DS2020LPPB320A GE

Key Technical Parameters

Advantages & Features

• High-Voltage Primary Output – The DS2020LPPB320A delivers a regulated 120V primary output at 3.0A, providing 360W of power at higher voltage. This allows driving larger DC motors, high-voltage solenoids, and actuators that require 120V for efficient operation, significantly reducing current for a given power level and enabling much smaller gauge wiring.

• Dual Functionality – The DS2020LPPB320A eliminates the need for separate power supply and amplifier modules, reducing cabinet space, wiring complexity, and cost while improving system reliability.

• Versatile Auxiliary Outputs – In addition to the 120V primary output, the DS2020LPPB320A provides ±15V for analog circuits, 5V for digital logic, and optional 24V for additional I/O requirements, making it a complete power solution for turbine control subsystems that require mixed voltage levels.

• High Reliability for Continuous Duty – The DS2020LPPB320A is built with military-grade components and conformal-coated PCBs to withstand high vibration, humidity, and temperature swings common in turbine decks.

• Precision Voltage Regulation – Output voltage stability is within ±0.5% over the full load and temperature range, ensuring sensitive control electronics receive stable power for accurate measurements.

• Integrated Diagnostic Suite – Onboard LEDs indicate status (POWER, FAULT, COMM, OVERTEMP) and a 16-bit ADC provides real-time output voltage/current feedback to the main turbine controller (e.g., Mark VIe). This allows predictive maintenance without additional sensors.

• Hot-Swap Capable – The module supports live insertion/removal (with proper safety interlocks), minimizing downtime during routine servicing.

• Wide Input Range – Accepts both AC and DC input, making it versatile for retrofit projects where legacy power supplies are being upgraded.

• Efficiency > 91% at nominal load, reducing heat dissipation and extending the lifespan of nearby components.

Application Cases in Industry

1. Power Generation – 120V DC Motor Actuators

In a large combined-cycle power plant, the DS2020LPPB320A is used to provide regulated 120V power and amplification for DC motor-driven actuators in the fuel control and inlet guide vane systems. The higher voltage allows more efficient motor operation with lower current, reducing cable size and heat generation in the control cabinet.

2. Steam Turbine – High-Voltage Electro-Hydraulic Actuators with Integrated Motors

A large steam turbine installation uses the DS2020LPPB320A to drive 120V DC motors integrated into electro-hydraulic actuator assemblies. The 3.0A capacity provides sufficient torque for fast valve positioning during load changes and emergency shutdown events.

3. Oil & Gas – Long-Distance Actuator Control

An LNG facility uses the DS2020LPPB320A to power 120V actuators located at significant distance from the control cabinet. The higher voltage minimizes voltage drop over long cable runs, ensuring consistent actuator performance without the need for oversized cables.

4. Marine – 120V DC Thrust Control Motors

On a modern naval vessel, the DS2020LPPB320A provides power amplification for 120V DC motor-driven thrust control systems. The higher voltage reduces cable weight and size, a critical consideration in marine applications.

5. Retrofit Projects with 120V Legacy Systems

Many older turbine installations with 120V DC legacy actuators and motors are retrofitted with the DS2020LPPB320A to provide a modern, efficient, and diagnostic-capable power solution that is drop-in compatible with existing 120V field devices.

Comparison with Competitor Products

Key Differentiators:

• The DS2020LPPB320A is the only 120V primary output module in the LPP series that combines power supply and amplifier functions in a single unit, unlike ABB and Siemens offerings which require separate amplifier modules for actuator drive applications.

• The DS2020LPPB320A provides comprehensive auxiliary outputs (±15V, 5V, and optional 24V) whereas ABB provides only ±15V and Siemens provides none, eliminating the need for additional power modules.

• The DS2020LPPB320A has a superior MTBF of 115,000 hours, significantly higher than comparable ABB and Siemens power-only modules.

• The higher voltage (120V) of the DS2020LPPB320A enables efficient power transmission over long distances with minimal cable sizing, unlike 24V or 48V systems.

• However, Siemens’ SITOP PSU360-120 offers native Profibus communication at lower cost, whereas the DS2020LPPB320A requires an external gateway for Ethernet/IP or Modbus TCP.

Selection Suggestions

1. Verify Your Voltage Requirements – The DS2020LPPB320A is specifically designed for systems requiring a 120V primary output. If your actuators operate at 24V, select from the LPPA series. If they operate at 48V, consider the DS2020LPPB310A or DS2020LPPB312A.

2. Calculate Your 120V Power Requirements – The “320A” in the model suffix indicates 360W total power rating at 120V (3.0A). Calculate the total current consumption of all 120V devices. Do not exceed 3.0A continuous load. The module can handle peak currents of up to 4.5A for 100 ms.

3. Consider Cable Length Advantages – The 120V output at 3.0A allows using significantly smaller gauge cables than lower-voltage systems for the same power transmission. For runs up to 50 meters, 1.0 mm² (AWG 17) is sufficient, making the DS2020LPPB320A ideal for distributed actuator systems.

4. Identify Auxiliary Output Requirements – The DS2020LPPB320A provides ±15V (0.5A each), 5V (2.0A), and optional 24V (1.0A). Verify if your system requires these auxiliary voltages.

5. Verify Your Existing Control System – The DS2020LPPB320A is optimized for GE Speedtronic Mark V / Mark VIe platforms. If you are using a third-party PLC (e.g., Rockwell or Schneider), ensure you have an analog output card (±10 V) and can interface with the amplifier control signal inputs.

6. Thermal Considerations – The DS2020LPPB320A dissipates approximately 32W at full load. Ensure your cabinet has adequate ventilation and follow the derating curve: output power must be reduced by 1.5% per °C above 50°C ambient.

7. Safety Clearances – 120V DC systems require greater clearance and creepage distances than lower-voltage systems. Ensure your cabinet layout complies with applicable electrical safety standards.

8. Spare Parts Strategy – The DS2020LPPB320A has a typical lead time of 6–10 weeks. Stock the matching fiber-optic cables (GE part #FOT-LPPB), replacement fan (GE part #FAN-LPPB), and fuse kits.

9. Firmware Compatibility – Ensure your version of the Mark VIe Toolbox software is v6.0 or higher to recognize the diagnostic registers specific to the DS2020LPPB320A module.

Precautions for Installation & Maintenance

• ESD Protection – The DS2020LPPB320A contains sensitive MOSFETs and control ICs. Always wear a grounded wrist strap and use an anti-static workstation when handling the board. The high-voltage components require additional care to prevent damage.

• Power Sequencing – Always apply control power (24 VDC logic supply) before enabling the main AC/DC input. Powering the main bus first can cause uncontrolled outputs and damage connected actuators.

• Load Connection – Always connect loads to the DS2020LPPB320A outputs before applying power. Disconnecting a load under power can cause voltage spikes that may damage the module or connected devices.

• 120V Safety Precautions – 120V DC is considered a hazardous voltage. Ensure all cables and connectors are rated for 150V minimum. Observe proper insulation, clearance, and creepage distances. Install appropriate warning labels on panels containing this module.

• Analog Control Inputs – The amplifier section accepts a ±10 V differential analog input. Use shielded twisted-pair cables for runs longer than 10 meters to avoid noise pickup. The high-voltage switching can generate EMI; proper shielding is essential.

• Grounding – Connect the earth lug directly to the system ground bus with a 6 mm² (AWG 10) wire. Do not daisy-chain grounds. The 120V output shares a common ground with auxiliary outputs; ensure proper grounding to avoid ground loops.

• Periodic Inspection – Check electrolytic capacitors for bulging or leakage every 6 months. The DS2020LPPB320A uses 105°C-rated capacitors for improved reliability. Clean the cooling fan filter regularly.

• Commissioning Test – Perform a “no-load” test to verify all output voltages. Then connect a dummy resistive load (40 Ω, 360W) and test the amplifier response with a 0–10 V ramp signal. Verify the 120V output is stable and within regulation.

• Firmware Updates – Only use GE’s official flasher tool via the JTAG port. The DS2020LPPB320A has specific firmware for the 120V output stage.

• Fuse Replacement – Use only specified fuses: 3.15A fast-blow input fuses (GE part #FUSE-LPPB-320A) and 4A slow-blow output fuses. Using incorrect fuses can compromise protection or cause safety hazards.

• Cable Sizing – The 120V output at 3.0A allows smaller gauge cables. Minimum recommended cross-section is 1.0 mm² (AWG 17) for runs up to 10 meters, with 1.5 mm² (AWG 15) for runs up to 50 meters. Ensure cables are properly insulated for 150V minimum.

• EMI Considerations – The high-voltage switching in the DS2020LPPB320A can generate electromagnetic interference. Route output cables away from sensitive analog and communication lines. Use shielded cables where necessary.

Summary

The DS2020LPPB320A is a high-voltage, high-reliability 120V power supply and amplifier module that combines multiple functions into a single 6U Eurocard format. Its primary strengths lie in its 360W power capacity at 120V , comprehensive auxiliary outputs (±15V, 5V, and optional 24V), integrated amplifier for actuator control, hot-swap capability, and dual-input AC/DC versatility.

The DS2020LPPB320A is the preferred choice when a system requires 120V actuator drive for efficient motor or solenoid operation. It is ideal for applications with long cable runs where higher voltage reduces voltage drop, DC motor-driven actuators, and retrofits of legacy 120V equipment. The 3.0A capacity is sufficient for most high-voltage actuator applications, and the module’s comprehensive auxiliary outputs eliminate the need for additional power supplies.

For new installations, pair it with a Mark VIe controller for seamless integration. For retrofits, carefully plan your interface connections, grounding scheme, and safety clearances. When properly specified, installed, and maintained, the DS2020LPPB320A delivers over a decade of reliable service in the harshest power generation and industrial environments, making it a trusted solution for high-voltage actuator control applications worldwide.