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The Woodward 1784-1028 is an isolated linearized thermocouple input converter, belonging to Woodward's digital conversion module series and specially designed for thermocouple signal processing of key equipment such as industrial turbines and engines. Its core function is to perform isolation and linearization conversion on the temperature signals collected by thermocouples and output standard industrial signals for reception by control systems. Equipped with core capabilities including signal isolation, anti-interference, and linearization calibration, it is compatible with Woodward's full range of control systems and mainstream industrial automation systems. Widely used in the energy, petrochemical, marine and other fields, it provides core signal conversion support for the accuracy and stability of equipment temperature monitoring. It collaborates with the same series of modules such as the 1784-1044 analog voltage input module and 1784-170 power supply module to form a complete signal processing link.
1. Product Attributes
| Attribute | Details |
|---|---|
| Model Number | Woodward 1784-1028 |
| Product Type | Industrial-grade isolated linearized thermocouple input converter, belonging to Woodward's 1784 series digital conversion modules. Different from ordinary signal transfer modules, it focuses on the isolation, linearization processing and standard signal output of thermocouple temperature signals. It does not participate in direct control and only undertakes signal conversion and transmission functions, serving as a key intermediate component connecting thermocouple sensors and control systems in industrial temperature monitoring systems. |
| Core Application | Receives non-linear temperature signals collected by thermocouple sensors and converts them into linear electrical signals through built-in linearization algorithms; features signal isolation function to isolate input and output signals and avoid interference transmission; outputs standard industrial analog signals (e.g., 4-20mA, 0-10V DC) for reception by Woodward controllers (e.g., 5441 series) and DCS/PLC systems, realizing accurate temperature monitoring and data upload of key parts (e.g., cylinder block, air inlet) of equipment such as turbines and engines. |
| Typical Position | As a core intermediate component for thermocouple signal processing, it fills the adaptation gap between the non-linear signals of thermocouples and the standard input signals of control systems. Through isolation anti-interference and linearization calibration, it improves temperature monitoring accuracy, protects the rear-end control system from front-end signal interference and high-voltage impact. It collaborates with the same series of power supply modules and other input conversion modules to build a stable and reliable industrial signal processing link, suitable for temperature monitoring scenarios of various key equipment. |
2. Technical Specifications
2.1 Signal Conversion and Processing Parameters
| Parameter Category | Core Indicators | Explanations |
|---|---|---|
| Input Signal | Thermocouple input (compatible with common thermocouple types such as K, J, S, T), supporting wide-range temperature-corresponding signal input | Compatible with mainstream industrial thermocouple models and can be flexibly adapted according to on-site sensor types. The input signal range corresponds to the conventional temperature measurement range of thermocouples (-200℃~1300℃, adjusted with thermocouple types), accurately collecting temperature signals of key equipment parts. |
| Output Signal | Standard industrial analog output (4-20mA current output or 0-10V DC voltage output, programmatically switchable) | The output signal has a linear correspondence with the input temperature signal and can be directly connected to the analog input interfaces of Woodward controllers and DCS/PLC systems without additional signal conversion equipment, realizing seamless upload of temperature data. |
| Linearization Accuracy | Linearization error ≤±0.2% FS (Full Scale), sampling frequency ≥10Hz | Built-in high-precision linearization algorithm corrects the inherent non-linear error of thermocouples, ensuring a precise linear correspondence between the output signal and the actual temperature. The sampling frequency can meet the demand of real-time temperature monitoring and avoid data delay. |
| Isolation Performance | Three-terminal isolation for input/output/power supply, isolation voltage ≥1000V AC (sustained for 1 minute) | Effectively isolates front-end thermocouple signal interference and power supply interference, preventing interference signals from being transmitted to the rear-end control system, protecting control modules from high-voltage impact, and improving the stability and reliability of the entire monitoring system. |
| Power Supply Requirement | Adaptable to industrial standard DC power supply (24V DC for conventional adaptation, compatible with 18-36V DC wide voltage range), low power consumption design | It can be powered collaboratively with the same series of 1784-170 and 1784-188 power supply modules, compatible with general on-site power supply specifications with reasonable power consumption control that does not increase the system's power load. It has strong voltage adaptability and can cope with voltage fluctuations in industrial sites. |
2.2 Physical and Installation Specifications
| Parameter Category | Core Indicators | Explanations |
|---|---|---|
| Dimensions & Weight | Compact module design, approx. 10cm×5cm×15cm in size, approx. 0.3-0.5kg in weight | Small in size and light in weight, it is suitable for dense installation scenarios in industrial control cabinets. It can be installed in the same cabinet with the same series of 1784 modules and Woodward controllers, without occupying excessive cabinet space, facilitating cable arrangement and internal cabinet layout. |
| Mounting Method | Standard DIN rail mounting, supporting auxiliary flush mounting in control cabinets | The installation process is simple, adapted to the general DIN rail of industrial control cabinets, enabling quick fixation and disassembly for convenient later maintenance and replacement. The terminal layout is reasonable, with separate input, output and power supply interfaces to avoid wiring errors. |
| Panel Configuration | Operating status indicator lights, wiring terminals, calibration interface, some versions support simple parameter adjustment DIP switches | Status indicator lights intuitively reflect the module's operating status such as power supply, signal conversion and fault; the calibration interface facilitates connection with debugging equipment for linearization calibration and parameter fine-tuning; DIP switches enable quick switching of thermocouple types and output signal modes (supported by some versions). |
2.3 Environmental Adaptability
| Parameter Category | Core Indicators | Explanations |
|---|---|---|
| Temperature Range | Operating temperature: -10℃~+60℃; Storage temperature: -40℃~+85℃ | The wide-temperature design is suitable for scenarios such as industrial on-site control rooms and outdoor cabinets, and can operate stably in extreme high and low temperature environments without additional temperature control equipment, adapting to the high-temperature working conditions around turbines and engines. |
| Protection & Anti-interference | IP20 protection grade (suitable for cabinet installation), with anti-electromagnetic interference, anti-vibration and anti-surge functions, EMC compliant with industrial standards | Adapted for cabinet installation scenarios, effectively resisting the intrusion of dust in industrial sites; the electromagnetic shielding design prevents electromagnetic interference from equipment such as frequency converters and motors to avoid signal distortion; the anti-vibration design is adapted to the vibration environment during equipment operation, ensuring the stability of signal conversion. |
3. Adapted Systems and Hardware Combinations
3.1 Adapted Equipment and Systems
It is core-compatible with Woodward's full range of control systems (e.g., 5441 series digital controllers, MicroNet series controllers) and can work collaboratively with the same series of 1784-1044 analog voltage input modules, 1784-170/188 power supply modules and 1784-199 RS232 to RS422/485 converters to form a complete industrial signal acquisition, conversion and transmission link. It is compatible with common types of thermocouple sensors such as K, J, S and T, and can be directly connected to the temperature collection points of equipment such as turbines and engines. Meanwhile, it is compatible with mainstream DCS/PLC systems (e.g., ABB, Emerson, Honeywell), and the output standard analog signals can be directly connected to the control systems to achieve seamless integration.
3.2 Supporting Software and Debugging Tools
It is matched with Woodward's dedicated debugging software and calibration tools, supporting linearization parameter calibration, thermocouple type adaptation, output signal fine-tuning and other functions. The software has a simple visual operation interface, which can view the corresponding relationship between input and output signals in real time and correct linearization errors to ensure the accuracy of temperature signal conversion. It supports fault log reading for quick troubleshooting of signal distortion, module faults and other problems. After debugging, the parameters can be solidified and stored to avoid parameter loss caused by misoperation.
3.3 Expansion and Linkage Capabilities
It supports parallel deployment of multiple modules and can be densely installed via DIN rails, adapting to multi-point temperature monitoring scenarios (e.g., temperature collection of multi-cylinder engines and multi-section turbines). It can be expanded to connect external devices such as signal isolators and surge protectors to further improve anti-interference capability and module safety. The output signal can be linked with the rear-end alarm system; when the converted temperature signal exceeds the set threshold, it triggers sound and light alarms in cooperation with the control system to remind operation and maintenance personnel to handle it in a timely manner. It supports indirect linkage with Woodward actuators, valves and other equipment to provide signal support for equipment temperature protection.
4. Product Features
High-precision signal conversion: Built-in professional linearization algorithm effectively corrects the inherent non-linear error of thermocouples with high conversion accuracy and fast sampling speed, ensuring a precise correspondence between temperature signals and output signals and providing a reliable guarantee for accurate equipment temperature monitoring.
Strong isolation and anti-interference: The three-terminal isolation design for input/output/power supply can effectively isolate electromagnetic interference and power supply interference in industrial sites, prevent interference signals from being transmitted to the rear-end control system, protect control equipment from damage, and improve the stability of the entire monitoring system.
Flexible adaptation and integration: Compatible with a variety of common thermocouple types and standard industrial output signals, it can be seamlessly connected to Woodward's full range of control systems, the same series of conversion modules and mainstream DCS/PLC systems, adapting to different industrial automation architectures and enabling rapid integration for the transformation of old and new systems.
High reliability and convenient maintenance: The design with wide temperature adaptability, anti-vibration and low power consumption can cope with harsh industrial working conditions and meet the demand for 7x24-hour continuous operation. Standardized rail mounting, intuitive status indication and convenient calibration functions reduce the difficulty of installation and later maintenance.
5. Application Scenarios
Energy sector: Temperature monitoring of turbine cylinder blocks, air inlets and exhaust outlets in thermal power plants and gas turbine generator sets, temperature signal conversion of turboexpanders in waste heat power generation and industrial waste gas treatment systems. Cooperating with Woodward controllers to achieve accurate temperature monitoring and protection, ensuring power generation efficiency and system stability.
Petrochemical industry: Temperature collection and signal conversion of oilfield driving equipment and pipeline compressors, temperature monitoring of turbines supporting factory steam systems and chemical reactors. Adapted to explosion-proof areas (with appropriate explosion-proof enclosures selected) and harsh working conditions to ensure the safe operation of equipment.
Marine and offshore platforms: Multi-point temperature signal processing of turbines and engines for marine propulsion systems and standby power supplies of offshore platforms, coping with harsh marine environments such as high humidity, vibration and salt spray. It provides stable signal conversion support for the equipment temperature monitoring system, ensuring navigation and platform power supply safety.
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