{"product_id":"1771-ik-allen-bradley-plc-5-series-encoder-counter-module","title":"1771-IK Allen-Bradley PLC-5 Series Encoder\/Counter Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IK\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771IK\u003c\/strong\u003e Encoder\/Counter Module Assembly, operates as a dedicated hardware component for high-speed pulse processing and position tracking within Allen-Bradley PLC-5 systems.\u003c\/p\u003e\n\u003ch3\u003eModule Configuration \u0026amp; Variants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771-IK\u003c\/strong\u003e: Standard dual-slot encoder\/counter module assembly supporting 12-24 VDC input logic and 5 VDC open-collector outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771IK\u003c\/strong\u003e: Equivalent spare hardware identifier denoting the double-slot pulse acquisition module for 1771 universal I\/O chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical \u0026amp; Electrical 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\u003e1771-IK\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\u003e0.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e7.6 x 27.9 x 15.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e6.0 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Input Frequency\u003c\/td\u003e\n\u003ctd\u003e50 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e12-24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e5 VDC Open-Collector (0.5 A per output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Requirement\u003c\/td\u003e\n\u003ctd\u003e2 Slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Update Period\u003c\/td\u003e\n\u003ctd\u003e1.3 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e1.2 A at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHigh-Speed Processing \u0026amp; Deterministic Execution\u003c\/h3\u003e\n\u003cp\u003eThe module processes high-speed quadrature encoder signals up to 50 kHz, transferring updated position counts across the backplane bus communication velocity architecture every 1.3 ms. Direct internal hardware registers process pulse streams without taxing processor scan cycles. The internal board design maintains firmware flash compatibility across host PLC-5 controllers, optimizing overall I\/O density scaling across complex multi-axis motion configurations.\u003c\/p\u003e\n\u003ch3\u003eShipping Package Content\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1771-IK Dual-Slot Encoder\/Counter Assembly\u003c\/li\u003e\n\u003cli\u003e2 x Field Wiring Arm Alignment Keying Bands\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Mounting \u0026amp; Wiring Rules\u003c\/h3\u003e\n\u003ch4\u003eDual-Slot Chassis Installation\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInsert keying bands into two adjacent 1771 backplane connectors matching the dual-card guide spacing.\u003c\/li\u003e\n\u003cli\u003eSlide the double-width assembly smoothly along upper and lower card guides until both rear backplane connectors lock completely into position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEncoder Signal Shielding and Wiring\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConnect quadrature encoder signals using individually shielded, twisted-pair cables.\u003c\/li\u003e\n\u003cli\u003eGround cable shields at a single point on the chassis frame ground to eliminate circulating ground loop currents.\u003c\/li\u003e\n\u003cli\u003eMaintain physical isolation between encoder signal wiring and high-power AC motor drives or contactor lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Operational FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat maximum input pulse frequency does the 1771-IK support?\u003c\/p\u003e\n\u003cp\u003eThe module processes incoming encoder pulse streams up to a maximum frequency of 50 kHz across its input channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow many I\/O slots are required in the 1771 chassis for this assembly?\u003c\/p\u003e\n\u003cp\u003eThe physical footprint of the 1771-IK requires two adjacent slots within a standard 1771 universal I\/O chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat current does the module draw from the 5 VDC backplane bus?\u003c\/p\u003e\n\u003cp\u003eThe assembly draws a continuous operating current of 1.2 A at 5 VDC directly from the backplane power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the update refresh rate of the module internal register data?\u003c\/p\u003e\n\u003cp\u003eThe module updates its internal position counters and transfers data to the processor backplane every 1.3 ms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat electrical specification applies to the onboard outputs?\u003c\/p\u003e\n\u003cp\u003eThe module features 5 VDC open-collector outputs rated for a maximum current capacity of 0.5 A per channel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the module be inserted or removed under backplane power?\u003c\/p\u003e\n\u003cp\u003eNo. Disconnect backplane system power prior to insertion or removal to prevent electrical damage to backplane connector pins.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat field operating voltage range is required for encoder signals?\u003c\/p\u003e\n\u003cp\u003eThe module input stage is designed to interface with field signals operating within a 12 to 24 VDC voltage window.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire size range is compatible with the field wiring terminals?\u003c\/p\u003e\n\u003cp\u003eThe corresponding field terminal block accepts solid or stranded copper wire sizes ranging from 14 AWG to 22 AWG.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066443518125,"sku":"1771-IK","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1771-ik_1.jpg?v=1786891472","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1771-ik-allen-bradley-plc-5-series-encoder-counter-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}