9905-968 Woodward LinkNet LON/MODBUS RTU Input Module
Manufacturer: Woodward
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Part Number: 9905-968
Condition：New with Original Package
Product Type: Distributed I/O Modules
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Country of Origin: GERMANY
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Woodward 9905-968 is a high-performance LinkNet 6-Channel Analog Input Module designed to bridge the gap between field sensors and centralized control architectures. This module converts six independent 4–20 mA analog signals into precise digital data for seamless integration with PLCs and Distributed Control Systems (DCS). We offer this unit as 100% Brand New factory stock. Its ruggedized construction and distributed I/O capabilities allow for localized signal processing, significantly reducing wiring costs and signal degradation over long distances in industrial power and process plants.
Technical Specifications
The 9905-968 utilizes high-speed conversion circuitry protected by an industry-leading environmental housing.
| Parameter | Details |
| Manufacturer | Woodward, Inc. (USA) |
| Model / Part Number | 9905-968 |
| Series | LinkNet |
| Input Channels | 6 Independent Channels |
| Input Range | 4–20 mA |
| Power Supply | 24 VDC |
| Communication Protocols | MODBUS RTU, LON (Local Operating Network) |
| Operating Temperature | –40 °C to +85 °C |
| Environmental Rating | IP67 (Dust-tight, Waterproof) |
| Dimensions | 140 × 120 × 45 mm |
| Weight | 0.85 kg |
| Certifications | CE, UL Listed |
Engineering Advantages
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IP67 Environmental Resilience: The 9905-968 features a fully sealed, IP67-rated enclosure. This allows for direct mounting on turbine skids or engine decks where dust, moisture, and oil mist would destroy standard DIN-rail I/O. It eliminates the need for expensive secondary protective cabinets.
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Decentralized Intelligence: By utilizing the LON or MODBUS RTU protocols, the 9905-968 enables a distributed control strategy. You can mount the module closer to the sensors (temperature, pressure, or flow), reducing the length of sensitive analog cable runs and minimizing Electromagnetic Interference (EMI) pick-up.
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Wide Temperature Survivability: The hardware maintains 100% accuracy across a massive thermal window of –40 °C to +85 °C. This makes it a primary choice for unconditioned industrial environments, from arctic oil fields to high-heat desert power stations.
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Simplified Troubleshooting: Six independent channels allow for simultaneous monitoring of multiple process variables. Integrated diagnostics help identify loop failures or sensor out-of-range conditions, facilitating faster maintenance cycles.
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Ultra-Compact Footprint: Despite its rugged build, the module’s low-profile design fits into extremely tight spaces within modern industrial machinery, maximizing installation flexibility in space-constrained retrofits.
FAQs
Q: Does the 9905-968 require a separate communication gateway?
A: No. The module supports MODBUS RTU and LON natively. You can daisy-chain multiple LinkNet modules directly to your PLC or Woodward MicroNet controller using standard twisted-pair communication cables.
Q: Can I use this module to monitor 0–10V signals?
A: This specific model is optimized for 4–20 mA current loops, which is the preferred standard for industrial interference rejection. To monitor 0–10V signals, you would typically use a signal conditioner/resistor or select a different LinkNet variant designed for voltage inputs.
Q: Is this module hot-swappable?
A: LinkNet modules allow for simplified replacement; however, always follow site-specific safety protocols and Woodward’s power-down procedures to prevent data corruption on the communication bus during maintenance.
Q: How does the IP67 rating impact installation?
A: The IP67 rating means the unit is dust-tight and can withstand temporary immersion in water. You can mount the 9905-968 in "wash-down" areas or environments exposed to heavy spray without additional weather shielding.