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Overview
The 9905-972 analog output module from the Woodward Linknet distributed I/O platform is designed to extend control capability in turbine and generator management systems. As part of the Linknet node architecture, this module provides six independent current loop outputs for transmitting precise control signals to field devices such as actuators, valves, and monitoring instruments.
Engineered for integration with Woodward turbine controllers, the module ensures stable signal generation, electrical isolation, and reliable communication across distributed control networks used in industrial power generation and process facilities.
Key Functional Characteristics
• Six isolated analog output channels for independent signal control
• Industry-standard 4–20 mA current loop outputs suitable for long-distance transmission
• High-resolution signal generation for accurate actuator positioning and process regulation
• Integrated self-diagnostics for output monitoring and fault reporting
• Electrical isolation between channels and communication bus to improve system reliability
• Designed for use within the Woodward Linknet distributed I/O chassis
Electrical Specifications
| Parameter | Specification |
|---|---|
| Output Channels | 6 Independent Channels |
| Output Signal | 4–20 mA Current Loop |
| Resolution | ≥12-bit Digital-to-Analog Conversion |
| Accuracy | High-precision industrial control output |
| Load Capability | Supports standard industrial loop impedance |
| Isolation | Channel-to-Channel and Channel-to-Backplane |
| Power Supply | 24 VDC via Linknet backplane |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | –25 °C to +60 °C |
| Storage Temperature | –40 °C to +85 °C |
| Relative Humidity | 5–95% Non-Condensing |
| Environmental Rating | Industrial-grade electronics for harsh environments |
Physical Specifications
| Parameter | Specification |
|---|---|
| Module Type | Plug-in Linknet I/O Module |
| Dimensions | 200 × 150 × 40 mm |
| Weight | 1.30 lbs |
| Housing | Rugged industrial module enclosure |
| Installation | Linknet Node Backplane Mounting |
Typical Applications
The 9905-972 module is commonly installed in distributed turbine and generator control systems where precise analog control signals are required. Typical applications include:
• Steam turbine control systems
• Gas turbine auxiliary control panels
• Generator excitation and load control systems
• Distributed plant control architectures
• Industrial power generation facilities
FAQ
What type of signals does the 9905-972 output?
The module generates six independent 4–20 mA analog output signals, which are the most common standard for industrial control and instrumentation loops.
Is the module isolated between channels?
Yes. The module provides electrical isolation between channels and between the I/O circuitry and the Linknet communication bus to enhance operational stability and reduce noise interference.
Which systems use this module?
It is designed for Woodward Linknet distributed I/O systems commonly deployed with turbine controllers and generator control platforms.
