{"product_id":"125704-01-bently-nevada-3500-series-tmr-relay-module","title":"125704-01 | Bently Nevada | 3500 Series TMR Relay Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 125704-01\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-integrity Triple Modular Redundant (TMR) Relay Module designed for the 3500 Machinery Protection System. This module executes critical voting logic to initiate machinery trips or alarms based on data from associated monitor modules. By utilizing TMR architecture, the 125704-01 provides the highest level of fault tolerance, ensuring that a single relay failure neither causes a nuisance trip nor prevents a legitimate safety shutdown. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New Original\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estock, essential for maintaining SIL-rated safety loops in power generation and oil \u0026amp; gas facilities.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 125704-01 utilizes a specialized compact form factor to facilitate high-density relay voting within the 3500 rack:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada (Baker Hughes)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125704-01\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTMR (Triple Modular Redundant) Relay\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e22.9 cm x 5.1 cm x 10.2 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.4 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRelay Logic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2-out-of-3 (2oo3) Voting Capability\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3500 Rack Rear I\/O Slot\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100% Brand New Original\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFail-Safe TMR Architecture:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 125704-01 implements true 2-out-of-3 voting. This hardware-based logic compares three independent signals; the module triggers the output only when at least two signals agree. This configuration eliminates false shutdowns caused by a single faulty monitor or relay coil.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Response Time:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module’s internal switching circuitry minimizes signal latency. It executes trip commands in milliseconds, ensuring the machinery enters a safe state before vibration or thrust levels reach catastrophic limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe relay contacts provide robust electrical separation between the 3500 rack backplane and external Emergency Shutdown (ESD) circuits. This isolation prevents field-side electrical surges from propagating back into the sensitive processing hardware.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompact I\/O Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMeasuring only 5.1 cm in width, this module allows engineers to install multiple relay units within a single 3500 rack. This high density supports complex protection schemes for multi-train machinery strings without requiring external relay cabinets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVibration-Hardened Interconnects:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned for turbine-deck environments, the 125704-01 features gold-plated contact points and secure mechanical locking. These features prevent intermittent contact issues caused by the harmonic frequencies common in industrial power plants.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 125704-01 differ from a standard 3500\/32 relay module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 125704-01 is specifically designed for TMR (Triple Modular Redundant) applications. While standard modules provide simple relay outputs, the 125704-01 handles the voting logic across three redundant inputs to ensure maximum system availability and safety integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install this module while the 3500 rack is live?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 3500 system supports hot-swapping for I\/O modules. However, you must first bypass or inhibit the associated trip functions in the software to prevent an accidental machinery shutdown during the physical swap of the 125704-01.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 125704-01 require an external termination block?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis module typically serves as the I\/O interface that slides into the rear of the rack. Depending on your 3500 rack configuration (Internal vs. External Termination), you may connect field wiring directly to this module or through an interconnect cable to a separate terminal strip.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is \"Brand New\" condition mandatory for this specific part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRelays have a finite mechanical lifespan defined by the number of switching cycles. A\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBrand New Original\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e125704-01 guarantees that the internal contacts have zero wear, ensuring the unit meets the strict Mean Time Between Failures (MTBF) required for safety-certified machinery protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":53450766811320,"sku":"125704-01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/125704-01.jpg?v=1778319062","url":"https:\/\/www.globalpetroparts.com\/products\/125704-01-bently-nevada-3500-series-tmr-relay-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}