Woodward 9906-619

Technical Dossier

Product Details And Specifications

Woodward 723 PLUS Series Technical Notes

723 PLUS Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the Woodward 723 PLUS series, classified by primary function:

Speed/Load Controllers (Core Governor Units)

• 9906-619: 723 PLUS Digital Control, standard speed/load governor, 8 analog inputs, RS-422 comm port, 24 VDC power supply input.
• 9906-620: 723 PLUS Digital Control, enhanced I/O configuration, dual MPU input channels, extended temperature rating.
• 9906-621: 723 PLUS with integrated load sharing module, designed for parallel generator set applications.
• 9906-622: 723 PLUS Digital Control, high-voltage actuator output variant (up to 200 mA), for EG-type actuators.
• 9906-623: 723 PLUS with expanded analog output channels, used in compressor anti-surge control configurations.
• 9906-624: 723 PLUS Digital Control, ATEX/hazardous area certified variant for offshore and refinery installations.

Communication & Interface Modules

• 9906-625: 723 PLUS with Modbus RTU communication option, enables SCADA integration over RS-485 network.
• 9906-626: 723 PLUS with DeviceNet adapter interface, for integration into Allen-Bradley PLC-based control architectures.
• 9906-627: 723 PLUS with PROFIBUS DP slave interface, common in Siemens DCS environments (Simatic S7 integration).

Power Supply & Auxiliary Modules

• 9906-628: 723 PLUS auxiliary power supply board, 115/230 VAC input, internal DC bus regulation for main control card.
• 9906-629: 723 PLUS redundant power supply module, hot-standby configuration for critical turbine applications.

I/O Expansion Modules

• 9906-630: 723 PLUS digital input expansion card, adds 16 discrete 24 VDC inputs for external permissive and shutdown logic.
• 9906-631: 723 PLUS analog output expansion, adds 4 × 4–20 mA outputs for valve positioner and indicator drives.
• 9906-632: 723 PLUS thermocouple input module, supports J/K/T type TCs for exhaust temperature monitoring.
• 9906-633: 723 PLUS RTD input module, 3-wire PT100 configuration, used in bearing temperature protection loops.

Replacement & Repair Components

• 9906-634: 723 PLUS main processor board (PCB assembly), direct replacement for failed CPU card without full unit replacement.
• 9906-635: 723 PLUS display and keypad assembly, front-panel replacement for units with failed HMI interface.

Quality Control for the 723 PLUS Range

The 723 PLUS platform uses a proprietary backplane bus architecture connecting the main processor card to I/O expansion modules. Standard bench testing procedures are insufficient for validating inter-card communication integrity. DriveKNMS applies a dedicated test protocol for 723 PLUS units that includes: (1) Power-on self-test (POST) verification with serial terminal monitoring of diagnostic output; (2) MPU signal simulation at calibrated frequencies (0–10,000 Hz) to verify speed channel linearity and overspeed trip setpoint accuracy; (3) Analog I/O calibration check across full 4–20 mA range using precision current source and meter; (4) Actuator output load test at rated current with waveform capture to detect driver stage degradation; (5) RS-422/RS-485 communication loopback test at 9600 and 19200 baud; (6) EEPROM read/write cycle verification to confirm non-volatile storage integrity; (7) Thermal soak at 55°C for 2 hours to screen latent component failures. Units passing all stages are issued a DriveKNMS test certificate with date, technician ID, and measured values.