{"product_id":"3500-72m-reciprocating-compressor-machinery-protection","title":"3500\/72M Reciprocating Compressor Machinery Protection","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 3500\/72M-01-00\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a specialized 4-channel monitor within the 3500 Machinery Protection System, specifically optimized for reciprocating compressors. Unlike standard vibration monitors, this module tracks the precise position of the piston rod. It processes signals from proximity probes to provide real-time data on\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003erider band wear\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003erod drop\u003c\/strong\u003e. By identifying mechanical degradation early, the module triggers alarms or protective shutdowns to prevent catastrophic cylinder or liner damage. We supply this product as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original factory stock\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown: 3500\/72M-AXX-BXX\u003c\/h3\u003e\n\u003cp\u003eThe Bently Nevada 3500 series uses a specific alphanumeric logic to define hardware configurations. For the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/72M-01-00\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOption A (01):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eI\/O Module with Internal Terminations. This simplifies rack integration by allowing direct wiring to the I\/O module without external terminal blocks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOption B (00):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo Agency Approval required (Standard configuration).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\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\u003eInput Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 Independent Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTransducer Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada 3300 XL 8mm, 11mm, and NSV Proximity Probes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eI\/O Termination\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eInternal Terminations (Option 01)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10 kΩ\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eScale Factors\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.79, 3.94, or 7.87 mV\/µm (20, 100, or 200 mV\/mil)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Hz to 600 Hz (Peak-to-Peak)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMeasurement Accuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTypical: ±0.33% of full-scale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBuffered Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 Coaxial Connectors (Front Panel)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-40°C to +85°C (-40°F to +185°F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAPI 618, API 670, SIL 2 Capable\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\u003ePrecise Rider Band Tracking:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module calculates rod position relative to the pressure packing or cylinder bore. This allows operators to predict rider band replacement intervals accurately, shifting maintenance from reactive to proactive.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnhanced Signal Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuffered transducer outputs on the front panel allow technicians to connect portable diagnostic equipment without interrupting the primary protection loop or compromising signal integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRuggedized Industrial Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEngineered for the harsh environments of oil refineries and gas processing plants, the module operates reliably up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e+85°C\u003c\/strong\u003e. It resists electromagnetic interference (EMI) commonly found in large-scale motor-driven compressor sets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandardized Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFull compliance with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAPI 670\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eensures this module meets the highest global standards for machinery protection, providing seamless integration into existing plant safety instrumented systems (SIS).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 3500\/72M differ from the 3500\/42M vibration monitor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile both modules reside in the 3500 rack, the 3500\/72M utilizes specific algorithms for rod drop and rod position. It focuses on the DC gap changes and average position of a reciprocating rod, whereas the 42M focuses on dynamic radial vibration and shaft displacement in rotating machinery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the 3500\/72M-01-00 with external termination blocks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The \"-01\" suffix designates internal terminations. If your installation requires external terminal blocks (ETBs), you must select the \"-02\" I\/O module option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat proximity probes are recommended for rod drop measurements?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module most commonly interfaces with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3300 XL 8mm proximity probes\u003c\/strong\u003e. Ensure the scale factor programmed in the 3500 Rack Configuration Software matches the probe and extension cable sensitivity (typically 200 mV\/mil).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this module hot-swappable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, Bently Nevada 3500 modules support hot-swapping within a powered rack; however, you must ensure that removing the module will not trigger an unintended machinery trip if the rack logic handles active protection.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":42894863859802,"sku":"3500\/72M","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/49.1_2a5a8dfe-7cc2-49e8-8653-b2f0bc900568.jpg?v=1770367827","url":"https:\/\/www.spareoil.com\/products\/3500-72m-reciprocating-compressor-machinery-protection","provider":"SpareOil Automation","version":"1.0","type":"link"}