Product Description

Distributed Digital Acquisition Overview

The 9905-971 (Model: 9905-971) is a high-density distributed I/O module specifically engineered for the Woodward LinkNet™ control architecture. Functioning as a high-reliability interface for industrial turbine and engine control systems, this module provides 16 independent discrete input channels. The 9905-971 (Part Number: 9905-971) Revision J allows for the direct monitoring of field-side switch contacts, relays, and digital sensors, transmitting data to Woodward MicroNet or Atlas control platforms via the proprietary LinkNet serial bus.

Detailed Technical Specifications

The 9905-971 (9905-971) is designed for deterministic performance and long-term durability in high-vibration and electromagnetic environments.

• Manufacturer: Woodward

• Model Number: 9905-971

• Hardware Revision: Rev J

• Product Type: LinkNet Discrete Input Module

• Channel Count: 16 Independent Discrete Inputs

• Nominal Input Voltage: 24 VDC

• Input Voltage Range: 18–32 VDC

• Input Current: 5 mA per channel at 24 VDC

• Communication Bus: Proprietary LinkNet Serial Interface

• Isolation: Robust optical isolation between field circuitry and internal logic

• Operating Temperature: –40°C to +70°C (Industrial Grade)

• Diagnostic Indicators: Front-panel LEDs for Power, Module Status, and Bus Activity

• Physical Dimensions: 12.7 cm x 2.5 cm x 20.3 cm

• Weight: 0.50 kg (1.11 lbs)