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- Woodward
- 9905-971
- 16-Channel Discrete Input Module
- USA
- 355.6 x 279.4 x 101.6mm
- 0.5 kg
- Xiamen, China
- New & In Stock
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Woodward 9905-971 16-Channel Discrete Input Module
Product Overview
The Woodward 9905-971 is a 16-channel discrete input module designed for use in industrial automation and control systems where reliable monitoring of on/off (digital) signals is critical. This module serves as a vital interface between field devices—such as switches, relays, sensors, and pushbuttons—and the control system, enabling real-time acquisition of binary input states.
With robust signal isolation, high-speed detection capabilities, and compatibility with Woodward’s control platforms, the 9905-971 is built to ensure operational continuity in demanding environments. Its rugged construction and compact form factor make it ideal for applications in power generation, oil and gas, marine systems, and process automation.
Technical Specifications
| Parameter | Description |
|---|---|
| Product Model | 9905-971 |
| Function | Discrete (Digital) Input Module |
| Number of Channels | 16 |
| Input Signal Type | Dry contact or voltage-type input |
| Input Voltage Range | Typically 18–32 VDC |
| Isolation | Optical isolation per channel |
| Input Type | Sinking or sourcing (configurable) |
| Diagnostics | Channel state and fault monitoring |
| Scan Rate | <1 ms |
| Operating Temperature | -40°C to +70°C |
| Mounting Type | Panel or rack mountable |
| Dimensions (W × H × D) | 355.6 × 279.4 × 101.6 mm |
| Weight | 0.5 kg |
| Brand | Woodward |
| Product Series | MicroNet Plus Series / Woodward Control Systems |
Product Applications
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Power Generation Systems: Monitors discrete status inputs from breakers, turbine trip sensors, and protection relays in power plants.
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Oil & Gas Operations: Tracks valve positions, emergency stops, and interlock states in pipeline and refinery automation.
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Marine and Offshore: Used for onboard system monitoring including hatch closures, pumps, alarms, and fire safety systems.
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Industrial Automation: Interfaces with control panels, PLCs, or SCADA for detecting limit switches, door sensors, and operator commands.
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Utility and Substation Control: Provides status feedback from field devices such as isolators, relays, and contactors in substations.
Product Advantages
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High-Speed Digital Monitoring: Fast scan rates ensure accurate, real-time acquisition of input states.
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Wide Voltage Compatibility: Can accept a range of input voltages, making it suitable for diverse field wiring conditions.
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Strong Electrical Isolation: Each input is optically isolated to protect the control system from electrical noise and transients.
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Built-In Diagnostics: Enables preventive maintenance through detailed status and fault monitoring.
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Industrial-Grade Durability: Operates in extreme temperatures and challenging environments without compromising performance.
Brand
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Brand: Woodward
Woodward’s MicroNet Plus system is a flexible and modular control platform that delivers powerful logic control, I/O processing, and communication capabilities for critical machinery and process automation applications.
Recommended Related Models (Same Series or Function)
| Model | Description | Channels | Input Type | Weight |
|---|---|---|---|---|
| 9905-969 | Analog Input Module | 8 | 4–20mA | 0.48 kg |
| 9905-870 | Relay Output Module | 8 | SPDT Relay | 0.52 kg |
| 9905-973 | Digital Output Module | 16 | Sourcing Output | 0.49 kg |
| 9905-968 | RTD Temperature Input Module | 6 | RTD (PT100) | 0.50 kg |
| 9905-877 | Digital Input Module with Diagnostics | 32 | Isolated Digital | 0.55 kg |
Popular Woodward Modules (Same Brand)
| Model | Description | Type | Dimensions (mm) | Weight |
|---|---|---|---|---|
| 9905-865 | MicroNet Digital I/O Expansion | Digital I/O | 355 × 280 × 100 | 0.53 kg |
| 9907-164 | CPU Control Module | Central Processor Unit | 350 × 270 × 100 | 0.60 kg |
| 8200-1304 | Speed Sensor Interface | Analog Sensor Input | 180 × 150 × 90 | 0.42 kg |
| 5417-040 | Actuator Driver Module | Analog Output | 250 × 180 × 100 | 0.48 kg |
| 9907-018 | Redundant Power Supply | Power Supply Unit | 300 × 200 × 120 | 0.65 kg |
Frequently Asked Questions (FAQ)
Q1: What does the 9905-971 module do?
A1: It reads digital input signals (ON/OFF status) from field devices and sends them to a controller for monitoring and action.
Q2: How many input channels does the module provide?
A2: The module supports 16 discrete input channels.
Q3: Is the module input type configurable?
A3: Yes, the module supports both sourcing and sinking configurations depending on system requirements.
Q4: What voltage does it accept?
A4: It typically operates within an 18–32 VDC range.
Q5: How is channel isolation handled?
A5: Each channel is optically isolated for protection against electrical surges and noise.
Q6: Can it detect wiring faults?
A6: Yes, it includes channel diagnostics to detect faults and provide real-time feedback.
Q7: What is the scan time for the input channels?
A7: The module features a fast scan rate, typically under 1 millisecond.
Q8: Where is this module commonly used?
A8: It is widely used in power plants, oil and gas facilities, marine automation, and industrial control panels.
Q9: What are the physical dimensions of this module?
A9: It measures 355.6 × 279.4 × 101.6 mm.
Q10: What is the weight of the module?
A10: It weighs approximately 0.5 kg.
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Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
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