{"product_id":"ad203mh-foxboro-i-a-series-high-input-analog-module","title":"AD203MH Foxboro I\/A Series High-Input Analog Module","description":"\u003ch2\u003eFoxboro AD203MH I\/A Series High-Input Analog Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eFoxboro AD203MH\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAD203MH\u003c\/strong\u003e High-Input Analog Module, operates as a dedicated hardware component for high-density analog signal conditioning and data acquisition within Foxboro I\/A Series platforms.\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\u003eAD203MH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFoxboro\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\u003e0.27 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Foxboro I\/A Series Form Factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax 8.5 W per non-fault-tolerant module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Count\u003c\/td\u003e\n\u003ctd\u003eUp to 32 analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Signal Types\u003c\/td\u003e\n\u003ctd\u003eVoltage (-32 V to +32 V), Current (-20 mA to +20 mA), RTDs, Thermocouples, Potentiometers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Resolution\u003c\/td\u003e\n\u003ctd\u003e16-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.1% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Input\u003c\/td\u003e\n\u003ctd\u003e24 VDC (supports redundant supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnboard Memory\u003c\/td\u003e\n\u003ctd\u003e16 MB SDRAM, 32 MB Flash\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Support\u003c\/td\u003e\n\u003ctd\u003eFault-tolerant configuration requires dual modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e5% to 95% RH non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCold Junction Compensation and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eFoxboro AD203MH\u003c\/strong\u003e executes 16-bit analog signal conversion across 32 configurable input channels, accepting direct field wiring for voltage, current loop, RTD, thermocouple, and potentiometer signals. Integrated cold junction compensation (CJC) circuits maintain thermal measurement stability when processing low-millivolt thermocouple inputs. Robust channel-to-channel isolation prevents ground loop interference across mixed field loop configurations, maintaining 4-20 mA HART loop protocol signal purity while transferring digitized process values to the DCS backplane.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is fault tolerance achieved with the AD203MH module?\u003c\/p\u003e\n\u003cp\u003eA: Fault tolerance requires installing a dual-module pairing in a redundant baseplate structure, allowing automatic failover execution without interrupting signal sampling.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module require external signal conditioning for potentiometer inputs?\u003c\/p\u003e\n\u003cp\u003eA: No. Onboard excitation and scaling circuitry process potentiometer signals directly through the 16-bit analog converter channels.\u003c\/p\u003e\n\u003cp\u003eQ: How does the unit protect against power supply interruptions?\u003c\/p\u003e\n\u003cp\u003eA: Dual 24 VDC power feed terminals utilize internal diode logic to draw operating current continuously from either active bus bar.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Power Removal\u003c\/strong\u003e: Isolate all 24 VDC power sources supplying the chassis before inserting or removing the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Wire Attachment\u003c\/strong\u003e: Connect a heavy-gauge copper bonding conductor directly from the module chassis grounding terminal to the central cabinet earth bus bar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Cable Shielding\u003c\/strong\u003e: Terminate overall and individual pair cable shields at the designated cabinet grounding rail to minimize high-frequency electromagnetic noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Separation Rules\u003c\/strong\u003e: Route sensitive analog signal cables in separate conduit or wire channels away from AC power lines and inductive motor loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaseplate Engagement\u003c\/strong\u003e: Slide the module along the enclosure guide rails until the backplane connector locks firmly into the mating socket.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":43841664516195,"sku":"AD203MH","price":190.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/172_7a0cb820-2840-4c2f-b85a-ad74b9b86c08.jpg?v=1763434746","url":"https:\/\/www.autocontrolglobal.com\/products\/ad203mh-foxboro-i-a-series-high-input-analog-module","provider":"AutoControl Global","version":"1.0","type":"link"}