{"product_id":"allen-bradley-845t-hc12pfw-1-rotary-encoders","title":"Allen-Bradley 845T-HC12PFW-1 Rotary Encoders","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 845T-HC12PFW-1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e845T-HC12PFW-1\u003c\/strong\u003e Optical Incremental Encoder, operates as a dedicated hardware component for rotary position sensing and velocity feedback within industrial motion control and PLC-based motor platforms. The encoder features a 1\/4 inch diameter shaft, a servo face mount with mounting holes, and an integrated 1 m (3.28 ft) pigtail cable. Powered by a 5 VDC supply, it outputs quadrature Channel A and Channel B signals via a 5 VDC Differential Line Driver (DLD) at a resolution of 1024 pulses per revolution (PPR).\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\u003e845T-HC12PFW-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\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\u003e1.36 kg (3.00 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 845T heavy-duty encoder housing (1\/4 in shaft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 VDC input supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1024 PPR (Pulses Per Revolution)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e5 VDC Differential Line Driver (DLD), Channel A and B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eServo mount with face mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Connection\u003c\/td\u003e\n\u003ctd\u003eIntegrated pigtail cable, 1 m (3.28 ft) length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network Routing \u0026amp; Drive Feedback Execution\u003c\/h3\u003e\n\u003cp\u003eThe 845T-HC12PFW-1 delivers high-resolution quadrature feedback across motion control loops and high-speed counter cards. Onboard optoelectronic sensing tracks mechanical shaft rotation, converting optical pulse transitions into 5 VDC Differential Line Driver output signals. Differential RS-422 signal transmission mitigates common-mode electrical noise and signal distortion over industrial field wiring. Channel A and Channel B quadrature phasing permits high-speed direction sensing and precise position tracking, facilitating deterministic motion synchronization and tight motor velocity control across networked Allen-Bradley drive systems.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What power input voltage and signal output levels are required for the 845T-HC12PFW-1?\u003c\/p\u003e\n\u003cp\u003eA: The encoder operates on a regulated 5 VDC input power supply and outputs 5 VDC RS-422 compatible Differential Line Driver (DLD) square-wave signals on Channel A and Channel B.\u003c\/p\u003e\n\u003cp\u003eQ: How does the differential line driver (DLD) output protect signal integrity over long cable runs?\u003c\/p\u003e\n\u003cp\u003eA: Differential output driver channels transmit complementary true and inverted signals for each channel, allowing differential receiver inputs on motion modules to cancel out common-mode electromagnetic noise.\u003c\/p\u003e\n\u003cp\u003eQ: What mechanical mounting options and shaft dimensions does this model feature?\u003c\/p\u003e\n\u003cp\u003eA: The unit features a standard heavy-duty enclosure with a 1\/4 inch solid shaft and a servo face mount equipped with face mounting holes for direct mechanical coupling.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eAlign the 1\/4 inch encoder shaft with the driven motor or machine shaft, utilizing a flexible coupling to prevent excessive radial and axial shaft loading.\u003c\/li\u003e\n\u003cli\u003eFasten the servo face mounting flange onto the mounting plate using appropriate screws inserted through the face mounting holes.\u003c\/li\u003e\n\u003cli\u003eWire the 1 m pigtail cable conductors to the motion controller or high-speed counter interface block, ensuring correct polarity for 5 VDC power and differential signal channels.\u003c\/li\u003e\n\u003cli\u003eConnect the cable shield drain wire to a single technical earth point at the panel terminal block to prevent high-frequency noise from corrupting quadrature signal pulses.\u003c\/li\u003e\n\u003cli\u003eApply 5 VDC primary power to the encoder and manually verify pulse counting and direction quadrature phasing on the controller interface software.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52739561128216,"sku":"845T-HC12PFW-1","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/845T-HC12PFW-1_Cocoai_c39d6423-ec5e-4a78-b4f8-5ffcff5f3817.jpg?v=1789975176","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-845t-hc12pfw-1-rotary-encoders","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}