Digital guide

You are here:
  1. Home
  2. Woodward
  3. Woodward 9906-719

Woodward 9906-719

Product Name:​ 723PLUS Digital Speed Governor Controller (General-Purpose Generator Set Firmware Version)
Product Introduction:​ Microprocessor-based engine speed and load digital controller manufactured by Woodward. The hardware body carries no application logic; ships with general-purpose diesel / gas generator set control firmware preloaded for closed-loop speed regulation of reciprocating internal combustion engines and parallel operation load distribution. Adapts to magnetic speed probe MPU or proximity switch speed input. Widely used in industrial power generation control systems.
WhatApp
WeChat

Detailed content

Technical Specifications:
  • Power supply: DC 18–40 V (nominal 24 V / 32 V), low-voltage hardware version
  • Rated power consumption: 40 W
  • Surge current: 7 A, duration 0.1 ms
  • Speed input channels: 2 channels, input voltage 1–50 Vrms, frequency range 30 Hz–15 kHz, input impedance 10 kΩ
  • Analog input: 4 channels, supports ±5 V DC / 0–20 mA signals, full-scale accuracy 0.5%
  • Analog output: 3 channels, 4–20 mA configurable
  • Discrete input: 8 channels, 24 Vdc logic, 10 mA per channel
  • Discrete output: 3 channels relay output
  • Serial communication: RS-232, RS-422 dual serial ports, supports LON and Modbus protocols
Functional Features:
  • Is speed and droop regulation modes, supports multi-unit analog bus or LON network load sharing
  • Built-in soft load / soft unload logic, automatic generator breaker control
  • Start fuel limiting, boost pressure fuel limiting protection logic
  • Complete self-diagnostics monitoring CPU, memory, reference power in real time, fault code output
  • Parameters stored in non-volatile memory, configuration retained after power loss
  • Supports handheld programmer and PC-end Watch Window software online parameter setting, service menu parameters modifiable during unit operation
Application Scenarios:​ Land-based diesel / gas generator sets, backup power stations, factory self-contained power plants; speed governing for diesel, gas, and dual-fuel reciprocating engines; can be paired with DSLC digital synchronizer for automatic synchronization and grid connection.
Performance Parameters:​ Operating environment temperature −40 °C to +70 °C; storage temperature −55 °C to +105 °C; relative humidity 95% non-condensing; steady-state speed regulation accuracy better than 0.25% of rated speed.
Material Composition:​ Housing is cold-rolled steel sheet metal enclosure, internal multi-layer industrial-grade PCB, connectors are D-SUB 9-pin connectors and screw-type terminal blocks.
Structural Features:​ Fully enclosed metal enclosure, single main control circuit board built in, enclosure with communication port access cover; 3 groups of 9-pin D-SUB interfaces and 3 groups of terminal blocks all arranged on the same side of the device for easy cabinet wiring.
Installation Requirements:
  • Control cabinet panel flush-mount installation; direct mounting on engine body is prohibited to avoid strong vibration
  • Installation location must ensure ventilation and heat dissipation, away from high-power contactors, variable frequency drives and other strong electromagnetic interference sources
  • Speed signals and analog signals must use shielded twisted pair cable, shield single-point grounded
  • Reserve side maintenance space for wiring and programming cable plugging
  • Power supply must use stabilized battery power, not directly from unstable generator output

You may also like