{"product_id":"yokogawa-sai533-h33-prp-safety-analog-input-module","title":"Yokogawa SAI533-H33\/PRP Safety Analog Input Module","description":"\u003carticle\u003e\n\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSAI533-H33\/PRP\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a safety-rated analog input module developed by Yokogawa for deployment within the ProSafe-RS safety instrumented system. It is engineered to acquire and process critical analog field signals with high integrity while supporting PRP (Parallel Redundancy Protocol) networking to eliminate single points of failure at the communication layer.\u003c\/p\u003e\n\u003cp\u003eDesigned for use in high-risk industrial environments, this module delivers deterministic performance, robust diagnostics, and long-term operational stability required for certified safety loops.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFunctional Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSAI533-H33\/PRP\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides sixteen independent analog input channels, each electrically isolated to prevent fault propagation and signal interference. The module is optimized for standard 4–20 mA current signals commonly used by safety transmitters measuring pressure, flow, level, and temperature.\u003c\/p\u003e\n\u003cp\u003eIntegrated PRP functionality compliant with IEC 62439-3 allows the module to operate on dual Ethernet networks simultaneously, ensuring zero-time recovery from network failures. Combined with ProSafe-RS system redundancy, this architecture supports SIL2 and SIL3 applications when correctly configured.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Technical Advantages\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eHigh-density 16-channel analog signal acquisition in a single safety module\u003cbr\u003eNative PRP support for seamless network-level redundancy\u003cbr\u003eHigh-resolution A\/D conversion for accurate process value representation\u003cbr\u003eComplete channel-to-channel and channel-to-system isolation\u003cbr\u003eOnline replacement capability without stopping the safety controller\u003cbr\u003eBuilt-in diagnostics covering input status, wiring faults, and internal health\u003cbr\u003eClear front-panel LED indicators for maintenance and troubleshooting\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eElectrical and Performance Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eInput signal type: 4–20 mA current (safety transmitter compatible)\u003cbr\u003eNumber of inputs: 16 isolated channels\u003cbr\u003eA\/D conversion: 16-bit resolution typical of the SAI series\u003cbr\u003eInput impedance: Optimized for loop-powered field devices\u003cbr\u003eIsolation rating: Channel-to-channel and channel-to-bus galvanic isolation\u003cbr\u003ePower supply: Logic and field power supplied via ProSafe-RS baseplate\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eNetwork and Safety Compliance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eNetwork protocol: PRP (Parallel Redundancy Protocol)\u003cbr\u003eStandard reference: IEC 62439-3\u003cbr\u003eSafety integrity: Suitable for SIL2 \/ SIL3 safety functions in redundant systems\u003cbr\u003eDiagnostics coverage: Supports safety integrity calculations and proof testing\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eEnvironmental and Mechanical Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eOperating temperature range: 0 °C to 55 °C\u003cbr\u003eStorage temperature range: −40 °C to 70 °C\u003cbr\u003eRelative humidity: 5–95% non-condensing\u003cbr\u003eCooling method: Natural air convection\u003cbr\u003eInstallation: ProSafe-RS FIO baseplate slot\u003cbr\u003eMaintenance: Hot-swap supported under system power\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEmergency shutdown systems (ESD)\u003cbr\u003eFire and gas detection systems (F\u0026amp;G)\u003cbr\u003eCritical process interlocks in oil \u0026amp; gas and petrochemical plants\u003cbr\u003eTurbine and boiler protection systems in power generation\u003cbr\u003eHigh-availability safety loops requiring network redundancy\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the benefit of PRP in the SAI533-H33\/PRP?\u003c\/strong\u003e\u003cbr\u003eA: PRP allows the module to communicate over two independent Ethernet networks simultaneously, providing uninterrupted data flow even if one network fails.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module be used in non-redundant systems?\u003c\/strong\u003e\u003cbr\u003eA: While the module can operate in various architectures, SIL2\/SIL3 certification requires use within a properly designed redundant ProSafe-RS system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the module limited to 4–20 mA inputs only?\u003c\/strong\u003e\u003cbr\u003eA: The primary supported signal type is 4–20 mA, which aligns with most safety-rated field transmitters used in SIS applications.\u003c\/p\u003e\n\u003c\/article\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":42880766214234,"sku":"SAI533-H33\/PRP","price":264.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/SAI533-H33PRP2.jpg?v=1770263321","url":"https:\/\/www.plcmasters.com\/it\/products\/yokogawa-sai533-h33-prp-safety-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}