WOODWARD 2301E 8273‑1011 is a microprocessor-based digital load sharing and speed control unit designed for ordinary locations, developed by Woodward. It inherits the mature hardware framework of the 2301 series, fully realizing all control logics of legacy 2301A and 2301D while expanding digitalized functions. The 2301E 8273‑1011 targets generators driven by diesel and gaseous engines, also applicable to speed regulation of pumps and compressors. Configuration of the 2301E 8273‑1011 relies on Control Assistant and ToolKit software on external PC, with built-in Modbus RTU slave communication via RS422 for industrial control system integration. 

Four switchable operation modes support single unit, parallel genset and grid-tied scenarios, embedded soft load/unload logic eliminates grid connection impact. This unit adopts single PCB metal sheet chassis, total weight 1.75kg with 24 Vdc power supply, widely used in land-based power stations without explosion-proof requirements. Its explosion-proof counterpart 8273‑1012 shares identical I/O hardware but holds ATEX Zone 2 certification. As a mainstream digital controller for small and medium genset parallel control, the 2301E 8273‑1011 features abundant debugging documents and excellent compatibility, enabling direct replacement of old analog governors without modifying mounting holes during retrofitting projects.

Electrical Specifications

Power Supply: 18–36 Vdc, nominal power consumption ＜20W, steady-state current 0.43A, peak surge current 7A (100ms)

Actuator Drive Output: Software selectable 4–20mA / 0–20mA / 0–200mA / PWM, max output 200mA

MPU Speed Input: Frequency range 100–24950Hz, input voltage 1.7–35Vac, compatible with all magnetic pickup sensors

Analog Channels: 2 configurable analog inputs, 1 configurable analog output, standard 4–20mA signal

Discrete Channels: 8 passive switch inputs, 4 solid-state relay driver outputs, single channel max load 200mA

Power Detection Circuit: 3-phase PT voltage input 90–240Vac, 3-phase CT current input 0–7.2A, built-in load calculation circuit

Communication Ports: 9-pin RS232 (local configuration), RS422 (Modbus RTU slave, baud rate 9600–115200 adjustable)

Environmental & Mechanical Specifications

Operating Temperature: -40℃ ~ +70℃; Storage Temperature: -40℃ ~ +105℃

Enclosure Rating: Ordinary location metal cabinet without explosion-proof protection; 8273‑1012 supports ATEX Zone 2 hazardous area

Total Weight: 1.75kg (3.86lb)

Compliance Certifications: CE EMC & Low Voltage Directive; Marine Certificates ABS, BV, CCS, DNV, LR, NK; CSA Class I Division 2 Safety Certification

Vibration Standard: Compliant with MIL‑STD 810C shock & vibration criteria

Integrated single PCB metal sheet chassis with modular structure, easy disassembly and maintenance, resistant to industrial dust and electromagnetic interference.

Isolated dual serial ports separate local RS232 debugging and RS422 Modbus communication; short circuit of communication lines will not trigger controller shutdown protection.

Spring self-locking terminals fit various cable gauges, consistent tightening torque avoids loose connection and overheating after long-term operation.

Internal load sensor circuit eliminates external power transducer; active power is directly calculated via PT and CT signals to simplify system wiring.

Actuator output supports forward/reverse action software switch, compatible with forward and reverse fuel actuators without hardware rewiring.

Dual dynamic parameter groups switch automatically via external discrete inputs, independent PID tuning for idle and rated speed to balance low-speed stability and high-speed response.

Idle droop function reduces fuel supply fluctuation at low speed to eliminate engine idle shaking.