{"product_id":"3500-50e-bently-nevada-tachometer-module-3500-series","title":"3500\/50E Bently Nevada Tachometer Module 3500 Series","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 3500\/50E\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50E\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTachometer Module, operates as a dedicated hardware component for high-precision rotational speed processing within Turbine Supervisory Instrumentation (TSI) networks. The device reads pulse inputs from speed transducers and processes these variables into accurate status metrics for machine monitoring and overspeed signaling.\u003c\/p\u003e\n\u003ch3\u003eModule 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\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3500\/50E\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\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\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.24 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5.5 x 29 x 23 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 to +65 deg C (-4 to +150 deg F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eStorage Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-30 to +85 deg C (-22 to +185 deg F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHumidity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e95%, non-condensing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Supply\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15-30 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Impedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 k ohms (standard)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMagnetic Pickup (MPU) Input\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 VAC to 50 VAC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProximity Probe Input\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-2 VDC to -18 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMeasurement Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.1 RPM to 99,999 RPM\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAccuracy\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eplus\/minus 0.1% of reading\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTransducer Conditioning and Rotor Dynamics\u003c\/h3\u003e\n\u003cp\u003eThe 3500\/50E accepts inputs from proximity sensors and magnetic pickups to interpret micro-second event pulses generated by target keyways or gear teeth. When utilizing a proximity probe setup, the internal circuits maintain proper eddy-current probe scaling across the target profile. Field technicians must complete gap voltage validation (-10 VDC targets) on the associated displacement probes to ensure the speed sensor operates reliably without triggering false pulse edge drops or signal distortions that disturb critical rotor dynamics speed calculations.\u003c\/p\u003e\n\u003ch3\u003eModule Technical FAQ\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 3500\/50E tachometer support live hot-swap replacement within an energized 3500 monitor rack?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The 3500 rack architecture allows for the extraction and insertion of individual monitor modules under backplane power. However, pulling the active 3500\/50E module interrupts the speed loop logic, which drops the channel status into a NOT OK state and disengages any speed-dependent alarm voting.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module handle signal conditioning differently between a passive MPU and an active proximity sensor input?\u003c\/p\u003e\n\u003cp\u003eA: The module changes its internal hardware threshold limits based on configuration selection. For Magnetic Pickups (MPU), it accepts an unpowered AC waveform from 1 VAC to 50 VAC. For proximity probes, it interfaces with active negative DC voltage ranges from -2 VDC to -18 VDC, managing the high input impedance to track sharp voltage transitions cleanly.\u003c\/p\u003e\n\u003cp\u003eQ: What is the programmatic effect on the output metrics if the actual machine speed drops below the 0.1 RPM lower range limit?\u003c\/p\u003e\n\u003cp\u003eA: When the shaft rotation frequency falls below 0.1 RPM, the internal timer circuits register an under-range condition. The processed output registers as 0.0 RPM, and the module remains in a normal state unless explicit zero-speed or underspeed logic profiles have been assigned to trip an alarm relay.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModule Insertion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAlign the circuit board with the chassis channel slot inside the 3500 rack and push the unit home until it hooks cleanly with the backplane connectors. Hand-tighten the front panel retention screws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShield Ground Separation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConnect the coaxial or twisted-pair transducer signal shields directly to the chassis ground terminal block on the rear I\/O module. The shield wire must float at the sensor housing end to suppress electromagnetic interference and prevent ground loop noise injection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRoute the pulse transducer wiring runs away from high-voltage motor cables and power control lines to prevent induced cross-talk from simulating false speed counts on the 20 k ohm high-impedance inputs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTerminal Contact Integrity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure field wiring connections are torqued down smoothly to avoid high-resistance paths that reduce signal amplitude below the minimum threshold levels required for stable tracking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping Package Composition\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Inclusions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOne 3500\/50E tachometer module processor block fitted with a standard front panel display configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSeparated Hardware Components:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe companion rear input\/output (I\/O) module, internal barriers, proximity probes, and external magnetic pickups must be specified and purchased as separate line items.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLogistics and Dispatch Processing\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFulfillment Protocol:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDelivery time: 2-7 days when payment finish, routed through high-priority air logistics handling managed via DHL, FEDEX, or UPS.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Enclosure Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eShipped inside heavy-duty anti-static industrial packaging complete with shock-damping cellular foam beds to secure the delicate input processing filters against electrostatic discharge (ESD) and kinetic travel stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026892902573,"sku":"3500\/50E","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/bently-nevada-3500-50-133388-02-tachometer-module-imcpuszdr4d.jpg?v=1764225507","url":"https:\/\/www.maxwellplc.com\/products\/3500-50e-bently-nevada-tachometer-module-3500-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}