8291-020 Woodward turbine controller

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Product basic information
Manufacturer: Woodward
Model: 8291-020
Belonging to the famous 505 series
Supports multiple communication protocols and can be smoothly integrated with the existing control system of the factory
Core application: Designed specifically for speed control and protection of steam turbines
8291-020 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 8291-020 controller debugger module Motor touch screen WOODWARD

8291-020 Woodward turbine controller

The 8291-020 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 8291-020
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:
- 8291-020 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:
- - Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
  - Offers local/remote control priority selection to adapt to different operational scenarios.

Explanation: 1. SRV-CTRL refers to the servo control module of PLC;

2. Take the → pointer as input and the ← pointer as output.

3. The meanings of each signal are as follows:

INH: Prohibit input of pulse commands (prohibited when open circuit);

OZ -: Z-phase output;

OZ+: Z-phase output;

S-RDY: The servo drive is ready;

ALM: Servo drive fault alarm;

COIN: Positioning completed;

SRV-ON: servo drive “on” signal;

COM -: Negative pole of power supply;

COM+: Positive pole of power supply;

PULS1: Command pulse input terminal;

PULS2: Command pulse input terminal;

SIGN1: Command pulse symbol input terminal;

SIGN2: Command pulse symbol input terminal;

Servo Drive Wiring Guide

In the field of industrial control automation, many devices have strict installation specifications. So, in order to avoid usage risks and eliminate safety hazards, what are the rules for connecting servo drives?

1. It is recommended to use a three-phase isolation transformer for power supply to reduce the possibility of electric shock.

2. It is recommended to use a noise filter for power supply to improve anti-interference ability.

3. Please install a non melting short-circuit circuit breaker to promptly cut off external power in case of driver failure.

4. The grounding wire should be ≥ 2.5m2, as thick as possible, and made into a single point grounding. The grounding terminal of the servo motor must be connected to the grounding terminal PE of the driver.

5. Connect the shielding layer of the cable correctly.

To prevent interference and misoperation, it is recommended to install a noise filter and pay attention to:

(1) The noise filter, servo drive, and upper controller should be installed as close as possible.

(2) Surge suppressors must be installed in relays, AC contactors, brakes, and other coils.

(3) Power circuit cables and signal lines should not be tied together.

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: 8291-020 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).
8291-020 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 8291-020Suitable 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.