{"product_id":"138700-01-shaft-absolute-i-o-module-bently-nevada-3500-42-interface","title":"138700-01 Shaft Absolute I\/O Module Bently Nevada 3500\/42 Interface","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-193 citation-end-193\"\u003eThe Bently Nevada 138700-01 is a high-precision input\/output interface engineered for the 3500\/42 Proximitor Monitor system.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-192 citation-end-192\"\u003eThis module is specifically tasked with facilitating \"Shaft Absolute\" measurements, a critical diagnostic parameter that combines shaft vibration and casing vibration signals to determine the true motion of the shaft in space.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eBy providing a ruggedized termination point for proximity probes and seismic transducers, the 138700-01 allows the 3500 rack to calculate the absolute displacement of a rotating rotor relative to a free-space reference. This level of monitoring is vital for large-scale turbomachinery where high casing-to-shaft vibration ratios could otherwise mask dangerous mechanical conditions.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Hardware Parameters and Physical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-191 citation-end-191\"\u003eThe 138700-01 is built to industrial standards to ensure low-latency signal routing and long-term durability in high-stress environments.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModule Function:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eShaft Absolute I\/O Interface\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Primary Monitor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBently Nevada 3500\/42 series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Signal Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated proximity and seismic sensor processing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting Requirement:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOccupies one full-height rear slot in the 3500 chassis\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHigh-density screw terminal blocks for secure field wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnhanced protection against ground loops and EMI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUnit Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.38 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Dimensions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e24.13 cm x 2.44 cm x 9.91 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Origin:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUSA (United States)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Warranty:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e12 Months\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIndustrial Usage and System Deployment\u003c\/h3\u003e\n\u003cp\u003eThis I\/O module is a prerequisite for comprehensive machinery protection in heavy industrial facilities, including:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSteam and Gas Turbine Monitoring:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTracking the absolute shaft motion of large turbine trains where casing vibration is significant.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHydroelectric Generators:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProviding accurate rotor position data in environments prone to structural resonance and low-frequency oscillations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePetrochemical Compression Trains:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLinking critical shaft vibration data to the 3500 rack's alarm and trip logic to prevent catastrophic bearing failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePredictive Maintenance Data Centers:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eServing as the high-fidelity signal source for transient data acquisition and specialized machinery diagnostic software.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What exactly does \"Shaft Absolute\" monitoring mean in the context of the 138700-01?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Shaft Absolute monitoring measures the shaft's vibration relative to a fixed point in space by combining signals from a proximity probe (shaft relative to casing) and a velocity sensor (casing relative to space).\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-190 citation-end-190\"\u003eThe 138700-01 provides the inputs necessary to perform this calculation.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this I\/O module be used with the 3500\/42M (Internal Termination) monitor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 138700-01 is designed for External Termination configurations. You must ensure your 3500\/42 monitor is compatible with external I\/O modules before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the terminal block included with the 138700-01?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Typically, the I\/O module includes the terminal blocks for field wiring. However, for some redundant configurations, separate terminal headers might be required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this module require periodic calibration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 138700-01 is a passive interface for signal routing; however, the 3500\/42 main monitor it connects to must be calibrated according to Bently Nevada's recommended machinery protection schedule.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the 138700-01 suitable for hazardous area installations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, when installed within a 3500 rack that utilizes appropriate intrinsic safety (IS) barriers or galvanic isolators, this module can be used to monitor equipment located in classified hazardous zones.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45841130979501,"sku":"138700-01","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/135031-01-3.jpg?v=1774494916","url":"https:\/\/www.maxwellplc.com\/products\/138700-01-shaft-absolute-i-o-module-bently-nevada-3500-42-interface","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}