{"product_id":"ics-triplex-t8451-tmr-24vdc-digital-output-module","title":"ICS Triplex T8451 TMR 24Vdc Digital Output Module","description":"\u003ch2\u003eICS Triplex T8451 TMR 24Vdc Digital Output Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for safety-critical digital load switching in Trusted Safety Instrument System platforms, the \u003cstrong\u003eICS Triplex T8451\u003c\/strong\u003e (\u003cstrong\u003eT8451\u003c\/strong\u003e TMR Digital Output Module) provides direct physical\/electrical execution. Operating on a 24 VDC nominal field and system architecture, the assembly drives up to 40 individual output channels structured across five galvanically isolated power groups. Built-in triplicated control paths execute continuous hardware vote checks to maintain functional safety compliance while eliminating single-point vulnerabilities in mission-critical process loops.\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\u003eT8451\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.13 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e30 cm x 3 cm x 24.1 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-5 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 W Field Supply (1 A per channel), 24 W System Supply (at 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Supply Voltage Range\u003c\/td\u003e\n\u003ctd\u003e20 VDC to 32 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Circuit Type\u003c\/td\u003e\n\u003ctd\u003eFault-tolerant, fully triplicated with optional line monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e40 channels (5 independent groups of 8 outputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e18 VDC to 32 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 VDC to 32 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Withstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e-1 VDC to 40 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current Rating\u003c\/td\u003e\n\u003ctd\u003e2 A per channel (8 A maximum per power group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Common Isolation\u003c\/td\u003e\n\u003ctd\u003eSustained Working: +\/-250 VDC, Maximum Withstanding: +\/-2.5 kVDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurn-on \/ Turn-off Delay\u003c\/td\u003e\n\u003ctd\u003e0.5 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSample Update Time\u003c\/td\u003e\n\u003ctd\u003e0.5 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEvent Resolution\u003c\/td\u003e\n\u003ctd\u003e1 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-Test Interval\u003c\/td\u003e\n\u003ctd\u003e2 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSIL3 Certification and TMR Architecture Execution\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eICS Triplex T8451\u003c\/strong\u003e employs a Triple Modular Redundant (TMR) 2oo3 architecture designed for SIL3 certified safety applications. Internal hardware fault tolerance relies on three parallel processing lanes executing majority logic voting prior to output stage actuation. Comprehensive internal self-test diagnostics execute automatically every 2 minutes to detect dormant faults, while background galvanic isolation up to +\/-2.5 kVDC prevents field-side voltage transients from compromising backplane logic processing. Fail-safe state execution guarantees deterministic de-energization upon critical fault detection.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the maximum switching delay and update performance of the module outputs?\u003c\/p\u003e\n\u003cp\u003eA: Output turn-on and turn-off propagation delays are rated at 0.5 ms, matching the internal sample update time of 0.5 ms. Sequence of Events (SOE) resolution is maintained at 1 ms.\u003c\/p\u003e\n\u003cp\u003eQ: How is field voltage isolation maintained across adjacent channel groups?\u003c\/p\u003e\n\u003cp\u003eA: The module is split into 5 independent power groups of 8 channels each. Sustained field common working isolation is rated for +\/-250 VDC, with maximum transient withstand rating up to +\/-2.5 kVDC.\u003c\/p\u003e\n\u003cp\u003eQ: What are the current loading limits for individual channels and power groups?\u003c\/p\u003e\n\u003cp\u003eA: Each channel supports a maximum continuous current rating of 2 A. However, total aggregate current per 8-channel power group must not exceed 8 A max.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify module chassis engagement along vertical backplane slots within designated Trusted chassis enclosures.\u003c\/li\u003e\n\u003cli\u003eEnsure field wiring terminals adhere to correct polarity across the 18 VDC to 32 VDC external supply range before applying system power.\u003c\/li\u003e\n\u003cli\u003eMaintain strict separation between field supply wiring and sensitive signal buses to limit electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eEnsure external grounding cable continuity matches system earth specs to satisfy +\/-2.5 kVDC surge withstand criteria.\u003c\/li\u003e\n\u003cli\u003eOperate strictly within environmental limits of -5 deg C to 60 deg C and 5% to 95% RH (non-condensing).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":41499332640858,"sku":"T8451","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/T84512.jpg?v=1785230940","url":"https:\/\/www.plcmasters.com\/products\/ics-triplex-t8451-tmr-24vdc-digital-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}