{"product_id":"8901-457-woodward-32-ch-24vdc-output-card-brand-new","title":"8901-457 Woodward 32-Ch 24VDC Output Card - Brand New","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWoodward 8901-457\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-density discrete output interface designed for Woodward’s legacy and specialized control systems. It provides 32 independent digital output channels, primarily driving external hardware such as interposing relays, solenoids, and visual indicators. By converting low-level processor logic into 24 VDC actuation signals, this module serves as the critical execution layer for turbine governors and distributed control systems (DCS).\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 8901-457 combines high channel counts with optical isolation to maintain signal purity in high-EMI power generation environments.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCatalog Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8901-457\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e32 Optically Isolated Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC Digital\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Capacity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUp to 0.5 A per channel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eModbus Protocol Support \/ Interface Control\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDiagnostics\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOn-board LED Status Indication\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eForm Factor\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRack\/Slot Compatible (8900 Series)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0°C to +60°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.20 lbs (0.6 – 0.9 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCE, UL\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Density Actuation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eA single 8901-457 module manages 32 separate loads. This density eliminates the need for multiple I\/O racks, significantly reducing hardware costs and the total footprint within industrial control cabinets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical Galvanic Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOptical isolation separates the sensitive CPU logic from the noisy field-side power. This barrier prevents ground loops and protects the main controller from inductive back-EMF generated by switching solenoids or relays.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDirect Load Driving:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith an output rating of 0.5 A per channel, the module drives most standard industrial relays and small solenoids directly. This minimizes the requirement for additional signal conditioners or intermediate hardware.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModbus Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module supports Modbus communication protocols, allowing engineers to integrate discrete output status into broader SCADA or third-party monitoring systems without complex proprietary gateways.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReal-Time Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated LED indicators provide instant visual verification of channel status. This feature allows maintenance personnel to troubleshoot field-side wiring faults or logic errors without specialized diagnostic software.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the Woodward 8901-457 drive high-current hydraulic actuators directly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. While the module provides 0.5 A per channel, high-power hydraulic solenoids often require higher inrush currents. We recommend using the 8901-457 to trigger an interposing relay or a dedicated driver module for high-load applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary difference between the 8901-457 and the 5464-643?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 5464-643 is a discrete\u003cspan\u003e \u003c\/span\u003e\u003cem\u003einput\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003emodule designed to monitor signals (like limit switches). In contrast, the 8901-457 is a discrete\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eoutput\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003emodule designed to execute actions (like opening a valve or turning on a lamp).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this module require external 24 VDC power for the outputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. You must provide a clean, regulated 24 VDC field power supply to the module to energize the output channels. The optical isolation ensures that this field power remains completely separate from the internal rack logic power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this model compatible with all Woodward 8900 series racks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 8901-457 is specifically keyed for 8900 series I\/O slots. Ensure your application software and backplane configuration support the 32-channel output mapping before installation.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":43169711423578,"sku":"8901-457","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/221._b4810a46-c7fe-4400-98c6-2ad45c1ec115.jpg?v=1775092539","url":"https:\/\/www.spareoil.com\/products\/8901-457-woodward-32-ch-24vdc-output-card-brand-new","provider":"SpareOil Automation","version":"1.0","type":"link"}