WOODWARD 9905-971 LINKNET 16 CHANNEL DISCRETE INPUT MODULE REV k
WOODWARD 9905-971 is rack plug-in marine LinkNet 16-channel discrete input module, designed for Woodward MicroNet parallel control and turbine governor distributed I/O system, widely fitted onboard offshore vessels, heavy-lift ships and marine power platforms for digital status signal collection and safety contact monitoring. This marine input module accepts 24VDC dry contact and discrete switching signals from field sensors, limit switches and protective relays, transmits the digital status data back to the main MicroNet controller over LinkNet fieldbus network for diesel engine and turbine parallel operation supervision.

The marine LinkNet module integrates 16 independent galvanic isolated input channels, surge protection circuit, watchdog monitoring and front panel status LED indicators, supports channel configuration, fault logging and emergency trip interlock logic for marine rotating machinery safety supervision. Its discrete input acquisition & hardware diagnostics function continuously monitors 24V DC power supply, field sensor wiring and backplane bus integrity, detects signal loss, cable fault and hardware failure, transmits I/O module fault alerts and machinery operating status to vessel AMS alarm console. The discrete input acquisition & hardware diagnostics ensures reliable field contact signal gathering for Woodward MicroNet marine machinery governor control system. It enables reliable marine 9905-971 LinkNet discrete input module operation under heavy vessel vibration and salt mist marine environments.

This Woodward 9905-971 discrete input module delivers stable marine 16-channel digital input performance installed inside vessel engine control cabinet. The discrete input acquisition & hardware diagnostics adopts marine-grade PCB substrate with EMC shielding against electromagnetic interference and mechanical shock. Marine propulsion technicians rely on marine Woodward module operation to test each input channel, verify contact signal capture and check LinkNet bus communication during routine maintenance. It adopts rack edge plug-in connector design for straightforward spare replacement and minimal marine turbine/gen-set control system downtime. Internal circuit boards use conformal coating to protect electronic components against salt mist, condensation and temperature fluctuation. It works cooperatively with Woodward MicroNet main controller and ship integrated alarm monitoring system. It is widely used as distributed I/O spare hardware for Woodward marine vessel turbine and diesel generator parallel speed control system maintenance and retrofit projects.