Woodward 8273-140 2301D Digital Load Sharing & Speed Control Module

Key Features

  • Microprocessor-Based Control: Ensures precise speed regulation and load sharing with steady-state accuracy to optimize engine efficiency.
  • Dual Serial Ports: RS-232/RS-422 enable PC-based configuration, data logging, and remote monitoring for operational flexibility.
  • PWM Actuator Output: Low-current PWM signal directly drives fuel/air actuators for responsive engine control.
  • Soft Load Transfer: Prevents voltage/frequency transients during generator on/off-load transitions to protect electrical loads.
  • Multiple Dynamic Adjustments: Configurable parameters for acceleration, deceleration, and load response to match pump/compressor dynamics.
  • Automatic Idle Function: Reduces engine speed during no-load periods to lower fuel consumption and wear.
  • Legacy Compatibility: Direct replacement for 8273-101 with identical mounting/wiring to minimize retrofit costs.
  • Hazardous Location Rating: Class 1, Division 2 certification for safe operation in petrochemical/refinery environments.
Category:
Description

Technical Specifications

Parameter Details
Product Series 2301D Digital Load Sharing & Speed Controls
Power Supply 18–40 Vdc (nominal 24 Vdc); max current 0.589 A; max power consumption 14 W
Speed Sensing Magnetic pickup (MPU) input; frequency range 30–300 Hz (900–3600 rpm for 2-pole generators); speed regulation accuracy ±0.25% steady-state
Actuator Output 1×low-current PWM output (24 Vdc, 800 mA max) for fuel injectors/throttle actuators
Analog I/O 2×analog inputs (0–5 Vdc for remote speed/load reference); 1×4–20 mA load share output for parallel generators
Serial Communication RS-232 and RS-422 ports for configuration via PC software; supports Woodward’s serial protocol for data logging
Discrete I/O 4×discrete inputs (24 Vdc, 800 mA max) for start/stop, idle, load transfer; 2×Form-C alarm/trip relays (5 A @ 250 Vac/30 Vdc)
Operating Temperature -40°C to 70°C (-40°F to 158°F); storage: -40°C to 85°C (-40°F to 185°F)
Relative Humidity Up to 95% (non-condensing); Pollution Degree 3
Certifications CE, UL, Class 1, Division 2 hazardous location compliant
Physical Form Factor Metal-base PCB module; dimensions 152 mm × 102 mm × 51 mm; weight approx. 1.95 kg (4.30 lbs)
Load Sharing Proportional load sharing accuracy ±1% between parallel generators

Functional Capabilities

  • Speed Regulation: Maintains set speed under varying loads with ±0.25% steady-state accuracy to ensure stable power output.
  • Parallel Load Sharing: Distributes load proportionally between multiple generators via 4–20 mA current sharing to balance system load.
  • Remote Reference Control: Accepts 0–5 Vdc analog inputs for remote speed/load adjustment from SCADA or PLC systems.
  • Event Logging: Time-stamps start/stop cycles, load changes, and fault events (sensor loss, overcurrent) for post-incident analysis.
  • Idle/Run Mode Switching: Automatically shifts between idle and rated speed based on load demand to optimize efficiency.
  • Overload Protection: Integrates torque and manifold pressure (MAP) limiters to prevent engine damage during peak loads.
  • Load Shedding: Triggers discrete outputs to shed non-critical loads when exceeding user-set load thresholds.

Application Scenarios

  • Diesel/Gas Generator Sets: Controls parallel generators in data centers, hospitals, and industrial backup power systems for load sharing and frequency stability.
  • Pump/Compressor Drives: Regulates engine speed for water treatment pumps, natural gas compressors, and industrial process pumps to match flow/pressure demands.
  • Marine Propulsion Engines: Manages speed and load for shipboard diesel engines, ensuring stable operation during dynamic sea conditions.
  • Petrochemical Refineries: Operates in Class 1, Division 2 areas to control process heaters and gas compressors with hazardous gas exposure.
  • Power Plant Auxiliaries: Controls auxiliary engines for boiler feed pumps, cooling fans, and air compressors in thermal power plants.
  • Legacy System Retrofits: Replaces outdated mechanical governors with minimal wiring changes to upgrade engine control without full system overhauls.

Configuration & Maintenance

  • PC-Based Programming: Uses Woodward’s 2301D configuration software via RS-232/RS-422 to set speed thresholds, load share gains, and dynamic parameters.
  • Parameter Lockout: Password-protected access prevents unauthorized changes to critical settings (speed, load limits, relay logic).
  • MPU Calibration: Auto-calibrates to MPU frequency (30–300 Hz) for accurate speed measurement; detects signal loss to trigger alarms.
  • Serial Data Logging: Captures speed, load, and fault data at 1 Hz intervals for performance analysis and compliance reporting.
  • Module Replacement: Hot-swappable design allows replacing the PCB without engine shutdown, reducing maintenance downtime.
  • Diagnostic LEDs: Front-panel LEDs indicate power status, MPU signal health, relay activation, and communication connectivity for quick troubleshooting.
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