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          Apter Power can assist with pricing and sourcing IC655MDL501 for maintenance of a negative-logic Series Five input position.

        IC655MDL501

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        1001 reviews ｜ Need a Specific Revision?
        A two-bank, 16-point interface for 24 VDC negative-logic field signals, General Electric IC655MDL501 provides isolated group returns and a removable Series Five terminal assembly.
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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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        Technical specifications for IC655MDL501

        • Manufacturer:
          General Electric
        • Part Number:
          IC655MDL501
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          24 VDC Negative-Logic 16-Circuit Input Module
        • Stock:
          1
        • Input type:
          Negative logic DC
        • Input points:
          16
        • Circuit groups:
          Two isolated groups of 8
        • Field voltage:
          12–24 VDC
        • Input current:
          7 mA at 12 VDC; 15 mA at 24 VDC
        • Response time:
          3–10 ms OFF to ON; 3–12 ms ON to OFF
        • Status indication:
          Logic-side LED per point
        • Internal load:
          64 mA typical; 80 mA maximum
        • Weight:
          1.43 lbs (0.65 kg)
        • 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 24 VDC Source Match Two-Bank Indication Signal Fault Tracing Terminal Returns

        Features:

        • Sixteen negative-logic DC inputs occupy one Series Five rack position.
        • Two eight-point banks provide separate common terminals for field-circuit organization.
        • A removable terminal block preserves conductor order during a controlled module exchange.
        IC655MDL501 suits a smaller negative-logic installation where two independently referenced banks are preferable to the additional density of a thirty-two-point module.

        When eight neighboring signals disappear together, the bank common and its field source deserve attention before individual channels; a single missing point suggests a different fault path.

        Keeping the removable terminal assembly in conductor order reduces migration risk, but the replacement still has to preserve the original logic direction and starting address.

        General Electric IC655MDL501 24 VDC Negative-Logic 16-Circuit Input Module may be available for purchase and support from Apter Power.
        General Electric IC655MDL501 24 VDC Negative-Logic 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.

        Matching IC655MDL501 to Field Circuits

        • Logic convention: Confirm the machine uses negative-logic inputs before replacing an existing module.
        • Supply arrangement: Each group may share a compatible source or use a separate source where circuit separation is required.
        • Common reference: Trace the group common first when several points fail together.
        • Controller fit: Preserve the original Series Five rack position and configured starting address.

        Using the Front Indications During Checks

        • Point comparison: Compare each indicator with the actual sensor or contact state before changing controller logic.
        • Address check: Use the displayed assignment to confirm that maintenance is observing the intended I/O block.
        • Group pattern: Several inactive indicators in one bank usually justify checking its shared field supply and common.
        • Controlled test: Exercise inputs individually and record the controller response before returning the machine to service.

        Separating Wiring, Addressing and Module Faults

        • No indication: Measure the field signal at the terminal and verify polarity before suspecting the electronics.
        • Indication only: When an LED responds but the PLC value does not, recheck the rack assignment and starting address.
        • Bank-wide loss: Inspect the affected eight-point common and supply path rather than replacing sixteen field devices.
        • Safe recovery: Remove field power before reseating the terminal block, then repeat a documented input test.

        Preserving the Field Connections

        • Identification: Mark every conductor and its group before releasing the removable block.
        • Keying: Retain the mechanical key arrangement so an incompatible module type cannot accept the block unnoticed.
        • Conductor loading: Keep terminals secure and avoid placing unsupported wiring strain on the connector.
        • Commissioning: Restore one group at a time and verify every input against the controller indication.
        Description
        General Electric IC655MDL501 is a Series Five 16-circuit negative-logic input module for compatible 12–24 VDC field signals. Its points are arranged in two banks of eight, with a separate common connection for each bank and a removable terminal assembly for field wiring.

        Negative-logic operation makes the relationship between the field source and the bank common essential to signal interpretation. A missing common can remove an entire eight-point section, whereas a single inactive channel more directly indicates a device, conductor or terminal issue.

        Point indicators show the detected input states and the module can present its assigned starting address at the rack. Together with the removable terminals, these features help relate the programmed input range to the physical bank without treating all sixteen circuits as one undivided wiring group.
        Alternative Names
        IC 655 MDL 501 IC655-MDL501 IC655MDL-501 IC655MDLS01 IC655MDL5O1 GE IC655MDL501 GE Fanuc IC655MDL501 Series Five IC655MDL501
        Technical notes
        Isolate field power before removing the terminal block. Preserve the two group-common circuits, negative-logic polarity, rack position and starting I/O address, then validate every affected safety or machine function under controlled conditions.
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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
        How do I confirm an IC655MDL501 input is reaching the PLC?
        When checking IC655MDL501, compare the field-device state with the matching front indicator. If the indicator changes but the controller state does not, verify the configured I/O address and rack assignment before disturbing field wiring.
        What should be checked when all eight inputs in one IC655MDL501 group stay off?
        On IC655MDL501, start at that group’s common terminal and its 12–24 VDC supply. A missing common or group supply can disable eight points together even when individual conductors are intact.
        Can IC655MDL501 use separate field supplies for its two input groups?
        During IC655MDL501 troubleshooting, yes. Each eight-point group has its own common, so the groups may use separate compatible DC supplies when the wiring design requires isolation between field circuits.
        Which wiring and addressing details should be captured before an IC655MDL501 replacement?
        With IC655MDL501 in service, capture the rack position, starting I/O address, group-common wiring and every terminal designation. Reproduce those conditions on the replacement before controlled point-by-point testing.
        How should the IC655MDL501 terminal block be handled during service?
        For an installed IC655MDL501, de-energize field power, identify every conductor, and use the removable block without forcing the mechanical keying. The key arrangement should remain matched to the input module type.
        Which field voltage is appropriate for IC655MDL501?
        Use a 12 to 24 VDC source that remains within the module’s stated operating limits under load. Confirm polarity because IC655MDL501 is a negative-logic input module.
        What does an IC655MDL501 address indication help verify?
        For IC655MDL501, it helps confirm the module’s starting I/O address during installation or troubleshooting. Match that indication to the controller configuration before diagnosing an apparent channel fault.

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