{"product_id":"2551-1-triconex-digital-input-external-terminator-7400056-110-rev-03-115v","title":"2551-1 | Triconex | Digital Input External Terminator 7400056-110 Rev 03 115V","description":"\u003cp\u003eThe \u003cstrong\u003eTriconex 2551-1 7400056-110 Rev 03\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e2551-1\u003c\/strong\u003e Digital Input External Terminator, operates as a dedicated hardware component for field signal termination and voltage conditioning within Triconex safety-instrumented systems. Configured to interface 115 VAC discrete input signals with system I\/O modules, the assembly conditions high-voltage field contact loops and channels field data directly into safety system backplane architectures.\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\u003e2551-1 \/ 7400056-110 Rev 03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTriconex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Industrial Range (0 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\u003ePassive Termination Panel (0 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e115 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Input External Terminator (DI FTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eTriconex Tricon Safety Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSIL3 Certification and Triple Modular Redundancy Architecture\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-integrity safety applications, this external terminator supports SIL3 certification compliance by routing discrete 115 VAC input loops across triple modular redundancy (TMR) 2oo3 architecture legs. Internal circuit paths maintain strict galvanic isolation and fail-safe state execution boundaries, ensuring that field-side line transients, ground loops, or open-circuit faults do not compromise emergency shutdown logic or cause spurious trips within safety channels.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 2551-1 7400056-110 Rev 03 terminator require external power for operation?\u003c\/p\u003e\n\u003cp\u003eA: No, the assembly operates as a passive field termination interface, routing 115 VAC field loop voltages directly to the matching digital input module backplane without active internal power draw.\u003c\/p\u003e\n\u003cp\u003eQ: Can interface cables be disconnected from the terminator assembly while the system is energized?\u003c\/p\u003e\n\u003cp\u003eA: Uncoupling pre-formed field interface cables under live 115 VAC operating conditions is restricted to prevent electrical shock, arc exposure, or momentary channel interruption on active safety loops.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the external terminator securely onto standard DIN rails or structural backplane mounting plates inside an approved safety cabinet.\u003c\/li\u003e\n\u003cli\u003eVerify that field voltage levels strictly measure 115 VAC prior to landing field contact wires onto the terminal blocks.\u003c\/li\u003e\n\u003cli\u003eEnsure all field signal shield drain wires are terminated continuously to the integrated ground busbar to maintain noise immunity against electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eRoute high-voltage 115 VAC field lines separately from low-voltage DC communication and analog signal cables inside the control enclosure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":67723163369781,"sku":"2551-1  7400056-110","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/2551-17400056-110_Cocoai.png?v=1792137184","url":"https:\/\/www.5gplc.com\/products\/2551-1-triconex-digital-input-external-terminator-7400056-110-rev-03-115v","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}