{"product_id":"aar181-s50-rtd-input-module-yokogawa-centum-vp-aar181","title":"AAR181-S50 RTD Input Module Yokogawa CENTUM VP AAR181","description":"\u003ch2\u003eYokogawa AAR181-S50 RTD Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for multi-point RTD temperature signal conditioning in CENTUM VP control systems, the \u003cstrong\u003eYokogawa AAR181-S50\u003c\/strong\u003e (\u003cstrong\u003eAAR181\u003c\/strong\u003e RTD Input Module) provides direct physical signal processing across 12 isolated field channels.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eAAR181-S50 (Base Model: AAR181)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa Electric Corporation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e22 x 124 x 126 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e450 mA at 5 VDC backplane supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Type\u003c\/td\u003e\n\u003ctd\u003ePt100 RTD (3-wire, JIS C1604:1997, IEC 751:1995)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e12 channels (individually isolated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 120 mOhm (approx. +\/- 0.1 deg C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Current\u003c\/td\u003e\n\u003ctd\u003e1 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC for 1 minute (channel-to-system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePermissible Line Resistance\u003c\/td\u003e\n\u003ctd\u003e40 Ohm maximum per conductor line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and Signal Isolation Features\u003c\/h3\u003e\n\u003cp\u003eThe AAR181-S50 processes low-level resistance variations from Pt100 sensors while isolating field wiring from system backplane electronics. Integrated channel-to-system isolation limits common-mode voltage transfer across long sensor runs in process plant environments. Temperature measurement accuracy relies on balanced 3-wire lead resistance compensation across the INA and INC conductor lines to reject line resistance drift. Each channel features configurable sensor burnout detection (UP\/DOWN selection) with a 60-second fault cycle, allowing process automation controllers to maintain predictable trip states during open-circuit element failures.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What installation precautions must engineers observe regarding RTD wiring resistance?\u003c\/p\u003e\n\u003cp\u003eA: Technicians must ensure that the wiring resistance of conductor lines INA and INC remains strictly equal and does not exceed 40 Ohm per conductor. Unbalanced lead resistance directly introduces offset errors into the internal bridge measurement calculations.\u003c\/p\u003e\n\u003cp\u003eQ: Can the AAR181-S50 module undergo hot-swapping during active system operation?\u003c\/p\u003e\n\u003cp\u003eA: Engineers can insert or remove the AAR181-S50 module under powered backplane conditions within Yokogawa field control stations, provided the surrounding system slot configuration permits online module replacement without interrupting adjacent I\/O bus communications.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the AAR181-S50 vertically within a protected IP20 minimum-rated enclosure to ensure proper thermal dissipation across the module chassis. Technicians must land 3-wire Pt100 field connections onto the matching pressure clamp terminal block using shielded twisted-pair cables. Ground the overall cable shield at a single dedicated instrumentation earth bar inside the cabinet rather than floating the shield at both ends. Route low-level RTD wiring through dedicated terminal trunks physically segregated from high-voltage AC power feeds or inductive motor drive cables to suppress electromagnetic interference.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43787209932890,"sku":"AAR181-S50 RTD","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/561_a0437dc5-5cd8-452b-8b38-8c5ff3f64dda.jpg?v=1785895305","url":"https:\/\/www.spareoil.com\/products\/aar181-s50-rtd-input-module-yokogawa-centum-vp-aar181","provider":"SpareOil Automation","version":"1.0","type":"link"}