8406-113 Woodward speed control module
The 8406-113 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series.
It is primarily designed for speed control and protection of steam turbines. Below is a detailed introduction to this product:
I. Product Overview
- Brand and Model: Woodward 8406-113
- Series: 505 Series Digital Governor
- Type: Microprocessor-based controller
- Purpose: Specifically designed for steam turbines to control their speed and provide overspeed protection.

II. Core Functions
- Speed Control:
- 8406-113 Precisely controls the speed of steam turbines by adjusting steam inlet flow.
- Supports single-range or split-range actuators to accommodate turbines of different sizes.
- Overspeed Protection:
- Incorporates triple independent overspeed protection logic to ensure rapid shutdown in case of overspeed, preventing equipment damage.
- Provides an overspeed test button for convenient on-site testing of protection functions.
- Emergency Shutdown:
- Equipped with an emergency stop button for immediate shutdown in emergency situations.
- System Protection:
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- Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
- Offers local/remote control priority selection to adapt to different operational scenarios.

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Can store registration cards: 40000, can store records: 100000
Communication method: TCP/IP
Supporting software: Simplified Chinese, English
Supported databases by supporting software: Access and SQL
Supporting chassis size: 273mm length * 228mm width * 65mm height Power supply: DC12V3A
Power input: AC110V or AC220V Operating temperature: -35 to 65 degrees Celsius
Operating humidity: less than 95% RH, no condensation
Extended functions:
The fire linkage door linkage door has an alarm if it is not closed for a long time, an illegal intrusion alarm, an illegal
card swiping alarm, and a coercion alarm function (if the fire and alarm linkage expansion board is not connected, it only
has a software interface alarm prompt and drives the computer speaker to give an alarm. If the expansion board is connected,
it has a hardware alarm output function and can drive devices such as lights or sirens). The forced door status is normally open
or normally closed, and the remote door opening function is available
Interlocking function (dual door and four door controllers have controller multi door interlocking function) Anti submarine return and anti tailgating function
Multi card simultaneous verification with door opening function, timed constant door opening function
Emergency door closing function (emergency double closing) with the first card opening the door
External password keyboard function (card+password, super pass password) for operators to manage permissions, departments, and areas, etc
III. Technical Specifications
- Power Supply: 18-32 VDC, supporting 24VDC input.
- Display: Two-line x 24-character LED display for clear indication of operating status and parameters.
- Enclosure: NEMA 4X or IEC 60529 IP56 rated for protection against harsh industrial environments.
- Inputs/Outputs:
- Inputs: 6 programmable current inputs, 16 discrete contact inputs.
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs.
- Communication Interfaces: 8406-113 Supports RS-232, RS-422, and RS-485 hardware interfaces for easy integration with host computers or other devices.
- Software: Equipped with OpView™ and 505View software for parameter configuration, monitoring, and fault diagnosis.
- Operating Temperature: -20 to +60°C (some models support -4 to +140°F).
- Storage Temperature: -40 to +85°C (some models support -40 to +185°F).
- 8406-113 Weight: Approximately 9.11 pounds (4.13 kilograms).
IV. Application Scenarios
- Steam Turbine Control: 8406-113Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders.
- Single Extraction and Admission Applications: Designed for operating steam turbines in single extraction and/or admission applications.
- On-Site Programming: Allows on-site operators to program and adjust parameters through an integrated operator control panel, adapting to different operating conditions.
V. Product Advantages
- High Reliability:
- Microprocessor-based design ensures precise control and stability.
- Triple independent overspeed protection logic provides multiple layers of safety.
- Flexibility:
- Supports various actuator and sensor configurations to accommodate different turbine models.
- Offers a rich set of input/output interfaces for easy system expansion and integration.
- Ease of Use:
- Two-line x 24-character LED display provides an intuitive operating interface.
- A 30-key multifunctional keyboard simplifies parameter configuration and operation.
- Compatibility:
- Supports multiple communication protocols for easy integration with DCS, PLC, and other systems.
- Provides OpView™ and 505View software for remote monitoring and fault diagnosis.
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