Excellent PLC
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| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The Woodward 9905-970 is a high-performance 6-Channel Input Module designed for use in LinkNet Distributed I/O systems, part of Woodward’s modular control solution portfolio. Built with industrial-grade durability and intelligent input diagnostics, this module is engineered to reliably capture discrete signal states from field devices, including switches, sensors, and relays.
Integrated into distributed control systems such as MicroNet Plus, this module serves as an essential bridge between physical processes and digital automation. The 9905-970 supports real-time signal monitoring and is ideal for mission-critical operations where precision and system integrity are vital. Its robust electrical isolation and plug-and-play modularity allow for scalable installation in various industrial, energy, and transportation applications.
Product Specifications
| Parameter | Details |
|---|---|
| Model | 9905-970 |
| Series | LinkNet Distributed I/O |
| Module Type | 6-Channel Digital Input Module |
| Number of Inputs | 6 Discrete Inputs |
| Input Type | Dry Contact, Voltage (nominal 24 VDC) |
| Input Voltage Range | 0–30 VDC |
| Logic Thresholds | ON ≥ 10 VDC; OFF ≤ 5 VDC |
| Input Isolation | Optical and galvanic, per channel |
| Status Indicators | Front-panel LEDs per input channel |
| Input Signal Debounce | Programmable via main control software |
| Update Rate | <5 ms |
| Power Supply Voltage | 18–32 VDC |
| Power Consumption | Approx. 4.5 W |
| Communication Interface | LinkNet over CAN or RS-485 |
| Mounting Type | DIN Rail Mounting |
| Enclosure | Industrial rugged case, conformal coated |
| Operating Temperature | –40 °C to +70 °C (–40 °F to +158 °F) |
| Storage Temperature | –55 °C to +85 °C |
| Humidity | 5–95% RH, Non-condensing |
| Dimensions | 355.6 x 279.4 x 101.6 mm |
| Weight | 0.907 kg |
| Certifications | CE, UL Recognized, CSA, RoHS Compliant |
| Compliance Standards | IEC 61131, EN 61000-6-2/4, IEEE C37.90 |
Applications
The Woodward 9905-970 finds its place in a wide variety of automation environments:
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Turbine Control Systems: Monitoring discrete signals like limit switches, pressure alarms, and interlocks.
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Power Generation Facilities: Input from breakers, contactors, and grid interface relays.
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Marine and Transportation: Status monitoring from equipment and onboard systems.
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Process Industries: Capturing sensor states in oil & gas, chemical, or water treatment operations.
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Factory Automation: Signal acquisition from pushbuttons, door sensors, and machine interlocks.
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Substation Automation: Gathering binary information from protection relays and devices.
Advantages
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High Reliability: Built for harsh conditions with wide operating temperature and rugged housing.
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Channel Isolation: Optical and galvanic isolation prevents ground loops and protects from surges.
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Real-Time Performance: Fast input processing with <5 ms update rate improves response in critical systems.
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Easy Diagnostics: Onboard LED indicators per channel offer real-time status and troubleshooting aid.
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Modular Integration: Easily added to existing LinkNet systems without needing rewiring or downtime.
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Flexible Voltage Compatibility: Accepts a broad range of discrete input voltages (up to 30 VDC).
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Software Configurable: Debounce and logic configuration available through Woodward control software.
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Field-Proven Design: Used in globally deployed Woodward turbine and energy control systems.
Frequently Asked Questions (FAQ)
1. What type of input signals does the 9905-970 support?
It supports digital (discrete) input signals, including dry contact closures and voltage-based inputs (0–30 VDC).
2. How many channels are available?
The module provides six independently isolated input channels.
3. Can this module handle noisy environments?
Yes, it includes isolation and debounce features to ensure clean signal acquisition in noisy conditions.
4. Is it compatible with Woodward’s Micronet Plus system?
Absolutely. It integrates seamlessly via LinkNet communication.
5. What is the update rate for input channels?
Each input channel updates in under 5 milliseconds.
6. Are the inputs isolated?
Yes, each input is both optically and galvanically isolated.
7. Does it have built-in status indicators?
Yes, each channel has an LED to display input state in real-time.
8. How is it mounted?
It is DIN-rail mountable, ideal for panel installations.
9. Is this module hot-swappable?
No, the system must be powered down before inserting or removing the module.
10. Is this unit suitable for outdoor or remote installations?
Yes, with proper enclosures and environmental protection, it’s suitable for remote or harsh site deployments.
Related Models from the Same Series
| Model | Description |
|---|---|
| 9905-969 | LinkNet 6-Channel Analog Input Module |
| 9905-968 | LinkNet 6-Channel Analog Output Module |
| 9905-967 | LinkNet 8-Channel Digital Input Module |
| 9905-966 | LinkNet 8-Channel Digital Output Module |
| 9905-971 | LinkNet Power Supply Module |
| 9905-972 | LinkNet Expansion Base Plate |
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