{"product_id":"allen-bradley-1771-qb-plc-5-linear-positioning-module","title":"Allen-Bradley 1771-QB PLC-5 Linear Positioning Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1771-QB\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-speed Linear Positioning Module designed for the 1771 Universal I\/O chassis. This module provides precise closed-loop control of hydraulic or electric servo-actuators by interfacing directly with linear displacement transducers (LDTs). It processes position data from industry-standard sensors like MTS Temposonics and Balluff BTL series to execute accurate motion profiles. We supply this unit in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econdition, offering a critical hardware solution for maintaining legacy PLC-5 systems that require high-resolution positioning without upgrading the entire control architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModule Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLinear Positioning Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Transducers:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMTS Temposonics, Balluff BTL, Norstat GYRG\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSampling Period:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2 ms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Output Resolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e12-bit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Output Ranges:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e+\/-10V DC, +\/-20 mA, +\/-50 mA, +\/-100 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiscrete Inputs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10-30V DC (Logic 1), 0-4V DC (Logic 0)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiscrete Outputs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSingle-ended, sourcing (100 mA max)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.6A max @ 5VDC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Arm:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1771-WN (40 terminals)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSlot Width:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1 Slot\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFuse Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3 Amperes, 250 Volts (Normal-Blow)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUnit Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e6.00 lbs (2.72 kg)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe 1771-QB delivers specialized motion control capabilities to the PLC-5 platform through several key engineering features:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Loop Execution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module updates position data every 2 ms per axis. This rapid sampling ensures the controller responds instantly to dynamic changes in the actuator path, maintaining tight tolerances in precision wood processing, metal forming, and plastic injection molding applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVersatile Servo Interfacing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated analog outputs support multiple signal ranges, including high-current +\/-100 mA drives. This versatility allows the 1771-QB to drive various servo valves directly, eliminating the need for external signal conditioners or intermediate amplifiers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Transducer Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe hardware interfaces seamlessly with magnetostrictive transducers from major manufacturers. By supporting multiple LDT protocols, the module allows engineers to utilize existing field instrumentation during system repairs or machine overhauls.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Field Wiring:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1771-WN 40-terminal wiring arm facilitates clean and organized conductor management. The terminal design accommodates up to 14 AWG stranded wire, providing robust electrical connections that withstand the continuous vibration of heavy industrial environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1771-QB require a separate power supply for the transducers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. While the module draws logic power from the 1771 backplane, you must provide external power to the linear displacement transducers and the discrete I\/O circuits according to the sensor manufacturer's specifications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a Brand New original product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We guarantee this 1771-QB is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal stock. For precision motion control, using new hardware ensures that the 12-bit analog-to-digital converters and timing circuits perform with the exact accuracy defined by the original factory calibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a failed 1771-QB without rewiring the system?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. If you currently use a 1771-WN wiring arm, you can swing the arm away, replace the module in the chassis, and reattach the arm. This \"plug-and-play\" capability minimizes downtime and prevents wiring errors during maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhich PLC processors support this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1771-QB operates in any 1771 Universal I\/O chassis controlled by a PLC-5 processor. It occupies a single slot and communicates via the standard I\/O transfer mechanism.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53377011548344,"sku":"1771-QB","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1771-QB.jpg?v=1776762308","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1771-qb-plc-5-linear-positioning-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}