Product Description

The 9905-968 is a rugged, industrial-grade 6-channel analog input module from the Woodward LinkNet series. This module is specifically designed to provide high-precision signal acquisition for distributed control systems (DCS) and turbine management units. By utilizing the Local Operating Network (LON) communication protocol, the 9905-968 enables seamless data integration across a decentralized network, reducing wiring complexity and improving system modularity.

Engineered for extreme reliability, the 9905-968 features six independent 4-20 mA channels capable of monitoring a wide array of field sensors, including pressure transducers, temperature transmitters, and flow meters. With an impressive IP67 environmental rating and an operational temperature range from -40°C to +85°C, this module is built to perform in the harshest industrial conditions, such as offshore platforms, desert power plants, and high-vibration engine rooms.

Technical Specifications

• Manufacturer: Woodward

• Model Number: 9905-968

• Module Series: LinkNet

• Input Channels: 6 Independent Analog Channels

• Input Signal Range: 4–20 mA (Standard industrial current loop)

• Communication Interface: LON (Local Operating Network) Protocol

• Power Requirements: 24V DC Nominal

• Loop Power Configuration: External (Module does not provide internal 24V loop power)

• Measurement Accuracy: High-stability 4-20 mA conversion for precision control

• Operating Temperature: -40°C to +85°C (-40°F to +185°F)

• Ingress Protection: IP67 (Dust-tight and protected against immersion)

• Vibration/Shock: Industrial-grade resistance for turbine/engine mounting

• Physical Dimensions: 29 cm (L) x 18.7 cm (W) x 5 cm (H)

• Net Weight: 1.82 kg (1820g)

• Country of Origin: USA

Application Scenarios

The 9905-968 is a critical component for distributed monitoring in the following sectors:

• Gas & Steam Turbines: Monitoring auxiliary sensor data (lube oil pressure, fuel flow) in a LinkNet-based Woodward MicroNet or Atlas system.

• Reciprocating Engines: High-density temperature and pressure monitoring for large-bore industrial engines.

• Distributed Power Plants: Reducing long-run cable costs by placing the I/O module near the field instruments.

• Marine Propulsion: Reliable signal acquisition in engine rooms requiring IP67 moisture protection.