{"product_id":"woodward-9905-971-linknet-discrete-input-module-protocol-gateway","title":"Woodward 9905-971 LinkNet Discrete Input Module Protocol Gateway","description":"\u003ch2\u003eWoodward 9905-971 Rev(K) LinkNet Discrete Input Module and CANbus Protocol Gateway\u003c\/h2\u003e\n\u003cp\u003eConfigured for digital signal acquisition and multi-protocol gateway execution in LinkNet platforms, the \u003cstrong\u003eWoodward 9905-971 Rev(K)\u003c\/strong\u003e (\u003cstrong\u003e9905-971\u003c\/strong\u003e LinkNet Discrete Input Module and CANbus Protocol Gateway) provides direct physical\/electrical execution. Operating within a 24 VDC or 9-36 VDC power range depending on variant configuration, this dual-purpose hardware captures discrete inputs through 8-16 opto-isolated channels or converts SAE J1939, CANopen, and NMEA 2000 protocols across dual ISO 11898-2 CAN ports.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe Woodward 9905-971 Rev(K) hardware platform accommodates two distinct physical build configurations within the LinkNet product architecture:\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSuffix \/ Variant Designation\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003ePhysical Hardware Configuration\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eInput Voltage Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOperating Temperature Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eCommunication Interfaces \/ Channels\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e9905-971 (Discrete Input Variant)\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Digital Signal Acquisition Module\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003ctd\u003e8-16 Opto-isolated Channels, MODBUS RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9905-971 (CANbus Gateway Variant)\u003c\/td\u003e\n\u003ctd\u003eMulti-Protocol Bus Converter \/ Protocol Bridge\u003c\/td\u003e\n\u003ctd\u003e9-36 VDC\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +105 deg C\u003c\/td\u003e\n\u003ctd\u003e2 x ISO 11898-2 (9-pin D-Sub), SAE J1939, CANopen, NMEA 2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e9905-971 Rev(K)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWoodward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard LinkNet Module Dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C (Discrete Input) \/ -40 deg C to +105 deg C (CANbus Gateway)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption \/ Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC (Discrete Input) \/ 9-36 VDC (CANbus Gateway)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDiscrete Input Modules and Protocol Gateways\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Series\u003c\/td\u003e\n\u003ctd\u003eLinkNet Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiscrete Channels\u003c\/td\u003e\n\u003ctd\u003e8-16 Opto-isolated digital input channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAN Ports\u003c\/td\u003e\n\u003ctd\u003e2 x ISO 11898-2 (9-pin D-Sub interfaces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1500 VDC (Power to I\/O) \/ 1500 VDC (Between CAN ports)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocols Supported\u003c\/td\u003e\n\u003ctd\u003eMODBUS RTU, SAE J1939, CANopen, NMEA 2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e10 kbps - 1 Mbps (Gateway variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Resistance\u003c\/td\u003e\n\u003ctd\u003eIndustrial Standard \/ 100 g (6 ms half-sine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHarmonic Distortion Suppression and Thermal Dissipation Profiles\u003c\/h3\u003e\n\u003cp\u003eThe Woodward 9905-971 Rev(K) incorporates optimized thermal heat sink dissipation profiles that enable passive ambient cooling up to +105 deg C in unconditioned outdoor enclosures. The internal power supply circuit minimizes high-frequency harmonic distortion suppression during rapid input voltage swings on 9-36 VDC power buses. Additionally, 1500 VDC galvanic isolation across both CAN ports and power-to-I\/O pathways blocks ground loops and high-voltage transients from affecting core processor operations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the Woodward 9905-971 Rev(K) support discrete signal processing and CANbus gateway conversion simultaneously within a single unit?\u003c\/p\u003e\n\u003cp\u003eA: No. Operating capabilities are determined by the internal hardware assembly variant. The Discrete Input variant processes opto-isolated digital logic signals, while the Gateway variant handles protocol translation across dual CAN ports.\u003c\/p\u003e\n\u003cp\u003eQ: How does the Gateway variant handle multi-protocol CAN networks on shipboard power management platforms?\u003c\/p\u003e\n\u003cp\u003eA: The Gateway variant processes up to 500 Parameter Group Numbers (PGNs) per second, mapping data between SAE J1939 engine control units, NMEA 2000 marine networks, and CANopen system controllers without introducing network latency.\u003c\/p\u003e\n\u003cp\u003eQ: What mounting precautions must engineers take when installing the unit near high-vibration engine machinery?\u003c\/p\u003e\n\u003cp\u003eA: Installers must bolt the chassis to a rigid mounting panel equipped with vibration isolators rated for 100 g shock loads. Torque all 9-pin D-Sub connector screws and secure field terminal block wiring with thread-locking compound.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the module chassis vertically on an equipment panel inside a protective enclosure, maintaining clear space around thermal heat dissipation vents. Route low-voltage 24 VDC or 9-36 VDC power wiring in separate conduits from AC power cables and actuator drive lines to prevent inductive coupling. Ground all shielded twisted-pair cables for CANbus and discrete inputs at a single chassis earth terminal point. Ensure that 120-ohm termination resistors are installed at both physical ends of each CANbus segment before commissioning the system.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":43908860346467,"sku":"9905-971 Rev(K)","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/79_5e3faf3d-669b-449a-8267-341685d7b097.jpg?v=1766481758","url":"https:\/\/www.autocontrolglobal.com\/products\/woodward-9905-971-linknet-discrete-input-module-protocol-gateway","provider":"AutoControl Global","version":"1.0","type":"link"}