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        • Lifecycle status

          Active / Available from OEM
          Apter Power can assist with sourcing IC655MDL527 where separately referenced Series Five AC inputs must be maintained.

        IC655MDL527

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        1001 reviews ｜ Need a Specific Revision?
        General Electric IC655MDL527 is a Series Five AC input module with sixteen optically isolated circuits and a separate neutral for every point.
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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.
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        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 IC655MDL527

        • Manufacturer:
          General Electric
        • Part Number:
          IC655MDL527
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          115/230 VAC Isolated 16-Circuit Input Module
        • Stock:
          1
        • Product family:
          Series Five PLC
        • Input isolation:
          Each circuit optically isolated
        • Input points:
          16
        • Operating voltage:
          80–265 VAC
        • Frequency:
          48–63 Hz
        • Input current:
          8.4 mA at 115 VAC; 18 mA at 230 VAC
        • ON/OFF levels:
          80 VAC ON; 30 VAC OFF
        • Response time:
          5–30 ms ON; 10–50 ms OFF
        • Internal current:
          64 mA typical; 100 mA maximum
        • Estimated shipping dimensions:
          3.8 × 25.4 × 12.7 cm
        • 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 Per-Point Isolation Source Separation Channel Lamps Swap Preparation

        Features:

        • Sixteen AC input circuits are optically isolated from one another.
        • A separate neutral for every point supports independent source references.
        • Indicators show circuit state and assist with starting-address confirmation.
        Point-by-point isolation suits installations where field signals originate from different panels, transformers or AC phases and cannot share a group neutral.

        The removable terminal block retains the dense set of input and neutral pairs during electronics replacement, provided every pair is labeled before removal.

        At commissioning, each signal can be checked as its own loop from source through terminal and indicator to the assigned PLC point.

        Apter Power can assist with quotation and sourcing requests for General Electric IC655MDL527 115/230 VAC Isolated 16-Circuit Input Module.
        General Electric IC655MDL527 115/230 VAC Isolated 16-Circuit 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.

        Using Individually Isolated AC Inputs

        • Loop identity: Keep each signal terminal paired with its own neutral from drawing to field label.
        • Phase separation: Confirm source relationships before grouping conductors in a common cable or enclosure.
        • Test reference: Never borrow a neighboring neutral when measuring an isolated point.
        • Fault boundary: Investigate the selected loop first when the other fifteen inputs operate normally.

        Managing Multiple 115/230 VAC Sources

        • Voltage range: Verify each source stays between 80 and 265 VAC at 48–63 Hz.
        • Phase record: Mark the phase or transformer feeding every point before terminal removal.
        • Isolation procedure: De-energize and prove each source separately because one disconnect may not remove all voltage.
        • Re-energization: Restore one loop at a time to expose crossed neutrals or unexpected backfeed paths.

        Interpreting Point and Address Indication

        • Point state: Use the individual LED to confirm that the input electronics detect the applied AC signal.
        • Address mode: Request the starting I/O address when rack mapping is uncertain.
        • Disagreement: A correct LED with an incorrect PLC state points toward address or program assignment.
        • No indication: Check the source, paired neutral and threshold voltage before replacing the module.

        Exchanging an Isolated Input Module

        • Before shutdown: Record slot, address, terminal keying and all source identities.
        • During isolation: Verify absence of voltage on every input/neutral pair, not only the first source.
        • After installation: Prove the sixteen loops separately and compare each result with the I/O table.
        • Final release: Resolve every label, phase and state mismatch before returning the process to service.
        Description
        General Electric IC655MDL527 is a Series Five 16-circuit isolated AC input module for compatible 115 or 230 VAC field devices. Each point has an individual neutral connection, keeping its field reference separate from neighboring channels.

        Per-point isolation supports circuits originating from different machine sections or control feeds without forcing them into shared banks. The wiring consequence is a larger set of distinct line and neutral pairs, making conductor identity central to the module arrangement.

        Individual status lamps show which isolated circuits are active at the rack. When one signal is absent, its own source pair can be checked without assuming a group-wide common failure; simultaneous losses across unrelated points instead suggest a broader supply or configuration issue.
        Alternative Names
        IC 655 MDL 527 IC655-MDL527 IC655MDL-527 GE IC655MDL527 GE Fanuc IC655MDL527 Series Five IC655MDL527 IC655MD1527 IC655MDLS27
        Technical notes
        Treat all sixteen inputs as separate energized AC circuits. Isolate every source, retain each input/neutral pair and verify phase assignments before reconnecting the removable terminal block.
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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 IC655MDL527 inputs use different AC phases?
        When checking IC655MDL527, the separate neutral provided for every input permits different source references when the installation design and safety practices allow them.
        With IC655MDL527 installed, what is the safest way to test one isolated circuit?
        On IC655MDL527, measure only between the selected input and its matching neutral, then compare the reading with that point’s front indicator.
        For a IC655MDL527 installation, how is a wiring fault kept from confusing neighboring inputs?
        During IC655MDL527 troubleshooting, each circuit is optically isolated and has its own neutral, so troubleshooting can remain focused on one input/source pair.
        For IC655MDL527, what should be captured before module exchange?
        With IC655MDL527 in service, record all sixteen input terminals, matching neutrals, source phases, slot position and starting I/O address.
        On IC655MDL527, what does a lit point indicator establish?
        For an installed IC655MDL527, it shows that the module has recognized the AC state on that circuit; the controller mapping still needs checking if the programmed input differs.
        When working with IC655MDL527, can one source feed several isolated inputs?
        Before returning IC655MDL527 to service, a suitable source may feed several points, but every conductor and neutral pair must remain correctly identified and connected.
        During IC655MDL527 troubleshooting, how should the module be returned to service?
        For IC655MDL527, restore sources one at a time, prove the corresponding indicator and PLC point, and only then enable the equipment controlled by that signal.

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