Select the installation location. The 19-inch rack must provide sufficient depth, airflow and maintenance space.
    4. Secure the 1U enclosure. Use fasteners suitable for the rack construction.
    5. Connect protective earthing.
    6. Connect the 230 V AC input. Check the phase, neutral, protective conductor and protective-device connections.
    7. Connect the DC load circuits. Strictly observe the polarity of the –53.5 V DC system.
    8. Connect the battery circuits. Use correctly selected cables, fuses and a suitable battery bank.
    9. Connect environmental sensors and alarms. If they are used in the project.
    10. Connect the communication interface. Configure RS232, RS485 or SNMP communication.
    11. Start the system without the full load. Check the LCD display, alarms and output voltage.
    12. Connect the load in stages. Monitor rectifier current, voltage and temperature.
    13. Check backup operation. If batteries are connected, safely verify the system transfer to backup power.
    Before connecting telecommunications equipment:
    Measure the actual DC output voltage and verify polarity. Incorrect wiring in a negative-potential system may irreversibly damage the load.

    Recommendations for use and safety

    • AC and DC connections must be carried out by a qualified specialist.
    • Disconnect the AC input and battery circuits before starting work.
    • Verify the polarity of the –53.5 V DC system.
    • Do not exceed the actual power of the installed rectifiers.
    • Do not obstruct the air intake and exhaust openings.
    • Keep the front maintenance area clear.
    • Use cables with a cross-section suitable for the design current.
    • Use only compatible rectifier modules.
    • Connect batteries through the designated protection circuits.
    • Do not exceed the 5–95% humidity range and prevent condensation.
    • Do not use the IP20 enclosure directly outdoors or in a damp environment.
    • Monitor alarms and do not operate the system with a persistent fault indication.
    • Do not modify the protection, earthing or control circuits without an approved design.

    Maintenance

    • Regularly check rectifier status and alarms.
    • Clean dust and dirt from the air openings.
    • Check fan operation.
    • Monitor the temperature of AC input and DC output connections.
    • Check the tightness of terminals and fasteners.
    • Periodically check battery voltage, temperature and condition.
    • Check the indication of the surge-protection device.
    • Test the dry-contact alarm outputs.
    • Check remote communication and SNMP notification operation.
    • After replacing a module, check that it is recognised and shares the load correctly.

    FAQ – frequently asked questions

    What is the maximum system power?
    Up to 2400 W when two 1200 W rectifier modules are installed.
    Can 2400 W be achieved with one module?
    No. The nominal power of one module is 1200 W.
    What is the system output voltage?
    Adjustable from –42 to –58 V DC, with a nominal value of –53.5 V DC.
    What input voltage is required?
    The system is specified for a 230 V AC single-phase input. The operating input range of the rectifier modules is 85–300 V AC.
    Is the system installed in a standard telecommunications rack?
    Yes. It is designed for a 19-inch rack and occupies 1U.
    What are the system dimensions?
    440 × 320 × 44 mm.
    Can the rectifier modules be replaced while the system is operating?
    Yes, provided that the remaining system can support the load.
    Does the system include battery management?
    Yes. Smart battery-management and protection functions are provided.
    Which remote communication interfaces are supported?
    RS232, RS485 and SNMP.
    Can the cabinet environment be monitored?
    Yes. The controller has inputs for temperature, smoke, door, water and general-purpose digital signals.
    Does the system have alarm outputs?
    Yes. Four dry-contact alarm outputs are provided.
    What is the protection rating?
    IP20, so the system must be installed in a dry technical room or in a cabinet with a suitable protection rating.
    What temperature range can the system operate in?
    The specified system operating temperature is –40...+80 °C, but load derating may be required at high temperatures.
    Can the system be installed outdoors?
    Not directly. The IP20 enclosure must be installed in a suitable outdoor technical cabinet protected against water, dust and condensation.

    Compact 1U DC power system for telecommunications equipment

    The rack-mount AC/DC power system is designed for wireless base stations, transmission networks, enterprise communications infrastructure and other equipment using a –48 V DC architecture.

    The system accepts 230 V AC single-phase voltage and supplies an adjustable –42...–58 V DC output. The nominal output voltage is –53.5 V DC, and the maximum power reaches 2400 W when two 1200 W rectifier modules are used.

    The integrated LCD controller supports RS232, RS485 and SNMP communication, four dry-contact alarm outputs and monitoring of temperature, smoke, door, water and other signals.

    The 440 × 320 × 44 mm enclosure is installed in a 19-inch rack and occupies only 1U. Front servicing and front cable connections simplify system installation and maintenance in a telecommunications rack.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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