{"product_id":"honeywell-51301880-100-thermocouple-multiplexer-terminal-board","title":"Honeywell 51301880-100 Thermocouple Multiplexer Terminal Board","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell 51301880-100\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e51301880-100\u003c\/strong\u003e Thermocouple Multiplexer Terminal Board, operates as a dedicated hardware component for low-millivolt signal termination and field thermocouple signal conditioning within Honeywell LE PIU, Experion PKS, and TDC 3000 network 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\u003e51301880-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\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\u003e1.6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard terminal board footprint\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\u003ePassive field termination assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Assembly Reference\u003c\/td\u003e\n\u003ctd\u003e51301881-100 Rev E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eThermocouple Multiplexer Terminal Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Input Type\u003c\/td\u003e\n\u003ctd\u003eLow-millivolt Thermocouple Signals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 16 thermocouple inputs (with relay board)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold Junction Compensation\u003c\/td\u003e\n\u003ctd\u003eIntegrated Cold Junction Reference (CJR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003ePanel or rack-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Interface\u003c\/td\u003e\n\u003ctd\u003eScrew terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePCB Construction\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade PCB with protective conformal coating\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 board features an integrated Cold Junction Reference (CJR) block designed to perform precise temperature compensation directly at the field wiring interface point. Internal channel-to-channel isolation pathways decoupling thermocouple signals reduce ground loop interference and mitigate common-mode noise across all 16 input channels. The circuit board layout maintains thermoelectric EMF stability before routing multiplexed analog voltage signals through 4-20 mA HART and millivolt processing stages within the host system card cage.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is thermal gradient error minimized across the field terminal blocks?\u003c\/p\u003e\n\u003cp\u003eA: Cold Junction Compensation (CJC) thermistor circuitry is embedded in close physical proximity to the screw terminal rows, continuously measuring local block temperature to correct millivolt offset calculations in real time.\u003c\/p\u003e\n\u003cp\u003eQ: Does the terminal board require an external power supply for signal processing?\u003c\/p\u003e\n\u003cp\u003eA: No, the 51301880-100 is a passive field interface board that draws required reference voltage directly from the interconnected low-energy Process Interface Unit (LE PIU) or relay card assembly.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the assembly on a flat enclosure panel or standard rack frame using ground-bonded mounting hardware to establish continuous earth ground.\u003c\/li\u003e\n\u003cli\u003eRoute thermocouple extension wire pairs directly to designated terminal screw blocks, taking care to observe correct wire polarity (+ and - leads) for the specified thermocouple type.\u003c\/li\u003e\n\u003cli\u003eEnsure shield drain wires are tied to the local grounding bar at one point only to avoid introducing ground loops into millivolt signal paths.\u003c\/li\u003e\n\u003cli\u003eVerify all terminal block screws are torqued according to cabinet wiring standards to prevent resistance shifts at contact points.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":67667035717941,"sku":"51301880-100","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/51301880-100.png?v=1791603126","url":"https:\/\/www.5gplc.com\/products\/honeywell-51301880-100-thermocouple-multiplexer-terminal-board","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}