Description
The Woodward 9905-973 LINKnet 8 Channel Relay Module is a distributed relay output module designed for Woodward LINKnet control architectures. It converts digital commands from the controller into eight independent relay output signals for controlling external field devices such as solenoid valves, contactors, alarms, motors, and auxiliary equipment.
The module is widely used in turbine control, generator systems, engine management, and industrial automation applications. It provides isolated relay outputs and communicates with compatible Woodward control platforms through the LINKnet network, allowing remote installation close to field devices and reducing complex wiring requirements.
The 9905-973 features eight relay channels, 18–32 VDC power input, diagnostic monitoring, and reliable switching performance for demanding industrial environments. It is commonly applied as a replacement spare module in legacy Woodward NetCon and LINKnet-based systems.
9905-973
📌 Product Parameters
| Parameter | Description |
|---|---|
| Brand | Woodward |
| Model | 9905-973 |
| Series | LINKnet I/O Module |
| Product Name | 8 Channel Relay Module |
| Origin / Place of Origin | USA |
| Product Status | New Surplus / Open Box / Industrial Spare |
| Dimensions | Approx. 125 × 75 × 32 mm |
| Weight | Approx. 0.59 kg |
| Power Supply | 18–32 VDC (24 VDC nominal) |
| Discontinued | Legacy product, limited availability |
📌 Product Datasheet
| Parameter | Description |
|---|---|
| Module Type | LINKnet Relay Output Module |
| Output Channels | 8 Independent Relay Channels |
| Output Type | Electromechanical Relay Contact |
| Communication Interface | LINKnet Network |
| Power Consumption | Approx. 5–14 W depending on configuration |
| Relay Contact Rating | Up to 5A DC28V / industrial relay switching |
| Isolation | Relay and network electrical isolation |
| Installation | Industrial panel / control cabinet mounting |
| Application | Turbine, generator, engine and process control |
| Function | Digital output switching and field device control |
📌 Common Questions & Answers
❓ Q: What is the main function of the Woodward 9905-973?
A: The module receives digital control commands through the LINKnet network and provides eight relay outputs to operate external electrical devices.
❓ Q: How many relay outputs does this module provide?
A: The 9905-973 provides eight independent relay output channels.
❓ Q: What equipment can be controlled by this module?
A: It can control devices such as solenoid valves, contactors, alarms, motor starters, and other discrete field loads.
❓ Q: Is the 9905-973 compatible with MicroNet or NetCon systems?
A: Compatibility depends on the controller configuration, but it is commonly used within Woodward LINKnet-based control architectures.
❓ Q: What should be checked before replacement?
A: Verify the model number, LINKnet configuration, power supply voltage, relay wiring, and controller software settings before installation.
❓ Q: What are common failure symptoms?
A: Typical issues include loss of relay output, communication alarms, incorrect switching status, or controller diagnostic faults.
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