{"product_id":"spw481-for-prosafe-rs-systems-original-yokogawa","title":"SPW481 for ProSafe-RS Systems  | Original Yokogawa","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eYokogawa SPW481\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-performance AC-to-DC conversion unit specifically engineered for the NFBU series racks within Yokogawa’s Distributed Control Systems (DCS) and Safety Instrumented Systems (SIS). It stabilizes 100-120V AC input into a regulated 24V DC rail, powering critical CPU nodes, I\/O modules, and field-bus interfaces. We supply this module as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, featuring advanced environmental protection to ensure uninterrupted operation in corrosive industrial atmospheres.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown: SPW481-53\u003c\/h3\u003e\n\u003cp\u003eYokogawa utilizes a specific coding structure to define environmental and safety protections:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSPW481:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e100-120V AC Input Power Supply Module base model.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e5:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eStandard type with no explosion protection (Industrial grade).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnhanced variant complying with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eISA Standard G3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor corrosion resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eS1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eStyle code representing proven hardware revision for maximum compatibility.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe SPW481 provides substantial output capacity and wide-range thermal tolerance:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eItem\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\u003eInput Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100 – 120 V AC, 50\/60 Hz\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 V DC (Regulated)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Power\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e~150 W (Supports fully populated I\/O racks)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRedundancy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSupports dual-power redundant configurations\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEnvironmental Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eISA Standard G3 (Conformal Coating)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 °C to +70 °C (Extended Range)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCooling Method\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePassive natural convection\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 × 130 × 150 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight \/ Shipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.8 kg \/ 1.5 kg\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\u003cp\u003eThe SPW481 addresses specific vulnerabilities found in petrochemical and heavy industrial power distribution:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eISA Standard G3 Compliance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis module features a specialized conformal coating. This chemical barrier prevents \"whisker\" growth and silver corrosion on circuit traces, which typically occurs in facilities with high concentrations of\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$H_2S$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$SO_2$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003egases.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExtended Temperature Performance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard supplies that fail at +55 °C, the SPW481-53 operates reliably from -20 °C up to +70 °C. This thermal range permits installation in remote outdoor enclosures or unconditioned control rooms without risking system resets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHot-Swappable Maintenance Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module integrates seamlessly into redundant NFBU racks. If a power fault occurs, the secondary unit carries the full load instantly. Maintenance teams can pull the failed module and insert a new unit while the process remains live, ensuring zero interruption to safety interlocks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRegulated Precision for SIS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe SPW481 filters AC line harmonics to deliver a ripple-free 24V DC output. This precision is vital for ProSafe-RS safety systems, where voltage fluctuations could otherwise lead to false trips or sensor signal degradation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use the SPW481 in a 220V AC system?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. The SPW481 is specifically designed for 100-120V AC inputs. For 200-240V AC environments, you must use the SPW482 or PW484 series to ensure hardware safety and proper voltage regulation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the benefit of the \"G3\" specification?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The G3 rating indicates the module can survive \"harsh\" environments defined by ISA-71.04. It is essential for paper mills, wastewater treatment, and refineries where corrosive gases would otherwise destroy standard electronic components within months.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the SPW481 require an external cooling fan?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. The unit utilizes a fanless design with passive convection cooling. This removes a common mechanical failure point and prevents the intake of contaminated air into the module's internal circuitry.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I verify the module's redundancy status?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Each module features a front-panel \"READY\" LED. In a dual-power setup, both LEDs should remain illuminated green. If one extinguishes, the system’s RAS (Reliability, Availability, and Serviceability) software will trigger a diagnostic alarm on the Human Interface Station (HIS).\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44147834519651,"sku":"SPW481","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/59._9f5c6515-f0f7-4b69-99c1-7563de33b1e1.jpg?v=1777430506","url":"https:\/\/www.autocontrolglobal.com\/products\/spw481-for-prosafe-rs-systems-original-yokogawa","provider":"AutoControl Global","version":"1.0","type":"link"}