The Woodward 9905-973 Revision L is a high-performance LinkNet distributed I/O module designed to provide eight independent relay contact outputs for industrial turbine and engine control systems. By utilizing the LinkNet digital network, this module allows for the distribution of I/O hardware closer to the field devices, significantly reducing wiring complexity and installation costs. The Revision L hardware features enhanced environmental sealing and robust relay components, ensuring reliable discrete signal switching for alarms, interlocks, and solenoid control in demanding power generation and mechanical drive applications.

Product Q&A

Q1: What is the primary function of the 9905-973 LinkNet module? A1: It acts as a distributed relay interface that receives digital commands over the LinkNet network from a MicroNet or 723PLUS controller and converts them into physical dry-contact closures for external equipment.

Q2: How are the node addresses assigned on a LinkNet network for this module? A2: Addressing is typically handled via a rotary switch or software configuration on the module, allowing the master controller to identify and communicate with the specific 8-channel relay block among other I/O nodes.

Q3: Can the 9905-973 be used in hazardous locations? A3: This specific module is designed to meet various industrial standards; however, you must verify the specific “Class/Division” certifications on the nameplate, as it often requires a protected enclosure for use in Class I, Division 2 environments.

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