{"product_id":"liftmaster-k2a0878","title":"LiftMaster K2A0878 Hall-Effect \/ RPM Encoder Board — SL3000U \/ UL","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster K2A0878 is the Hall-effect \/ RPM encoder board identified in SL3000U-series service information for the operator’s internal motion-feedback system. The associated RPM cup is a separately numbered component, so the electronic sensing board and the rotating target should be checked independently. Match the complete operator generation and installed board reference before ordering. This board is not an external photo eye, a main control board or a universal sensor for all LiftMaster gate and garage door equipment.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSL3000U\u003c\/td\u003e\n\u003ctd\u003eManufacturer repair diagram identifies this encoder board.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSL3000UL\u003c\/td\u003e\n\u003ctd\u003eConfirm the applicable revision specifies the same reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLegacy Omni SL3000\u003c\/td\u003e\n\u003ctd\u003eDifferent control generations require their own service parts check.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK13-32087 RPM cup\u003c\/td\u003e\n\u003ctd\u003eSeparate rotating feedback component, not the electronic board.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidential RPM sensors\u003c\/td\u003e\n\u003ctd\u003eDifferent application and service references.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eDiagnose Feedback and Mechanical Movement Together\u003c\/h2\u003e\u003cp\u003eA drive-feedback fault can arise from the sensor, its connection, associated wiring or a mechanism that is not moving correctly. Have the technician inspect these together before choosing the kit. A stalled motor or binding gate can prevent the expected feedback even when the sensing component itself remains serviceable. Record diagnostic behavior rather than assuming every motion-related fault requires a new sensor.\u003c\/p\u003e\u003cp\u003ePhotograph the installed encoder, RPM cup and connections before service. Compare the actual arrangement with the correct SL3000 generation’s drawing, particularly if earlier repairs changed the electronics. Restore the specified sensing position and wiring without improvising brackets or bypassing feedback. After replacement, complete the prescribed setup and observe the complete operating cycle with the required protection devices functioning.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eK2A0878\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent\u003c\/td\u003e\n\u003ctd\u003eHall-effect \/ RPM encoder board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented platform\u003c\/td\u003e\n\u003ctd\u003eSL3000U; verify UL revision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeparate feedback component\u003c\/td\u003e\n\u003ctd\u003eK13-32087 RPM cup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eInternal drive feedback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelection basis\u003c\/td\u003e\n\u003ctd\u003eExact model, board reference and sensing arrangement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRead the complete SL3000 model and encoder label.\u003c\/li\u003e\n\u003cli\u003eMatch K2A0878 in the correct generation’s drawing.\u003c\/li\u003e\n\u003cli\u003eInspect the RPM cup, connections and actual drive movement.\u003c\/li\u003e\n\u003cli\u003eConfirm current board-package contents and post-service tests.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis offer identifies the K2A0878 encoder board. The K13-32087 RPM cup, motor, main control board, complete harness and operator are not promised as included. Confirm supplied mounting or connection pieces in the current service package. A feedback fault can require more than one repair, but neighboring parts in the service drawing remain separate purchasing decisions unless expressly included.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: Gate drives contain hazardous electrical energy and exposed moving parts. Feedback-sensor service requires a qualified gate technician.\u003c\/li\u003e\n\u003cli\u003eIsolate all applicable power and secure the gate before accessing the sensor or control enclosure.\u003c\/li\u003e\n\u003cli\u003eNever bypass feedback, limits or protection inputs to force a faulty operator to run. Correct the underlying problem.\u003c\/li\u003e\n\u003cli\u003eRestore guards and verify travel, reversal and every required protection device before returning the entrance to normal use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-rpm-sensor-assembly\"\u003e041C4398A residential RPM sensor\u003c\/a\u003e — a different application; not a substitute for this SL3000 encoder board.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — external protection where approved; it does not replace internal motion feedback.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the RPM cup included?\u003c\/h3\u003e\u003cp\u003eIt is a separately numbered component and is not promised with this board offer.\u003c\/p\u003e\u003ch3\u003eDoes it replace the main control board?\u003c\/h3\u003e\u003cp\u003eNo. It is the internal encoder-board service item.\u003c\/p\u003e\u003ch3\u003eWill it fit a residential opener?\u003c\/h3\u003e\u003cp\u003eNo cross-application compatibility is established.\u003c\/p\u003e\u003ch3\u003eDoes a feedback error prove the board is defective?\u003c\/h3\u003e\u003cp\u003eNo. Connections, the cup and actual drive movement need diagnosis.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"Controlled products","offers":[{"title":"Default Title","offer_id":60723265929502,"sku":"K2A0878","price":103.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/k2a0878.jpg?v=1793244718","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-k2a0878","provider":"garage-doorparts.com","version":"1.0","type":"link"}