Woodward 8200-188 723PLUS Digital Speed Control
Woodward 8200-188 is a premier digital speed control module belonging to the high-performance 723PLUS series.
It is a cornerstone of Woodward’s power management solutions, specifically designed to regulate the speed and load of large-bore reciprocating engines (diesel, gas, or dual-fuel) and gas/steam turbines.
Introduction
The 8200-188 is a High Voltage (90–150 VDC or 88–132 VAC) version of the 723PLUS Digital Speed Control.
Unlike its low-voltage counterparts, this unit is engineered for facilities where high-voltage DC battery banks or standard AC mains are the primary power sources.
It provides sophisticated control logic for isochronous speed control, droop, and complex load-sharing applications in power generation and mechanical drive systems.
Technical Parameter Table
| Parameter | Specification |
| Manufacturer | Woodward |
| Model Number | 8200-188 |
| Control Family | 723PLUS Digital Speed Control |
| Input Power (HV) | 90–150 VDC or 88–132 VAC (45–440 Hz) |
| Power Consumption | Approximately 12 Watts |
| Magnetic Pickup (MPU) | 1 to 60 Vrms (Speed Sensing) |
| Discrete Inputs | 8 Programmable (Optically Isolated) |
| Analog Inputs | 4 (Configurable 4–20 mA, 0–5 V, etc.) |
| Actuator Outputs | Dual 0–20 mA, 4–20 mA, or 0–200 mA |
| Operating Temp | -40°C to +70°C (-40°F to +158°F) |
| Communication Port | RS-422 Serial (9-pin D-sub) |
Unique Product Description
The Woodward 8200-188 is defined by its Dual Actuator Control Capability. This allows a single 723PLUS unit to manage two separate fuel banks on a large “V” engine or control both a fuel valve and a steam extraction valve on a turbine.
Its high-voltage power supply is internally isolated and exceptionally rugged, designed to ignore the significant “switching noise” common in industrial power grids and large-scale battery rooms.
Product Advantages and Features
Versatile Power Supply: Operates on either AC or DC high-voltage inputs without manual switching.
Precise PID Tuning: Offers separate dynamics for starting, rated speed, and dual-fuel transitions.
Complex Load Sharing: Integrates seamlessly with Woodward DSLC™ units via a dedicated load-sharing lines for proportional load distribution.
Digital Diagnostics: Built-in “Watch Window” compatibility allows technicians to view real-time engine data and fault logs.
EMI/RFI Resistance: Encased in a heavy-duty aluminum chassis to prevent electromagnetic interference in high-power environments.
8200-188
#Application Cases
Emergency Standby Power: Used in hospitals and data centers where high-voltage DC battery backups are standard.
Marine Power Management: Controlling main propulsion engines and auxiliary generators on large vessels.
Gas Compression: Governing engine speed for pipeline compressors in remote stations.
District Heating: Managing steam turbines in combined heat and power (CHP) plants.
Installation and Maintenance
Mounting: Install in a location with adequate airflow, avoiding direct contact with high-heat sources like exhaust manifolds.
High-Voltage Safety: Ensure all power is disconnected before touching terminals. The 8200-188 handles lethal voltages (up to 150V).
Shielding: To prevent “speed signal hunting,” ensure that the Magnetic Pickup (MPU) cable is shielded and grounded at the control end only.
Software Updates: Periodically check for Woodward “Custom Application” software updates to ensure the control logic matches modern engine efficiencies.
Other Models in the Same Series
Model Number Specification / Difference
8200-186 Low Voltage (18–40 VDC) Version
8200-187 High Voltage with Specific Software (Marine)
8200-226 Custom Configured 723PLUS
9907-205 Compatible Handheld Programmer
Related Models
Woodward 2301A/D (Standard Speed Control)
Woodward 505 (Steam Turbine Digital Control)
ProAct™ & UG-Series Actuators (Standard output pairing)
DSLC-2 (Digital Synchronizer and Load Control)