9905-970 | Woodward | LinkNet 6-Channel Analog Input Module

Configured for distributed analog signal acquisition in LinkNet turbine control architectures, the Woodward 9905-970 (9905-970 LinkNet Input Module) provides direct physical/electrical execution of sensor signal conversion.

Hardware Specifications

Actuator Loop Feedback Response

The 9905-970 module functions as a remote node within the LinkNet distributed I/O network, translating field sensor inputs into data packets for the host controller. The module's 33K Ohm input impedance is designed to minimize loading effects on sensitive process instrumentation. Internal circuitry includes transient protection up to 900 VDC to safeguard the module against common electrical surges. To maintain stable actuator loop feedback performance, field cabling must be routed to avoid high-energy electromagnetic interference, and the module address must be correctly synchronized with the network rate group settings in the master controller.

Frequently Asked Questions

Q: What is the primary function of the 24-character LED display on this module?

A: The integrated LED display provides local status indication for the module, including channel activity and error condition reporting, which facilitates diagnostics during field commissioning.

Q: Is this module capable of sustaining operation at the maximum specified temperature of 85 deg C?

A: The module is rated for operation up to 85 deg C. However, ensure that the control cabinet mounting location provides sufficient natural or forced convection to prevent localized heat buildup that could exceed the rated operating temperature at the module surface.

Field Installation Guidelines

1. Mounting: Secure the module within the panel enclosure using the provided mounting holes. Ensure the 14 x 11 x 4 inch footprint allows for appropriate clearance for communication and signal cabling.
2. Wiring: Utilize shielded twisted-pair cabling for the LinkNet trunk connection. Connect the signal leads to the terminal blocks, ensuring that polarities are maintained according to the system wiring diagram.
3. Shielding and Grounding: Terminate cable shields at the designated ground terminal on the control panel to mitigate induced noise and ensure data integrity across the distributed network.
4. Configuration: Set the internal node addressing switches to match the configuration programmed in the host controller’s software before applying power.
5. Validation: After installation, verify the LED display status to confirm the module has successfully established communication with the network trunk.