{"product_id":"keyphasor-input-module-bently-nevada-81034-01-3500-series","title":"Keyphasor Input Module | Bently Nevada 81034-01 3500 Series","description":"\u003ch2\u003eBently Nevada 81034-01 Keyphasor Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 81034-01\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e81034-01\u003c\/strong\u003e Keyphasor Input Module, operates as a dedicated hardware component for once-per-turn phase reference and speed measurement within 3500 Machinery Protection System platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e81034-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e500 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 3500 module form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-30 deg C to +65 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eRack backplane supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e2 independent channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Monitoring and TSI Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e81034-01\u003c\/strong\u003e conditions proximity probe signals to generate precise TTL-level pulses, which the monitoring system utilizes for rotor dynamics analysis. Achieving accurate phase measurements requires meticulous eddy-current probe scaling; technicians must ensure the probe remains centered relative to the target notch or keyway to maintain signal consistency. The module performs gap voltage validation, typically referencing the -10 VDC target, to distinguish between legitimate shaft-speed pulses and transducer malfunctions. Furthermore, the dual-channel architecture supports redundant signal acquisition. When installing these modules, engineers must implement effective cross-talk suppression to prevent pulse interference between channels, ensuring that high-speed order tracking remains stable even in environments with significant electromagnetic noise.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the module support hot-swapping during active machinery operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The 3500 series backplane supports hot-swapping the 81034-01. However, operators must place the corresponding monitor channels into bypass mode via software before removing the module to prevent false system trips.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module handle signal degradation on the Keyphasor probe?\u003c\/p\u003e\n\u003cp\u003eA: The module includes logic to detect when the input signal falls outside the programmed voltage thresholds. It flags a \"Not OK\" status in the rack diagnostics if the probe gap deviates significantly from the calibrated operational range.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 81034-01 output signal trigger an external speed control device?\u003c\/p\u003e\n\u003cp\u003eA: The module provides TTL-level conditioned pulses that interface with the 3500 backplane. While it is primarily for protection, the processed speed data is available for external systems via the rack communication gateway.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Seating:\u003c\/strong\u003e Align the module carefully with the 3500 rack backplane connector. Ensure the locking levers engage fully to guarantee low-impedance electrical contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Wiring:\u003c\/strong\u003e Connect probe signal wires to the corresponding I\/O module. Maintain shield continuity to the rack ground bus to reduce susceptibility to electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProximity Gap Setting:\u003c\/strong\u003e Verify the Keyphasor probe gap during installation. Use a voltmeter to confirm that the gap voltage sits within the recommended operational range (typically targeting -10 VDC) at the shaft surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Utilize the 3500 Rack Configuration software to map the two channels. Perform a verification check by rotating the shaft manually to ensure the pulse train registers correctly within the monitoring software.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":43853831667811,"sku":"81034-01","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/219_b1b9c9ec-1928-40af-918e-8ec89fd2a756.jpg?v=1764052349","url":"https:\/\/www.autocontrolglobal.com\/products\/keyphasor-input-module-bently-nevada-81034-01-3500-series","provider":"AutoControl Global","version":"1.0","type":"link"}