{"product_id":"yokogawa-aai135-h50-isolated-current-input-module-8-ch-hart-centum","title":"Yokogawa AAI135-H50 Isolated Current Input Module 8 Ch HART CENTUM","description":"\u003ch3\u003e\u003cstrong\u003eYokogawa AAI135-H50 Product Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e operates as a high-precision analog input module designed for process automation systems.\u003c\/p\u003e\n\u003cp\u003eThis module receives standard 4 to 20 mA DC field signals across 8 isolated channels.\u003c\/p\u003e\n\u003cp\u003eEngineers integrate the \u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e into \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa CENTUM VP\u003c\/strong\u003e integrated production control systems for dependable data acquisition.\u003c\/p\u003e\n\u003cp\u003eEach input channel features full electrical isolation from system logic and adjacent field wiring.\u003c\/p\u003e\n\u003cp\u003eThis strict channel-to-channel isolation eliminates ground loops and protects control networks from high field noise.\u003c\/p\u003e\n\u003cp\u003eThe module supports dual-redundant deployment to ensure continuous process uptime in mission-critical applications.\u003c\/p\u003e\n\u003cp\u003eBuilt-in HART digital communication allows operators to monitor smart field device diagnostics directly through the signal loop.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003eYokogawa\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003eCENTUM VP \/ CENTUM CS 3000 Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnalog Input Module (Current Input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8-channel input, fully channel-to-channel isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Signal Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 to 20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHART Protocol (HART 5\/7 compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAllowable Input Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mA DC maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±16 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Resistance (Power ON)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e290 Ω (at 20 mA) to 450 Ω (at 4 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Resistance (Power OFF)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 kΩ or larger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWithstanding Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 V AC for 1 minute (Input to System, Input to Input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 Hz (-3 dB bandwidth per channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16-bit A\/D conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLinearity Error\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWithin ±0.1% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOperating: 0°C to 60°C; Storage: -20°C to 80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eG3 harsh environment coating, 5% to 95% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise Immunity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConforms to IEC 61000-4-2, 61000-4-3, 61000-4-4, 61000-4-6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExplosion Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-explosion protection rating (Suffix code -50)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.3 kg (approx. 0.66 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Architecture \u0026amp; Engineering Insights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e relies on dedicated transformer isolation technology for each channel circuit.\u003c\/p\u003e\n\u003cp\u003eUnlike multiplexed input cards, individual A\/D converters continuously sample input signals without multiplexing delay.\u003c\/p\u003e\n\u003cp\u003eThis design maintains stable signal conversion under dynamic loop load adjustments.\u003c\/p\u003e\n\u003cp\u003eThe card backplane interfaces directly with \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa Field Control Units (FCU)\u003c\/strong\u003e like AFV30D or AFV40D.\u003c\/p\u003e\n\u003cp\u003eHigh internal input resistance during power-OFF state (500 kΩ) prevents field transmitters from driving unpowered backplane buses.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module securely into designated I\/O slots of the \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa CENTUM\u003c\/strong\u003e base node.\u003c\/li\u003e\n\u003cli\u003eEnsure system power is switched off before inserting or removing modules in non-redundant setups.\u003c\/li\u003e\n\u003cli\u003eUse shielded twisted-pair cables for all 4-20 mA field loop wiring.\u003c\/li\u003e\n\u003cli\u003eConnect signal cable shields directly to the cabinet functional ground terminal.\u003c\/li\u003e\n\u003cli\u003eKeep signal lines separated from high-voltage power lines to minimize electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eVerify terminal block connections against the channel assignment sheet prior to energizing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCommissioning \u0026amp; Maintenance Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHART pass-through enables remote calibration using FieldMate software.\u003c\/li\u003e\n\u003cli\u003eLED status indicators on the front panel provide instant visual diagnostics for channel errors.\u003c\/li\u003e\n\u003cli\u003eSelf-diagnostic routines continuously scan memory integrity and channel conversion health.\u003c\/li\u003e\n\u003cli\u003eField technicians can hot-swap redundant paired modules without interrupting system runtime.\u003c\/li\u003e\n\u003cli\u003eOnline firmware verification guarantees card synchronization inside redundant I\/O nests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Compatibility \u0026amp; Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e integrates seamlessly into the following system environments:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003eYokogawa CENTUM VP\u003c\/strong\u003e System Software Version R5.01 and higher\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003eYokogawa CENTUM CS 3000\u003c\/strong\u003e Control Systems\u003c\/li\u003e\n\u003cli\u003eStandard 8-channel terminal blocks (Model TEA16, TAI16, or pressure clamp terminals)\u003c\/li\u003e\n\u003cli\u003eRedundant node configurations via paired \u003cstrong style=\"color: #0056b3;\"\u003eAAI135\u003c\/strong\u003e module placement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCertification \u0026amp; Compliance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCE Mark Conformance (EMC Directive compliance)\u003c\/li\u003e\n\u003cli\u003eEAC Eurasian Conformity Certification\u003c\/li\u003e\n\u003cli\u003eRoHS directive compliant construction\u003c\/li\u003e\n\u003cli\u003eDesigned under ISO 9001 quality management standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePackaging, Warranty \u0026amp; Express Logistics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging List:\u003c\/strong\u003e 1x Factory-Sealed \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e Module, Inspection Certificate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Terms:\u003c\/strong\u003e Complete 12-Month Comprehensive Warranty from ship date\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder Processing Time:\u003c\/strong\u003e Fast dispatch within 24 to 48 hours from stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express Courier Options:\u003c\/strong\u003e Worldwide shipping via FedEx, UPS, and DHL Express\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRefinery temperature and pressure loop monitoring in petro-chemical plants.\u003c\/li\u003e\n\u003cli\u003eFlow meter signal integration in large-scale continuous water treatment facilities.\u003c\/li\u003e\n\u003cli\u003eBoiler drum level control in thermal power generation stations.\u003c\/li\u003e\n\u003cli\u003ePharmaceutical batch reaction monitoring requiring isolated high-accuracy measurements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e features onboard microprocessor-driven diagnostics.\u003c\/p\u003e\n\u003cp\u003eThe module detects wire burnouts when current drops below 3.2 mA.\u003c\/p\u003e\n\u003cp\u003eOver-range protection flags inputs exceeding 21.6 mA.\u003c\/p\u003e\n\u003cp\u003eInternal reference voltage monitoring detects drift before measurement errors affect plant control.\u003c\/p\u003e\n\u003cp\u003eHART diagnostic flags alert operators to transmitter sensor degradation instantly.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eOur automation engineers frequently service installations featuring the \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e module.\u003c\/p\u003e\n\u003cp\u003eField experience shows that ground loops cause over 40% of analog signal instability in legacy plants.\u003c\/p\u003e\n\u003cp\u003eThe strict channel-to-channel isolation of the \u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e eliminates ground loop interference completely.\u003c\/p\u003e\n\u003cp\u003eFor example, in a gulf chemical plant installation, heavy motor starts created transient ground potential shifts.\u003c\/p\u003e\n\u003cp\u003eStandard non-isolated input cards suffered constant loop value spikes.\u003c\/p\u003e\n\u003cp\u003eUpgrading to the \u003cstrong style=\"color: #0056b3;\"\u003eYokogawa AAI135-H50\u003c\/strong\u003e restored stable 4-20 mA readings without adding external signal isolators.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBuying Guide \u0026amp; Selection Advice\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm your control node software supports HART communication modules (\u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e vs non-HART AAI135-S50).\u003c\/li\u003e\n\u003cli\u003eVerify hazardous area requirements; select safety barrier models if field loops enter Class I Div 1 zones.\u003c\/li\u003e\n\u003cli\u003eEnsure correct pairing of terminal blocks (TEA16\/TAI16) to match cabinet wiring standards.\u003c\/li\u003e\n\u003cli\u003eOrder identical model suffix codes when setting up dual-redundant module pairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion 1: What is the primary difference between Yokogawa AAI135-H50 and AAI135-S50?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The \u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e includes HART digital communication support, while the AAI135-S50 provides standard analog 4-20 mA input without HART pass-through capabilities.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion 2: Does the AAI135-H50 support dual-redundant operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Yes, two \u003cstrong style=\"color: #0056b3;\"\u003eAAI135-H50\u003c\/strong\u003e modules can install in adjacent slot positions to form a seamless dual-redundant analog input pair.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion 3: How does the channel isolation benefit field instrumentation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Individual channel isolation prevents noise on one field instrument loop from affecting or corrupting signal readings on adjacent channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion 4: What is the typical field dispatch timeframe for international orders?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Orders ship out within 24 to 48 hours via top express carriers including DHL, FedEx, and UPS.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion 5: What happens to the module signal if field wiring short-circuits?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The card limits field current to protect internal components, generating an over-current diagnostic alarm on the control station screen.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AAI135.png?v=1785736372\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45014044934326,"sku":"AAI135-H50","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AAI135-H50_3_691d6f06-71fa-4eea-b16d-f75c69b96b2a.jpg?v=1785738338","url":"https:\/\/www.plcsparehub.com\/products\/yokogawa-aai135-h50-isolated-current-input-module-8-ch-hart-centum","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}