WOODWARD 8701-758 5601-1126 Used in digital speed control systems and turbine governors
The Woodward 8701-758 and 5601-1126 are professional-grade industrial control components typically utilized in Digital Speed Control Systems and Turbine Governors.
These two part numbers are frequently paired together, representing a specific controller module (8701-758) and its associated digital interface or display panel (5601-1126).
Technical Parameter Table
| Parameter | Specification |
| Model Numbers | 8701-758 (Controller) / 5601-1126 (Interface) |
| Type | High-performance Current-to-Pressure (I/P) / Digital Governor |
| Input Voltage | 12 VDC or 24 VDC (Nominal) |
| Pressure Range | 3–15 PSI (20.5–103.4 kPa) |
| Maximum Flow Rate | 25 SCFM (70.5 SLPM) |
| Communication | RS-232 / RS-485 Serial Interface |
| Operating Temp | -40°C to +85°C |
| Body Material | Heavy-duty Aluminum |
| Protection Rating | IP54 / IP56 (Application dependent) |
Related Models
These components are often found in systems alongside:
8237-1600: ProTech-GII Overspeed Detection.
8200-1300: 505 Series Digital Governor.
9907-162: 505 Digital Turbine Control.
EASYGEN-3500: Power Management/Parallel Generator Controller.
Application Cases
Petrochemical Refineries: Managing the signal conversion for pneumatic actuators in fuel lines to ensure stable combustion.
Power Generation: Precise speed regulation for steam and gas turbines to maintain grid frequency synchronization.
Steel & Mining: Control of large boiler fans, induced draft fans, and circulating pumps to optimize energy consumption.
Maritime Propulsion: Engine speed control and load sharing for large-scale vessel diesel engines.
Product Advantages and Features
High-Precision Conversion: Provides exceptionally accurate current-to-pressure conversion, essential for sensitive valve positioning.
Ruggedized Design: The cast aluminum body is resistant to vibration and extreme temperatures, making it suitable for turbine skids.
Signal Stability: Features integrated filtering to minimize the effects of electromagnetic interference (EMI) and torsionals in reciprocating engines.
Triple Modular Potential: Often integrated into Woodward’s redundancy architectures to prevent single-point failures in critical safety loops.
Other Models in the Same Series
8701-757 / 8701-759: Alternate pressure range variants.
5601-1125: Standard Interface Panel (Non-backlit).
9905-973: 2301A Series Load Sharing and Speed Control.
8440-1884: easYgen series generator set controllers.
Introduction
The Woodward 8701-758 and 5601-1126 constitute a robust digital control interface solution designed for the demanding requirements of industrial prime movers.
While the 8701-758 focuses on high-precision signal processing and conversion (ensuring that electrical commands from the DCS are accurately translated into mechanical or pneumatic action), the 5601-1126 serves as the human-machine interface (HMI).
Together, they provide operators with real-time diagnostics, speed monitoring, and the ability to adjust control dynamics on the fly.
This pair is widely respected in the industry for its “set-and-forget” reliability in harsh environments.