Woodward 8440-2088 Price Discount | In Stock
1.8440-2088 Product Overview
The Woodward 8440-2088 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 8440-2088 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 8440-2088 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
(4) DMA request “flag: Whenever the device prepares a data word, a control signal is given to set the” DMA request “flag to” 1 “.
After the flag is set, it sends a DMA request to the “control/status” logic, which in turn sends a bus usage right request (HOLD) to the
CPU. The CPU responds to this request and sends back a response signal HLDA. The “control/status” logic receives this signal and
sends a DMA response signal, resetting the “DMA request” flag and preparing for the next word exchange.
(5) Control/Status “logic: composed of control and timing circuits, as well as status flags, used to modify memory address counters and
word counters, specify transfer types (input or output), and coordinate and synchronize” DMA request “signals and CPU response signals.
(6) Interrupt mechanism: When the word counter overflows, it means that a set of data exchange has been completed, and the overflow
signal triggers the interrupt mechanism to issue an interrupt report to the CPU.
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