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        • Lifecycle status

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          Apter Power can support IC655MDL503 pricing and sourcing enquiries for high-density Series Five input replacements.

        IC655MDL503

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        1001 reviews ｜ Need a Specific Revision?
        Sixty-four selectable positive- or negative-logic 24 VDC inputs are brought into a Series Five rack by General Electric IC655MDL503 through dual D-sub field connectors.
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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 IC655MDL503

        • Manufacturer:
          General Electric
        • Part Number:
          IC655MDL503
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          24 VDC Positive/Negative-Logic 64-Circuit Input Module
        • Stock:
          1
        • Product family:
          Series Five PLC
        • Input logic:
          Positive or negative, wiring selected
        • Input points:
          64
        • Circuit grouping:
          Four groups of 16
        • Operating voltage:
          20–28 VDC
        • Input current:
          5 mA at 24 VDC
        • ON/OFF levels:
          19 VDC ON; 10 VDC OFF
        • Response time:
          2–10 ms in either direction
        • Field connectors:
          Two 37-pin D-sub connectors
        • Internal current:
          136 mA typical; 180 mA maximum
        • Weight:
          1.32 lbs (0.6 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 Logic Polarity Heat Derating Bank LED Selection D-Sub Pinout

        Features:

        • Sixty-four 24 VDC inputs provide high signal density in one Series Five module position.
        • Field wiring selects positive- or negative-logic behavior for the connected input groups.
        • Two 37-pin connectors split the circuits into identifiable halves for cabling and service.
        IC655MDL503 is selected when connectorized high-density wiring is more useful than removable screw terminals; the J1/J2 division therefore matters as much as the sixty-four-point count.

        The front selector changes only which half of the input field is displayed, so an unlit lamp must be interpreted with the selected indicator bank before a channel is declared inactive.

        A replacement plan should preserve connector identity, polarity convention, group references and the programmed input range, then prove each cable half separately.

        General Electric IC655MDL503 24 VDC Positive/Negative-Logic 64-Circuit Input Module may be available for purchase and support from Apter Power.
        General Electric IC655MDL503 24 VDC Positive/Negative-Logic 64-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.

        Choosing the Correct Field Reference

        • Source direction: Connect the group supply and common to match the intended positive- or negative-logic convention.
        • Device check: Confirm whether the field sensor sources or sinks current before assigning it to a bank.
        • Group independence: The four commons allow machine sections to use separate compatible references.
        • Change control: Record the chosen polarity for every group so a later replacement does not reverse its behavior.

        Managing Energized Inputs as Temperature Rises

        • Cabinet temperature: Evaluate the air around the module rather than relying only on the room temperature.
        • On-point count: A high number of energized circuits increases the thermal burden of the dense module.
        • Ventilation: Preserve rack clearances and avoid routing heat-producing conductors across the module face.
        • Operating margin: Compare the actual simultaneous input count with the temperature derating requirement.

        Interpreting the Thirty-Two LED Window

        • Selected half: Check the A–D or E–H switch position before interpreting any indicator.
        • Point comparison: Match the illuminated position with the connector pin and controller input being tested.
        • Address view: Use the upper indicators to confirm the configured starting I/O address when requested.
        • Maintenance record: Note the normal selector position and active-input pattern for later troubleshooting.

        Keeping J1 and J2 Correctly Assigned

        • Cable identity: Label both 37-pin assemblies before either connector is released.
        • Common mapping: Document the four field references and the circuits they serve.
        • Mechanical inspection: Examine pins, shells and strain relief before reconnecting the cable assemblies.
        • Commissioning sequence: Verify the two connector halves separately and then compare all sixty-four controller points.
        Description
        General Electric IC655MDL503 is a Series Five high-density input module providing sixty-four 24 VDC channels with selectable positive- or negative-logic field operation. The circuits are arranged in four sixteen-point groups and connect through two 37-pin D-sub interfaces.

        J1 and J2 divide the field cabling into identifiable halves, which is important for harness design and cabinet documentation. The selected logic convention applies through the referenced group connections, so connector pin assignment and polarity must be considered together.

        Only thirty-two point states are shown at one time; a front selector chooses which channel half appears in the indicator window. The selector changes the display view rather than the input operation, allowing technicians to examine both halves without implying that the unselected channels are disabled.
        Alternative Names
        IC 655 MDL 503 IC655-MDL503 IC655MDL-503 IC655MDLS03 IC655MDL5O3 GE IC655MDL503 GE Fanuc IC655MDL503 Series Five IC655MDL503
        Technical notes
        Preserve the J1/J2 connector identities, four group commons, selected logic direction and starting I/O address. At high cabinet temperature, verify the permitted number of simultaneously energized inputs before return to service.
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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 is positive or negative logic selected for IC655MDL503?
        For an installed IC655MDL503, the wiring of the 24 VDC source and group common establishes the logic direction. Confirm the device polarity and common reference before energizing the bank.
        Why do only thirty-two IC655MDL503 indicators serve sixty-four inputs?
        Before returning IC655MDL503 to service, a front selector chooses which thirty-two circuits are displayed: the A–D half or the E–H half. The LEDs therefore monitor one connector group at a time.
        What should be checked when an IC655MDL503 input works but its LED appears inactive?
        For IC655MDL503, first confirm that the monitoring selector is showing the half that contains the circuit. Then compare the terminal voltage, LED state and configured controller point.
        Can the four IC655MDL503 input groups use different field sources?
        When checking IC655MDL503, yes. Each sixteen-point group has its own common, so the groups may be referenced to separate compatible sources when the cabinet design requires it.
        What must be identified before disconnecting IC655MDL503?
        On IC655MDL503, record the rack address, both connector identities, every group common, the logic direction and the normal selector position. J1 and J2 must not be interchanged.
        How should J1 and J2 be checked after an IC655MDL503 replacement?
        During IC655MDL503 troubleshooting, select each monitored half in turn and stimulate known field points. Compare all four input groups with the controller table rather than testing only the first thirty-two LEDs.
        When must IC655MDL503 channel loading be reduced?
        With IC655MDL503 in service, at elevated ambient temperature, the permitted number of simultaneously energized inputs is reduced. Cabinet ventilation and the actual on-point count must be checked together.

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