{"product_id":"bently-nevada-3500-72m-01-00-3500-series-rod-position-monitor","title":"Bently Nevada 3500\/72M-01-00 3500 Series Rod Position Monitor","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eMonitoring reciprocating compressor performance requires specialized measurement channels, which is the primary function of the \u003cstrong\u003eBently Nevada 3500\/72M-01-00\u003c\/strong\u003e. This four-channel monitor accepts inputs from proximity transducers, processes the signals to continuously measure shaft and rod position, and compares the processed signals with user-programmable alarms. Designed specifically for integration into the \u003cstrong\u003e3500 Series Machinery Protection System\u003c\/strong\u003e, this module utilizes the \u003cstrong\u003e01 I\/O option\u003c\/strong\u003e, which provides internal terminations to streamline direct field wiring connections without requiring external termination blocks. This specific variant does not carry regulatory agency approval certifications (Option 00), making it ideal for non-hazardous industrial environments or standard panel topologies.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour-Channel Architecture:\u003c\/strong\u003e Accepts up to four independent proximity transducer inputs for comprehensive rod drop and position measurement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Terminations (Option 01):\u003c\/strong\u003e Reduces cabinet space requirements and installation complexity by allowing field wiring to connect directly to the I\/O module.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReal-Time Diagnostics:\u003c\/strong\u003e Continuously performs self-tests and status checks on the transducers, cabling, and internal processing circuitry.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Configuration:\u003c\/strong\u003e Programmable alarm setpoints, alert\/danger delays, and channel bypass options configured via the 3500 Rack Configuration Software.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Backplane Interface:\u003c\/strong\u003e Communicates directly with the 3500 Keyphasor modules and system controllers for high-speed synchronization.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003ePiston rod wear (rod drop) monitoring in reciprocating compressors.\u003c\/li\u003e\n  \u003cli\u003eCrosshead guide and plunger position measurement.\u003c\/li\u003e\n  \u003cli\u003eHyper-compressor rod displacement and alignment tracking.\u003c\/li\u003e\n  \u003cli\u003eReciprocating machinery protection in chemical processing and gas transmission facilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #1a365d;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBently Nevada (Baker Hughes)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3500\/72M-01-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eRod Position Monitor\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eChannels\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e4 channels per module\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eI\/O Module Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e01 (Internal Terminations)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eAgency Approval\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e00 (None \/ No Approvals)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eSignal Processing\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAnalog-to-Digital, DSP-enabled rod position algorithms\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eNominal 7.7 Watts (typical)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-30 to +65 Celsius (-22 to +149 Fahrenheit)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModule Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.91 kg (2.0 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2.0 kg (4.4 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #1a365d;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eTerminal Point \/ Port\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eFunction \/ Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCh 1 to Ch 4 (Sig, Com, VT)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTransducer input connections (Signal, Common, Transmitter Voltage)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eBuffered Outputs (Front Panel)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eCoaxial dynamic signal connectors for diagnostic or analyzer instruments\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eChassis Ground Stud\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eProvides low-impedance connection to protective earth system\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 3500\/72M replaces or interfaces alongside older legacy non-M configurations (such as the standard 3500\/72). However, it requires minimum 3500 Rack Configuration Software version 4.0 or higher to access the enhanced processing metrics. If migrating from external termination systems to internal terminations (Option 01), ensure cabinet depth clearances can accommodate direct wiring loops without exceeding minimum bend radii for transducer cables.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo prevent measurement drift in rod position tracking, the physical alignment of the Proximitor sensors relative to the rod must be calibrated at dynamic operating temperatures. Because thermal expansion can skew \"cold\" baseline values, always program clearance offsets into the configuration. Do not route low-voltage sensor cables alongside heavy-duty drive motor supply lines to avoid electrical interference on the high-frequency displacement calculations.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen wiring to the internal terminal strip on the 3500\/72M-01-00, ensure the cable shields are grounded only at the 3500 rack ground point. Multi-point grounding can establish ground loops, introducing noise that distorts the delicate millivolt signal from the proximity sensors. Keep wiring clean and verify that terminal block screws are torqued exactly to manufacturer specifications to maintain long-term signal integrity under vibration.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL WARNING\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003eDisconnect all power sources and verify the machinery protection rack is fully de-energized before inserting or removing the 3500\/72M monitor or its corresponding I\/O module. Static discharge can permanently damage internal solid-state components. Wear an ESD wrist strap connected to a verified ground point during installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eVerify slot alignment within the 3500 rack. The main monitor module must slide into the front slot directly corresponding to the rear slot where the I\/O module with internal terminations is installed.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eGently insert the I\/O module into the rear slot of the rack. Tighten the two securing screws on the faceplate to ensure continuous ground contact with the rack chassis.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eConnect Proximitor field wiring to the corresponding internal termination terminals (Ch 1 - Ch 4). Keep cable routing separate from high-power distribution lines.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003ePower up the 3500 rack and connect via the configuration interface to verify proper channel detection, system status lights, and correct voltage offsets.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52668298297707,"sku":"3500\/72M-01-00","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/350072m-01-00-uzf1wzfwezb_f7fb10d7-8347-4de6-bdd1-de39555b8461.jpg?v=1765520477","url":"https:\/\/www.plcprotech.com\/fa\/products\/bently-nevada-3500-72m-01-00-3500-series-rod-position-monitor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}