{"product_id":"yokogawa-aar181-s50-industrial-automation-module-reliable","title":"Yokogawa AAR181-S50 Industrial Automation Module - Reliable","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Yokogawa AAR181-S50 is a 12-channel isolated RTD input module designed for precise temperature measurement in industrial automation systems. This module accepts Pt100 3-wire RTD signals per IEC751 and JIS C1604 standards, delivering reliable data for process control. With a ±5 V allowable input voltage and a withstand voltage of 1500 VAC between input and system, the AAR181-S50 ensures robust isolation and safe operation in harsh environments.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe table below lists key performance parameters of the Yokogawa AAR181-S50. All values are sourced directly from the product datasheet.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Input Channels\u003c\/td\u003e\n\u003ctd\u003e12, isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal (RTD)\u003c\/td\u003e\n\u003ctd\u003ePt100 (3-wire), JIS C1604:1997, IEC751:1995\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Input Voltage\u003c\/td\u003e\n\u003ctd\u003e±5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage (Input to System)\u003c\/td\u003e\n\u003ctd\u003e1500 VAC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resistance (Power ON\/OFF)\u003c\/td\u003e\n\u003ctd\u003e2 MΩ or larger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy (RTD)\u003c\/td\u003e\n\u003ctd\u003e±120 mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Total Resistance of Signal Source Plus Wiring\u003c\/td\u003e\n\u003ctd\u003e40 Ω or less (per wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Current (RTD)\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift (RTD)\u003c\/td\u003e\n\u003ctd\u003e±120 mΩ \/10 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Update Period\u003c\/td\u003e\n\u003ctd\u003e1 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurn-out Detection Time\u003c\/td\u003e\n\u003ctd\u003e60 s (all channels settable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current Consumption\u003c\/td\u003e\n\u003ctd\u003e450 mA (5 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Connection\u003c\/td\u003e\n\u003ctd\u003ePressure clamp terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Yokogawa AAR181-S50 excels in applications requiring precise, isolated RTD temperature measurements. Common use cases include chemical processing, power generation, and refinery operations where accurate temperature data is critical for safety and efficiency. In dual-redundant configurations, the module’s isolation prevents ground loops and signal degradation, ensuring consistent performance. The 1-second update period suits slow-trend processes, while the burn-out detection (60 s) alerts operators to sensor failures, reducing downtime.\u003c\/p\u003e\u003ch2\u003eInstallation Guidelines\u003c\/h2\u003e\u003cp\u003eProper wiring is essential for accurate readings with the Yokogawa AAR181-S50. Use 3-wire Pt100 RTDs and ensure the wiring resistance per wire does not exceed 40 Ω. The signal cables for INA and INC must have identical resistance to maintain measurement accuracy. Connect the module using the pressure clamp terminals and verify the input voltage stays within ±5 V. For dual-redundant setups, note that the effect of allowable signal source resistance varies; consult the installation manual for precise adjustments.\u003c\/p\u003e\u003ch2\u003eTroubleshooting Common Issues\u003c\/h2\u003e\u003cp\u003eCommon problems with RTD input modules often stem from wiring resistance mismatch or temperature drift. For the Yokogawa AAR181-S50, if readings appear erratic, check that the total wiring resistance is 40 Ω or less per wire. Temperature drift of ±120 mΩ\/10°C can cause minor deviations; account for this in high-accuracy applications. If burn-out does not trigger, verify the setting is enabled and the detection time of 60 s matches your system timing. Always follow the specification that wiring resistance for INA and INC cables must be identical.\u003c\/p\u003e\u003ch2\u003eSelection Guide\u003c\/h2\u003e\u003cp\u003eWhen procuring the Yokogawa AAR181-S50, confirm your system requires a 12-channel isolated RTD module with Pt100 support. Verify that your controller accepts the 1 s update period and 450 mA current consumption. For reliable sourcing, choose PLC Source PRO – we stock the AAR181-S50 and other Yokogawa control system spares. Contact us for bulk pricing or technical support.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default","offer_id":44409417367651,"sku":"AAR181-S50","price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/AAR181-S00_33baaf3e-3343-4c4e-9867-bb4bfc6c1eef.jpg?v=1785153856","url":"https:\/\/www.plcsourcepro.com\/products\/yokogawa-aar181-s50-industrial-automation-module-reliable","provider":"PLC Source PRO","version":"1.0","type":"link"}