Woodward 1790-791 from SAUL ELECTRIC | In Stock
1.1790-791 Product Overview
The Woodward 1790-791 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. 1790-791 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 1790-791 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.
What is an LCD driver
LCD driver is an IC used to store display data transmitted from microcontrollers and drive LCD panels.
The Epson LCD driver has built-in RAM, which enables ultra-low power LCD display.
Overview of Epson LCD Controller
Characteristics of Epson controller
Epson LCDC reduces the load on the host CPU through its unique image processing unit, achieving low-power
and high-speed image rendering. Epson LCDC produces various types of display controllers, such as memory displays,
STNs, and TFTs, which are widely used.
The main applications of Epson LCDC
Epson”s LCDC covers the main resolutions of TFT LCD modules, especially in industrial applications. Adding Epson”s
LCDC as a plugin to the CPU can efficiently achieve color display in a short period of time.
Convert monochrome TFT display to color
There are several factors to consider when converting a monochrome TFT display to color. Firstly, it requires an increase
in the amount of data required for display, as well as higher storage capacity and processing hardware performance. For example,
for a monochrome QVGA (320×240 pixels, 16 grayscale levels) panel, the data capacity of a single image is calculated as
follows: 320x240x4 bits=76800×4 bytes=38400 bytes. In contrast, a full-color QVGA panel (16 million colors, 8 bits per RGB
channel) requires 320x240x24 bits=76800×24 bits=230400 bytes,
which is six times more than monochrome. There are significant differences in the processing and memory requirements
for handling and transmitting image data between monochrome displays and color displays.
If the CPU lacks the necessary specifications, it may be necessary to replace the entire CPU, resulting in significant workload
and cost. However, introducing an Epson LCD controller can achieve colorization without the need to replace the CPU, effectively utilizing existing hardware.
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