{"product_id":"aai835-h00-yokogawa-centum-analog-i-o-module","title":"AAI835-H00 Yokogawa CENTUM Analog I\/O Module","description":"\u003ch2\u003eYokogawa AAI835-H00 S1 Isolated Analog Input\/Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AAI835-H00 S1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAAI835-H00\u003c\/strong\u003e Isolated Analog Input\/Output Module, operates as a dedicated hardware component for bi-directional 4-20 mA current signal conditioning and HART protocol pass-through within Yokogawa CENTUM VP and CENTUM CS 3000 DCS platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCode\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAAI835\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003eIsolated Analog Input\/Output Module (4-20 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-H\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHART Support\u003c\/td\u003e\n\u003ctd\u003eIntegrated digital communication for HART smart devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Type\u003c\/td\u003e\n\u003ctd\u003eAlways set to 0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOption Type\u003c\/td\u003e\n\u003ctd\u003eBasic type without explosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eS1 \/ S2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStyle Code\u003c\/td\u003e\n\u003ctd\u003eHardware style release revision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003eAAI835-H00 S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.32 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3.2 cm x 10.7 cm x 13 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax. 360 mA at 5 VDC; 450 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Configuration\u003c\/td\u003e\n\u003ctd\u003e4 Analog Inputs + 4 Analog Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Range\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC (Inputs and Outputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-16 uA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-48 uA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Update Period\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Output Load\u003c\/td\u003e\n\u003ctd\u003e0 to 750 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower-ON Input Resistance\u003c\/td\u003e\n\u003ctd\u003e290 ohm at 20 mA to 450 ohm at 4 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower-OFF Input Resistance\u003c\/td\u003e\n\u003ctd\u003e500 kohm or higher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e500 VAC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHART Protocol \u0026amp; Channel Isolation Performance\u003c\/h3\u003e\n\u003cp\u003eThe module superimposes 4-20 mA HART loop protocol digital communication across all input and output channels without disturbing analog process variables. Individual channel isolation prevents ground loop interference and protects backplane logic from field voltage spikes. Integrated transmitter loop power delivers a minimum of 15.0 VDC at 20 mA, while output loops actively support load resistances up to 750 ohm.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What happens to the module input impedance during a complete 24 VDC power loss?\u003c\/p\u003e\n\u003cp\u003eA: During normal operation, the input resistance varies between 290 ohm and 450 ohm depending on loop current. Upon total loss of system power, internal switching shifts the input circuit impedance to 500 kohm or higher, preventing excessive loading on field loops.\u003c\/p\u003e\n\u003cp\u003eQ: How does the hardware handle open-circuit conditions on analog output loops?\u003c\/p\u003e\n\u003cp\u003eA: The onboard diagnostic circuitry continuously scans output channels for open loops. When loop current drops below 0.65 mA, the module triggers a circuit-open detection alarm and transmits diagnostic status bytes to the DCS controller over the internal system bus.\u003c\/p\u003e\n\u003cp\u003eQ: Which terminal interface hardware connects field wiring to the module?\u003c\/p\u003e\n\u003cp\u003eA: Field connections route through pressure-clamp terminal blocks, dedicated KS1 interface cables, or 40-pin MIL connector cable assemblies tied to ATI3S or ATI3D terminal boards via ATK4A or ATB3A adapters.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the module into a designated rack slot on the Yokogawa FIO base unit. Ensure the top and bottom retention mechanism latches completely into the backplane to prevent contact resistance build-up.\u003c\/p\u003e\n\u003cp\u003eWhen routing analog signal wiring, route twisted shielded pair cables through isolated cable trays separated by at least 100 mm from high-voltage AC lines. Connect the cable shield drain wire directly to the cabinet signal ground bar at a single point to prevent ground loops. Verify that total loop resistance on output channels remains within the 0 to 750 ohm operating window before energizing field transmitters.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":67662352875619,"sku":"AAI835-H00","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/909._364aaada-7c3a-475b-9f77-7c1b3b9d19ab.jpg?v=1791421718","url":"https:\/\/www.autocontrolglobal.com\/products\/aai835-h00-yokogawa-centum-analog-i-o-module","provider":"AutoControl Global","version":"1.0","type":"link"}