Woodward 8444-1091 505 Turbine Control | 100% Original
1.8444-1091 Product Overview
The Woodward 8444-1091 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.
contacts： Mike
+86 18350224834 （WeChat/WhatsApp）
Email：Mike18350224834@gmail.com
2. 8444-1091 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 8444-1091 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.
Most loads, whether inductive or capacitive, require a modulation frequency higher than 10Hz. Imagine if a light bulb were to be turned on for 5
seconds, then turned off for 5 seconds, and then turned on and off again. The duty cycle is still 50%, but the bulb will light up in the first 5
seconds and turn off in the next 5 seconds. To achieve a power supply effect of 4.5V voltage for the light bulb, the on-off cycle period must be
sufficiently short compared to the response time of the load to switch state changes. To achieve the effect of dimming
the light (but keep it on), it is necessary to increase the modulation frequency. The same requirements also apply in other PWM applications.
The usual modulation frequency is between 1kHz and 200kHz.
hardware controller
Many microcontrollers contain PWM controllers internally. For example, Microchip”s PIC16C67 contains two PWM controllers, each of which can choose
the on-time and cycle. Duty cycle is the ratio of on-time to cycle; The modulation frequency is the reciprocal of the period. Before performing PWM operations,
this microprocessor requires the following tasks to be completed in software:
Click to learn more about Woodward”s products
ASML 4022.472.42584 RED635 Solid State Laser Module 635nm ELEC-I-1050=9A
ASML 4022.640.59951
ASML PAS5000 REMA BLADE ASSEMBLY 4022.428.0863
New ASML 4022.634.27501 HW Robot Interface PCA Assy 402263427511
ASML Photoresist lens, sold as is,no return
1PCS ASML 4022.456.04391 RT-X6 124427876 90days warranty via DHL or FedEx
ASML 4022.455.4531 Wafer Chuck Table
ASML Chuck Parking Lock (CPL) SEM-I-863=9B45
Force Computers 310011 Processor PCB Card ASML 4022.428.1134 PAS 50002500
28319 ASML PCB ASSY, SINGLE BD COM, MVME 167-32B, 01-W3899B32C 4022.436.8131
SVG 99-80266 Station CPU resist coater ASML litho
4022.476.01371 PSU 270V 1.9A 3HE 12TE
ASML 854-9507-001 RETICLE APPLICATIONS LINEWIDTH
ASML 4022.430.0530 P. Chuck Drive PCB Card PAS 50002500 Wafer Stepper
ASML 4022.456.1094 Wafer Heater Assembly,
1PCS STATION 662 ASML 4022 197 52062 69741 (3-month warrantySHIP FedEx)
ASML Load Port 4022.631.26719
ASML CCM REMOTE CONTROL BOX MAXON MOTOR 4022.636.57337 *SEALED*
ASML 4022.436.1723 Laser Cam 4022.456.48071 Semiconductor Manufacturing
ASML Level Sensor Demodulator PPCA Board
ASML REMA BOX 4022.430.09812 PAS 250040 STEPPER
ASML STEPPER PAS2500 STEPPER FESTO PNEUMATIC BOX UNIT 5 SERIES 0889R 280855-932
There are no reviews yet.