{"product_id":"ics-triplex-t3431-im-thermocouple-input-assemblies","title":"ICS Triplex T3431-IM Thermocouple Input Assemblies","description":"\u003cp\u003eThe \u003cstrong\u003eICS Triplex T3431-IM\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eT3431-IM\u003c\/strong\u003e Thermocouple Input Assembly, operates as a dedicated hardware component for direct temperature measurement processing within ICS Triplex Regent safety system platforms. The assembly conditions up to 24 differential thermocouple channels, executing signal linearizations in degrees Centigrade or Fahrenheit with customizable downscale burnout detection across high-speed analog multiplexing circuits.\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\u003eT3431-IM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICS Triplex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited Kingdom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +60 deg C (+32 to +140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSafetybus Power: 1.8 load units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e24 differential channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferential Input Resistance\u003c\/td\u003e\n\u003ctd\u003e2M ohms (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput to Chassis Resistance\u003c\/td\u003e\n\u003ctd\u003e1.1M ohms (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBias Current\u003c\/td\u003e\n\u003ctd\u003e100 nA (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Mode Voltage\u003c\/td\u003e\n\u003ctd\u003e7 V maximum with respect to chassis ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Overvoltage Protection\u003c\/td\u003e\n\u003ctd\u003e120 V RMS between any two terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003eStep input: 50 msec max (0-99%); Ramp input: 25 msec max tracking delay (\u0026lt;8 deg C\/ms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal Mode Noise Rejection\u003c\/td\u003e\n\u003ctd\u003e70 dB minimum at 50 Hz or 60\/120 Hz (jumper selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Mode Noise Rejection\u003c\/td\u003e\n\u003ctd\u003e100 dB minimum at 50\/60 Hz; 60 dB minimum elsewhere\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurnout Mode\u003c\/td\u003e\n\u003ctd\u003eDownscale driven\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFault Tolerant Architecture and Galvanic Isolation\u003c\/h3\u003e\n\u003cp\u003eDesigned for SIL3 certification compliance in mission-critical safety instrumented systems, the ICS Triplex T3431-IM module integrates fault-tolerant architecture with comprehensive channel isolation. The board utilizes high-grade galvanic isolation to decouple thermocouple field sensor loops from internal bus logic, suppressing common-mode noise and preventing ground potential differentials from interfering with system operation. Integrated diagnostic routines execute continuous health monitoring, ensuring fail-safe state execution in the event of hardware degradation or field wire failure.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the downscale burnout detection behave when a thermocouple wire breaks?\u003c\/p\u003e\n\u003cp\u003eA: Upon sensing an open circuit condition on a channel, the internal diagnostic circuit drives the conversion output downscale to the minimum full-scale value, triggering configured fail-safe logic routines.\u003c\/p\u003e\n\u003cp\u003eQ: Can normal mode noise rejection frequencies be configured in the field?\u003c\/p\u003e\n\u003cp\u003eA: Yes, normal mode rejection is jumper-selectable on the module board to optimize signal filtering for either 50 Hz or 60\/120 Hz line frequencies.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eVerify that the system backplane and Safetybus power are fully de-energized prior to inserting or extracting the T3431-IM assembly.\u003c\/li\u003e\n\u003cli\u003eEnsure field thermocouple cabling utilizes dedicated shielded twisted pairs, routing shield wires directly to the designated chassis ground bus bars.\u003c\/li\u003e\n\u003cli\u003eConfigure board jumpers for local power line noise rejection frequencies (50 Hz or 60 Hz) before final rack installation.\u003c\/li\u003e\n\u003cli\u003eAlign module card edges with chassis card guides and push firmly until the rear backplane connectors fully seat and lock into place.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ICS Triplex","offers":[{"title":"Default Title","offer_id":53407007867189,"sku":"T3431-IM","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/T83101_a4988bad-3cd4-4ee8-87c7-4fdefd11dde5.png?v=1787732361","url":"https:\/\/www.5gplc.com\/products\/ics-triplex-t3431-im-thermocouple-input-assemblies","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}