The WOODWARD 9905-973 is a high-performance 8-channel relay module designed for industrial automation systems, offering precise control and switching of electrical loads. Engineered for reliability and flexibility, the 9905-973 integrates seamlessly with PLCs, DCS systems, and other control platforms, making it ideal for applications in energy, manufacturing, and process industries. Its compact design and robust construction ensure optimal performance in harsh environments.
2. Key Technical Parameters
Parameter
Specification
Module Type
Discrete Output (Relay)
Number of Channels
8 (SPDT/DPDT configurable)
Voltage Rating
18–32V DC (input/output)
Current Capacity
5A per channel (28V DC)
Contact Rating
30V DC/5A, 250V AC/5A
Isolation
2.5kV DC between channels
Environmental Rating
IP67 (dustproof and waterproof)
Operating Temperature
-20°C to +60°C
Dimensions
150 × 100 × 80 mm
Weight
0.75 kg
3. Advantages and Features
High-Density Control:
8 independent relay channels reduce system complexity and space requirements.
Hot-swap capability enables maintenance without system shutdown.
Reliability:
Gold-plated contacts ensure low resistance and extended operational life (over 10 million cycles).
EMI/ESD shielding protects against electromagnetic interference.
Flexibility:
Configurable for AC/DC loads and 常开 / 常闭 modes.
Supports Modbus, Profibus, and Ethernet/IP protocols for easy integration.
4. Application Areas and Use Cases
Energy: Gas turbine control systems, power plant switchgear.
Oil & Gas: Valve actuation, pump control in offshore platforms.
Case Study: A European power plant reduced wiring costs by 35% using the 9905-973 to manage 8 critical turbine circuits, improving system reliability and efficiency.
5. Competitive Comparison
The 9905-973 stands out with:
Higher Channel Density: 8 channels vs. typical 4–6 channels in comparable modules.
Enhanced Safety: Built-in short-circuit protection and overload detection.
Environmental Resilience: IP67 rating vs. standard IP20 for most competitors.
6. Selection Recommendations
Channel Requirements: For fewer than 8 outputs, consider the 9905-001 variant.
Voltage Compatibility: Verify input/output voltage matches your system’s requirements.
Environment: Choose IP67-rated models for outdoor or wet environments.
7. Precautions
Installation: Follow ESD protocols and ensure proper grounding.
Load Management: Avoid exceeding 5A per channel to prevent contact degradation.
Maintenance: Inspect contacts annually and clean debris from ventilation ports.
Shanxi Xinyeda International Trade Co., Ltd. supplies WOODWARD 9905-973 and automation solutions. Visit www.xydcontrol.com or contact us for sales and technical support.
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Full 12-month warranty on all components
Full 12-month warranty on all components
