{"product_id":"aar181-s50-yokogawa-rtd-input-module-12-channel-isolated","title":"AAR181-S50 Yokogawa RTD Input Module | 12-Channel Isolated","description":"\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #4b0082;\"\u003eAAR181-S50\u003c\/span\u003e\u003c\/strong\u003e is a specialized 12-channel isolated input module designed for high-accuracy temperature acquisition in Yokogawa DCS environments. Our engineering review identifies this unit as a robust solution for Pt100 (3-wire) sensing. It excels in applications requiring strict galvanic isolation to prevent ground loops, ensuring that your critical temperature data remains precise even in high-noise industrial electrical fields.\u003c\/p\u003e\n\n\u003ch3\u003eApplication Suitability and Diagnostic Capability\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSuitable Equipment:\u003c\/strong\u003e Yokogawa CENTUM VP\/CS 3000 Distributed Control Systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCore Applications:\u003c\/strong\u003e Boiler temperature monitoring, heat exchanger optimization, and multi-point process temperature regulation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiagnostic Capability:\u003c\/strong\u003e Features configurable burn-out detection (UP\/DOWN), allowing the system to instantly alert operators to sensor failures or wiring breaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Yokogawa\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #4b0082;\"\u003eAAR181-S50\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInput Type:\u003c\/strong\u003e 12-Channel Isolated RTD (Pt100)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±120 mΩ\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eData Update:\u003c\/strong\u003e 1 second scan cycle\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWiring Limit:\u003c\/strong\u003e ≤40 Ω resistance per wire\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e 1500 VAC (Input to System)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e 450 mA (5 V DC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConfiguration Breakdown (Model: AAR181)\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAAR181:\u003c\/strong\u003e 12-Channel RTD Input Module\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e-S:\u003c\/strong\u003e Standard type\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e5:\u003c\/strong\u003e No explosion protection\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e0:\u003c\/strong\u003e Basic type\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping and Warranty Assurance\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLogistics:\u003c\/strong\u003e Secure international transit via FedEx, UPS, or DHL.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurnaround:\u003c\/strong\u003e Swift processing and dispatch within 24-48 hours.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Industry-leading 12-month quality performance warranty included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEngineering Frequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why is it mandatory to have identical wiring resistance for INA and INC on the AAR181-S50?\u003c\/strong\u003e\u003cbr\u003e\nA: The module performs lead-wire compensation based on the 3-wire RTD principle. Mismatched resistance between these leads will introduce measurement errors directly proportional to the resistance imbalance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How does the module handle temperatures below 0 °C?\u003c\/strong\u003e\u003cbr\u003e\nA: You must apply a correction coefficient (K) based on the thermoelectromotive force ratio; failing to calibrate for these non-linearities at sub-zero ranges can lead to significant process drift.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Selection Guide: When should I choose the AAR181 over an analog universal input module?\u003c\/strong\u003e\u003cbr\u003e\nA: Choose this dedicated RTD module when your loop count is high (12 channels) and your application requires high-density, factory-calibrated isolation specifically for Pt100 sensors to maximize per-channel reliability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does the 60-second burn-out detection time impact safety loops?\u003c\/strong\u003e\u003cbr\u003e\nA: It is a deliberate setting to prevent \"nuisance trips\" caused by transient electrical noise; ensure your control strategy accounts for this detection delay in high-speed emergency shutdown scenarios.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Experience Tip: How can I ensure the most stable readings in noisy plants?\u003c\/strong\u003e\u003cbr\u003e\nA: Keep the total signal source resistance well under the 40 Ω limit and ensure all shielding is grounded at a single, clean instrumentation ground point to minimize temperature drift (±120 mΩ \/10 °C).\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45013886828726,"sku":"AAR181-S50","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AAR181-S50_b078b71b-652b-41d0-bbd9-893230dc290e.jpg?v=1779700312","url":"https:\/\/www.plcsparehub.com\/products\/aar181-s50-yokogawa-rtd-input-module-12-channel-isolated","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}