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        1756-IB16ISOE

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Allen-Bradley 1756-IB16ISOE is a 16-point, individually isolated 24/48 V DC sequence-of-events input module that timestamps field transitions for ControlLogix event analysis.
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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.
        Shipping Mode
        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 1756-IB16ISOE

        • Manufacturer:
          Allen-Bradley
        • Part Number:
          1756-IB16ISOE
        • Product Family:
          ControlLogix
        • Product Type:
          ControlLogix 16-Point Isolated Sequence of Events Input Module
        • Stock:
          1
        • Inputs:
          16 individually isolated
        • Input type:
          24/48 V DC sink or source
        • Operating voltage:
          10 to 55 V DC
        • Nominal voltage:
          24 V DC
        • Cyclic requested packet interval:
          200 μs to 750 ms
        • Change of state:
          Configurable
        • Timestamp accuracy:
          ±100 μs
        • Off-to-on hardware delay:
          10 μs nominal; 20 μs maximum
        • On-to-off hardware delay:
          25 μs nominal; 50 μs maximum
        • Off-state voltage:
          5 V maximum
        • Off-state current:
          1.5 mA maximum
        • On-state current:
          2 mA minimum at 9 V; 5.1 mA maximum at 48 to 55 V
        • Backplane current at 5.1 V DC:
          320 mA
        • Backplane current at 24 V DC:
          2 mA
        • Maximum power dissipation:
          5.5 W at 60°C
        • Isolation voltage:
          250 V continuous input-to-backplane; 125 V continuous input-to-input
        • Compatible RTB:
          1756-TBCH or 1756-TBS6H
        • Module occupancy:
          One slot
        • Operating temperature:
          0 to 60°C
        • Storage temperature:
          -40 to 85°C
        • Dimensions:
          3.5 × 14.2 × 14.5 cm
        • Weight:
          0.2 kg
        • Tariff Code:
          8538900000
        • 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 Event Timing Field Wiring Configuration Application
        • Captures sixteen isolated DC input states with event timestamps
        • Accepts sinking or sourcing 24/48 V DC field circuits
        • Combines channel filtering, change-of-state reporting, and CST-based timing

        1756-IB16ISOE is intended for applications where the order and time of field transitions matter, not merely the latest on/off state. Each input has its own isolation barrier.

        Event quality depends on more than wiring: filter choices, packet timing, CST synchronization, and controller-side record handling must be recreated together when the module is replaced.

        Before installation, confirm the RTB, sink/source polarity, channel assignments, input filters, requested packet interval, CST timing, keying, and the event-processing logic in the controller project.

        Availability, condition, price, and shipping time for 1756-IB16ISOE are confirmed during quotation.

        Allen-Bradley 1756-IB16ISOE ControlLogix 16-Point Isolated Sequence of Events Input 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.

        • Configure change-of-state operation for the channels that require event capture
        • Coordinate CST timing before comparing transitions across modules
        • Account for hardware, firmware, ASIC, and filter delays in event analysis
        • Wire each isolated input with the correct sink/source polarity
        • Use a 1756-TBCH or 1756-TBS6H removable terminal block
        • Keep field voltage within the documented 10 to 55 V DC range
        • Restore channel filters and requested packet interval from the saved project
        • Verify electronic keying and module revision
        • Test controller event-handling logic after the replacement is online
        • Sequence-of-events recording for isolated field contacts
        • Fast transition logging in electrical or process protection systems
        • Time-correlated ControlLogix input analysis across synchronized modules
        Description
        1756-IB16ISOE brings sixteen individually isolated DC inputs and sequence-of-events timestamping into a ControlLogix chassis.

        It accepts 24/48 V DC sinking or sourcing field signals, supports configurable input filtering and change-of-state operation, and records transitions with documented ±100 μs timestamp accuracy.

        System design must align field polarity, RTB selection, input delays, requested-packet timing, CST synchronization, isolation requirements, and the controller logic that consumes event records.
        Revisions

        Revision Part #

        Also known as

        1756-IB16ISOE Ser A
        1756-IB16ISOE/A, Series A, Rev A
        Get Parts Quote
        Alternative Names
        1756-IB16ISOE 1756-IB16ISOE/A Allen-Bradley 1756-IB16ISOE Allen Bradley 1756-IB16ISOE Rockwell Automation 1756-IB16ISOE ControlLogix SOE 1756-IB16ISOE
        Technical notes
        1756-IB16ISOE replacement requires matching RTB, polarity, input filters, change-of-state settings, CST timing, and event logic; incorrect timing configuration can preserve status while corrupting event order.
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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
        When should 1756-IB16ISOE be selected instead of a standard digital input module?
        Select it when the application needs individually isolated 24/48 V DC inputs and sequence-of-events timestamps. Ordinary status monitoring alone may not require the SOE functions.
        Can 1756-IB16ISOE mix sinking and sourcing circuits across isolated channels?
        Yes. Its channels are individually isolated and support sink/source operation, but every channel must follow the correct polarity, voltage range, terminal assignment, and isolation wiring.
        Can the existing field wiring be retained when replacing 1756-IB16ISOE?
        It may be retained only after confirming the 1756-TBCH or 1756-TBS6H RTB, terminal condition, polarity, channel assignment, conductor suitability, keying, and isolation arrangement against the original wiring record.
        Can 1756-IB16ISOE provide reliable event order without a synchronized CST?
        No. Sequence-of-events interpretation depends on the chassis system time, timestamp handling, input filtering, requested packet timing, and controller logic being configured as one coordinated design.
        Why can 1756-IB16ISOE events appear in the wrong order?
        Check CST synchronization, timestamp handling, controller task logic, input filters, network transfer, and rollover processing. Electrical state may be correct even when event reconstruction is not.
        Does 1756-IB16ISOE provide isolation between every input channel?
        Yes. The module is documented as individually isolated, with separate continuous isolation ratings for input-to-backplane and input-to-input circuits.
        Can 1756-IB16ISOE be replaced without checking delay and filter settings?
        No. Hardware, firmware, ASIC, and configurable filter delays affect when transitions are reported. Recreate the original settings before comparing event timing.

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