{"product_id":"nj15-u1-dw1-1-pepperl-fuchs-varikont-series-inductive-speed-monitor","title":"NJ15+U1+DW1-1 Pepperl+Fuchs Varikont Series Inductive Speed Monitor","description":"\u003cp\u003eThe \u003cstrong\u003ePepperl+Fuchs NJ15+U1+DW1-1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNJ15+U1+DW1\u003c\/strong\u003e Inductive Speed Monitor, operates as a dedicated hardware component for rotational speed evaluation and rotational underspeed monitoring within industrial drive networks.\u003c\/p\u003e\n\u003ch3\u003eModel Designation \u0026amp; Suffix Logic\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNJ\u003c\/strong\u003e: Inductive proximity sensor base technology.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15\u003c\/strong\u003e: 15 mm nominal operating distance threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eU1\u003c\/strong\u003e: Varikont rectangular surface-mountable terminal housing style.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDW1\u003c\/strong\u003e: Integrated speed monitor function block with adjustable frequency evaluation range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-1\u003c\/strong\u003e: Specific contact output arrangement and terminal internal revision code.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Performance Parameters\u003c\/h3\u003e\n\u003cfigure\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\u003eNJ15+U1+DW1-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePepperl+Fuchs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 220 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e40 mm x 40 mm x 118 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-25 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eOperating current \u0026lt;= 25 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Distance\u003c\/td\u003e\n\u003ctd\u003e15 mm (flush mountable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e15 to 60 VDC \/ 15 to 253 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Range\u003c\/td\u003e\n\u003ctd\u003e0.1 Hz to 10 Hz (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eRelay changeover \/ discrete switching output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eNetwork Signal Isolation and Protective Interface Compliance\u003c\/h3\u003e\n\u003cp\u003eIntegrated filtering electronics suppress transient voltage line spikes across industrial control loops. The rigid Varikont housing maintains high DIN-rail mounting stability when using accessory brackets, ensuring surge voltage protection limits remain effective while keeping protocol conversion latencies and signal propagation delays negligible when interfacing with downstream intrinsic safety (Ex i) barriers.\u003c\/p\u003e\n\u003ch3\u003eIncluded Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Pepperl+Fuchs NJ15+U1+DW1-1 Inductive Speed Monitor Unit\u003c\/li\u003e\n\u003cli\u003e1 x Varikont Base Terminal Box Mounting Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Instruction Leaflet Sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Directives \u0026amp; Mechanical Mounting\u003c\/h3\u003e\n\u003ch4\u003ePhysical Alignment\u003c\/h4\u003e\n\u003cp\u003eMount the rectangular sensor head facing the metallic target wheel or shaft keyway. Maintain the target clearance within the specified 15 mm sensing window.\u003c\/p\u003e\n\u003ch4\u003eElectrical Terminal Wiring\u003c\/h4\u003e\n\u003cp\u003eRemove the upper housing cover to access internal screw terminals. Wire operational power and load control contacts through the cable gland using shielded control cables.\u003c\/p\u003e\n\u003ch4\u003eFrequency Setpoint Tuning\u003c\/h4\u003e\n\u003cp\u003eAdjust the internal potentiometer to define the lower frequency threshold for underspeed detection. Ensure the target passage rate exceeds the set point during steady-state rotation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHow does the sensor evaluate shaft rotational speed?\u003c\/p\u003e\n\u003cp\u003eInternal electronics calculate pulse frequency generated as metal targets pass the sensing face, triggering the output if speed drops below setpoint.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens to the output contact when the shaft stops rotating?\u003c\/p\u003e\n\u003cp\u003eThe output contact switches to its de-energized fault position when pulse frequency drops below the configured setpoint value.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the device feature a start-up delay override period?\u003c\/p\u003e\n\u003cp\u003eAn integrated start-up delay timer bypasses underspeed tripping during drive acceleration to allow equipment to reach nominal RPM.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the terminal housing head orientation be repositioned?\u003c\/p\u003e\n\u003cp\u003eThe sensing head can be rotated relative to the terminal base block in multiple directions to align with target movement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs direct connection to standard AC supply voltages supported?\u003c\/p\u003e\n\u003cp\u003eUniversal power circuitry accommodates broad AC and DC operating supply ranges without requiring external line conversion transformers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire gauge range fits into the internal terminal chamber?\u003c\/p\u003e\n\u003cp\u003eInternal screw terminals accept solid or stranded conductors up to 2.5 mm square cross-sectional area with cable gland sealing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should cable shielding be terminated for high-noise areas?\u003c\/p\u003e\n\u003cp\u003eGround cable shields at the control panel ground bus bar to prevent electrical noise coupling into the frequency detection circuit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat IP enclosure protection rating applies to this housing assembly?\u003c\/p\u003e\n\u003cp\u003eProperly torqued housing screws and sealed cable glands provide IP67 ingress protection against water and particulate intrusion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pepperl+Fuchs","offers":[{"title":"Default Title","offer_id":47508432519341,"sku":"NJ15+U1+DW1-1","price":487.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/nj15_u1_dw1-1_1.jpg?v=1789090689","url":"https:\/\/www.maxwellplc.com\/ga\/products\/nj15-u1-dw1-1-pepperl-fuchs-varikont-series-inductive-speed-monitor","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}