{"product_id":"1771-ik-allen-bradley-endcoder-counter-module-assembly","title":"1771-IK | Allen-Bradley | Endcoder\/Counter Module Assembly","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IK\u003c\/strong\u003e is a \u003cstrong\u003ePLC-5 Encoder\/Counter I\/O Module\u003c\/strong\u003e designed for high-speed counting and positioning applications. It interfaces with \u003cstrong\u003e12–24V DC encoders\u003c\/strong\u003e and provides \u003cstrong\u003eChannel A, Channel B, and Marker inputs\u003c\/strong\u003e with selectable BCD or Binary output formats for precise motion control in industrial automation systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Encoder \/ Counter I\/O Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform:\u003c\/strong\u003e PLC-5 \/ Bulletin 1771\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEncoder Input Voltage:\u003c\/strong\u003e 12–24 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 1.4 A @ 5 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Channels:\u003c\/strong\u003e Channel A, Channel B, Marker input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Inputs:\u003c\/strong\u003e Limit switch input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Indicators:\u003c\/strong\u003e Output No. 1, Output No. 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e Fault status indication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Format:\u003c\/strong\u003e Selectable BCD or Binary\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation Mode:\u003c\/strong\u003e Block or Single operation mode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 1771 I\/O chassis\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Counting:\u003c\/strong\u003e Designed for encoder and counter signal processing in motion control applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuadrature Input Support:\u003c\/strong\u003e Channel A and Channel B inputs support quadrature encoder signals for direction and position detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarker Input:\u003c\/strong\u003e Dedicated marker input for homing and reference position detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimit Switch Integration:\u003c\/strong\u003e Built-in limit switch input for overtravel protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Output Formats:\u003c\/strong\u003e Selectable BCD or Binary output to match PLC-5 processor data handling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Operation Modes:\u003c\/strong\u003e Block or Single mode selection for different counting applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-Panel Diagnostics:\u003c\/strong\u003e Status LEDs for outputs and fault indication enable quick troubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRotary encoder position feedback\u003c\/li\u003e\n\u003cli\u003eLinear encoder displacement measurement\u003c\/li\u003e\n\u003cli\u003eConveyor belt speed monitoring\u003c\/li\u003e\n\u003cli\u003ePackaging machine position control\u003c\/li\u003e\n\u003cli\u003eCNC machine tool axis feedback\u003c\/li\u003e\n\u003cli\u003eHigh-speed event counting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Power Verification:\u003c\/strong\u003e Ensure the 1771 chassis can supply \u003cstrong\u003e1.4A at 5VDC\u003c\/strong\u003e for this module—significantly higher than standard I\/O modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEncoder Connection:\u003c\/strong\u003e Wire the quadrature encoder's Channel A, Channel B, and Marker signals to the appropriate module terminals. Verify 12–24V DC signal levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimit Switch Wiring:\u003c\/strong\u003e Connect the limit switch input for overtravel protection if required by the application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Configuration:\u003c\/strong\u003e Set the output format selector (BCD or Binary) and operation mode (Block or Single) per application requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding:\u003c\/strong\u003e Use shielded cables for encoder connections to prevent noise interference in high-speed counting applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Check:\u003c\/strong\u003e Power up and verify encoder count accuracy using the PLC-5 programming software diagnostic tools.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What encoder types are compatible with the 1771-IK?\u003c\/strong\u003e\u003cbr\u003e\nA: The module supports incremental encoders with 12–24V DC quadrature outputs (Channel A, Channel B, and optional Marker\/Z-channel).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can the 1771-IK handle absolute encoders?\u003c\/strong\u003e\u003cbr\u003e\nA: No. The 1771-IK is designed for incremental encoders only. For absolute encoder interfaces, specialized modules or communication interfaces are required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum counting frequency?\u003c\/strong\u003e\u003cbr\u003e\nA: Refer to the PLC-5 installation manual for specific counting frequency limits. Proper shielding and cable routing are essential for high-frequency operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is the 1771-IK discontinued?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The 1771-IK is discontinued by the manufacturer. It is available through surplus channels for legacy system maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical:\u003c\/strong\u003e Verify chassis power supply can deliver 1.4A at 5VDC—this is a high-current module\u003c\/li\u003e\n\u003cli\u003eConfirm encoder output voltage (12–24V DC) and signal type (quadrature incremental)\u003c\/li\u003e\n\u003cli\u003eUse shielded, twisted-pair cables for encoder connections to minimize noise\u003c\/li\u003e\n\u003cli\u003eSelect BCD format for compatibility with existing PLC-5 BCD math routines, or Binary for direct processor handling\u003c\/li\u003e\n\u003cli\u003eFor new designs, evaluate Kinetix motion modules or CompactLogix high-speed counter modules\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53803458396344,"sku":"1771-IK","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1771-IK.png?v=1784796198","url":"https:\/\/www.globalpetroparts.com\/products\/1771-ik-allen-bradley-endcoder-counter-module-assembly","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}