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        1771-IK

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        Allen-Bradley 1771-IK is a PLC-5 encoder/counter module for counting 12–24 V DC encoder, switch, and optical-sensor signals and controlling preset outputs.
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        Ships by Wednesday, October 28
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 1771-IK

        • Manufacturer:
          Allen-Bradley
        • Part Number:
          1771-IK
        • Product Family:
          PLC-5
        • Product Type:
          Encoder/Counter Module
        • Stock:
          1
        • Maximum Count Frequency:
          50 kHz
        • Counting Modes:
          BCD, binary, quadrature ×2, and quadrature ×4
        • BCD Count Range:
          000 to 999 with carry and borrow
        • Binary Count Range:
          0000 to 4095
        • External Input Supply:
          12 to 24 V DC
        • Input Supply Current:
          110 mA at 12 V DC or 200 mA at 24 V DC
        • Input-Supply Ripple:
          Less than 50 mV peak-to-peak
        • Maximum Output-Load Supply:
          30 V DC
        • Maximum Module Output Drop:
          0.5 V
        • Field-Wiring Arms:
          Two 1771-WB arms
        • Status Indicators:
          Seven
        • Backplane Requirement:
          5 V DC at 1.4 A
        • Limit-Switch Input:
          12 to 48 V DC; 10 mA maximum at 48 V DC
        • Limit-Switch Input Delay:
          16 ms ±7 ms
        • Selectable Input Filtering:
          Mechanical devices up to 50 Hz or high-speed devices up to 50 kHz
        • Chassis Occupancy:
          Two adjacent slots in the same module group
        • Pollution Degree:
          2
        • Overvoltage Category:
          II
        • Maximum Operating Altitude:
          2000 m
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Counting Modes Input Devices Installation Application
        • Accepts pulse, BCD, binary and quadrature counting for high-speed position or event inputs
        • Requires two adjacent 1771 chassis slots within the same module group
        • Uses an external 12–24 V DC input supply matched to the installed encoder or pulse source

        1771-IK is an Allen-Bradley encoder/counter module for high-speed pulse accumulation in a 1771 I/O system.

        Its configurable counting functions include directional and quadrature operation, allowing the controller to receive position or event information that cannot be handled as ordinary discrete inputs.

        Selection must account for two-slot placement, source voltage, signal frequency, filtering and the saved block-transfer configuration.

        Availability, condition, price, and shipping time for 1771-IK are confirmed during quotation.

        Allen-Bradley 1771-IK Encoder/Counter Module Manuals, Datasheets, Links

        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

        • Select BCD, binary, or the documented quadrature counting mode
        • Presets are compared with the accumulated count to control module outputs
        • Marker and limit functions must match the saved processor program
        • The K version is intended for 12–24 V DC encoders and sensors
        • Choose mechanical filtering for switches or high-speed filtering for electronic devices
        • Verify quadrature phase, shielding, and external-supply quality
        • Reserve two adjacent slots within the same I/O module group
        • Use both documented 1771-WB field-wiring arms
        • Confirm input and output supplies, commons, terminal assignments, and grounding before startup
        • Quadrature encoder position counting
        • High-speed optical or proximity-sensor counting
        • Preset-controlled material counting and machine sequencing
        Description
        1771-IK is an Allen-Bradley encoder/counter module that independently accumulates pulses from compatible quadrature encoders, optical counters, switches, and other 12–24 V DC input devices.

        The module detects input frequencies up to 50 kHz, returns the accumulated count to the controller, and compares that count with programmed preset values. Either or both onboard outputs can be activated when the selected preset conditions are satisfied.

        Additional inputs accept an encoder marker signal and a limit-switch signal for home-positioning functions. Count direction can be selected by the controller program or changed directly through compatible external hardware when a faster response is required.

        Before installing or replacing a 1771-IK, confirm the 12–24 V DC external supply, input-device output type, channel pull-up or pull-down selection, input filtering, 1771-WB field-wiring arms, preset and count format, output wiring, chassis placement, and the existing single-transfer or block-transfer program.
        Alternative Names
        1771-IK 1771 IK 1771IK Allen-Bradley 1771-IK Allen Bradley 1771-IK Rockwell Automation 1771-IK PLC-5 1771-IK
        Technical notes
        1771-IK occupies two PLC-5 I/O slots and uses 1771-WB wiring arms; preserve the configured count mode, filters, presets, and output wiring during replacement.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        Can 1771-IK replace a 1771-IJ encoder/counter module without other changes?
        Not automatically. The two variants use different encoder-input supply classes, so verify the installed encoder, external supply, field wiring, filtering, and processor configuration before considering the exchange.
        Can 1771-IK reuse the existing encoder and field wiring from another counter module?
        Reuse is appropriate only when the encoder voltage, A/B phase arrangement, marker and limit inputs, shields, commons, output supply, and both 1771-WB arms match the documented 1771-IK connections.
        Will moving 1771-IK to another slot pair affect the PLC program?
        Yes. The module uses two adjacent slots within one module group, so the processor addressing, block-transfer logic, presets, status references, and physical wiring must follow the new location.
        Which field-wiring arms are required for 1771-IK?
        Rockwell Automation specifies two 1771-WB field-wiring arms. Confirm both arms, terminal labels, connector engagement, and all encoder, limit, marker, output, and supply conductors.
        Can 1771-IK drive its outputs from the same supply as the inputs?
        The outputs can use the external input supply or a separate load supply, but the load supply must stay within the documented limit and share the required common reference.
        What configuration should be recorded before replacing 1771-IK?
        Record the slot pair, counting mode, presets, rollover behavior, filtering, marker and limit functions, output assignments, input voltage, external supplies, and related PLC program logic.
        Why might 1771-IK miss counts after replacement?
        Check the selected filter, encoder voltage, input frequency, quadrature phasing, shield and grounding, marker and limit wiring, external-supply ripple, and restored program configuration.

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