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        • Lifecycle status

          Active / Available from OEM
          Apter Power can assist with sourcing IC655MDL533 for connectorized, high-density Series Five TTL input systems.

        IC655MDL533

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Selectable TTL logic and a pair of 37-pin connectors enable IC655MDL533 to concentrate sixty-four low-level digital inputs in one Series Five module.
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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 IC655MDL533

        • Manufacturer:
          General Electric
        • Part Number:
          IC655MDL533
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          5/12 VDC TTL Positive/Negative-Logic 64-Circuit Input Module
        • Stock:
          1
        • Product family:
          Series Five PLC
        • Input points:
          64
        • Logic:
          Positive or negative, selected by wiring
        • Circuit grouping:
          Four groups of sixteen
        • Operating voltage:
          4.75–13.2 VDC
        • Input current:
          2.5 mA at 5 V; 7.5 mA at 12 V
        • ON/OFF levels:
          4.0 VDC ON; 2.0 VDC OFF
        • Response time:
          1–4 ms ON and OFF
        • Field connectors:
          Two 37-pin D-sub connectors
        • 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 Connector Assignment TTL Polarity Display Banks Logic Proof Test

        Features:

        • Sixty-four TTL inputs are organized as four sixteen-point groups.
        • Positive or negative logic is selected by the external source wiring.
        • Two 37-pin connectors and a selectable indicator bank support high-density field wiring.
        The high point count suits panels where compact rack occupancy matters and the field design already uses connectorized low-voltage signal harnesses.

        Separate group commons permit flexible source organization, while the J1/J2 arrangement keeps the two halves of the input map physically distinct.

        The selectable indicator bank helps technicians inspect all sixty-four points without expanding the front-panel footprint, but it makes bank identification essential during testing.

        Apter Power can assist with quotation and sourcing requests for General Electric IC655MDL533 5/12 VDC TTL Positive/Negative-Logic 64-Circuit Input Module.
        General Electric IC655MDL533 5/12 VDC TTL 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.

        Managing J1 and J2 Signal Banks

        • Cable identity: Label both 37-pin plugs before removal and keep their orientation records with the rack drawing.
        • Group layout: Map A/B and C/D to one connector bank and E/F and G/H to the other.
        • Common wiring: Record each sixteen-point group common and its DC source polarity.
        • Strain control: Support the harness so connector weight does not disturb adjacent pins during service.

        Applying Positive or Negative Logic

        • Polarity decision: Determine logic direction from the field-device and source arrangement before wiring.
        • Voltage window: Keep the applied source within 4.75–13.2 VDC.
        • Group consistency: Verify every point in a group follows the same common and logic convention.
        • Change control: Treat a polarity reversal as a design change, not a quick troubleshooting shortcut.

        Using the Selectable Status Indicators

        • Bank selection: Confirm whether the panel is showing the J1 or J2 group before reading LEDs.
        • Point comparison: Exercise one known input to prove the selected bank matches the expected address range.
        • Address mode: Use the upper indicators to check the starting I/O address when mapping is uncertain.
        • Discrepancy: If logic changes without the expected LED, inspect selector position and connector identity first.

        Validating a Sixty-Four-Point Installation

        • Precheck: Review both connector pinouts, four commons, source polarity and module keying.
        • Group sequence: Prove sixteen inputs at a time to keep fault boundaries understandable.
        • Display sequence: Change the bank selector deliberately and record which LEDs were observed.
        • Final record: Reconcile every unused, forced or inverted point before the rack returns to service.
        Description
        General Electric IC655MDL533 is a Series Five 64-point TTL input module for low-level digital signals with selectable positive- or negative-logic operation. Two 37-pin connectors carry the field circuits, which are organized into four groups of sixteen.

        The module is intended for connectorized TTL interfaces rather than conventional line-voltage devices. Logic selection and the external interface reference must agree so that the controller interprets asserted and inactive states in the intended direction.

        A bank selector determines which portion of the large input field is represented by the front indicators. Connector identity, selected display bank and programmed address range therefore work together when tracing a signal from an external TTL source into the Series Five input table.
        Alternative Names
        IC 655 MDL 533 IC655-MDL533 IC655MDL-533 GE IC655MDL533 GE Fanuc IC655MDL533 Series Five IC655MDL533 IC655MD1533 IC655MDLS33
        Technical notes
        Remove power from both connector banks before disconnecting J1 or J2. Preserve cable identity, common polarity and positive/negative-logic wiring, then verify each selected group and address range.
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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 are sixty-four IC655MDL533 inputs divided?
        During IC655MDL533 troubleshooting, the module uses four groups of sixteen circuits, routed through two 37-pin front connectors identified as J1 and J2.
        For a IC655MDL533 installation, how is positive or negative logic selected?
        With IC655MDL533 in service, logic direction is determined by the way the external 5 or 12 VDC source and each group common are wired.
        For IC655MDL533, why are only thirty-two point LEDs provided?
        For an installed IC655MDL533, the selector above J1 chooses which connector bank is represented, allowing one indicator set to display either half of the module.
        On IC655MDL533, what should be checked before exchanging the two field cables?
        Before returning IC655MDL533 to service, mark J1 and J2, record connector orientation, group commons, polarity, address range and all external interposing hardware.
        When working with IC655MDL533, what indicates a possible connector-bank selection error?
        For IC655MDL533, correct controller activity with unexpected front indications can occur when the display selector is showing the opposite thirty-two-point bank.
        During IC655MDL533 troubleshooting, can all four groups share one DC source?
        When checking IC655MDL533, they may use one suitable source or different sources; the chosen positive/negative-logic convention and group commons must remain consistent.
        Before servicing IC655MDL533, how should a 64-point replacement be commissioned?
        On IC655MDL533, test one sixteen-point group at a time, switch the indicator bank as required, and compare every field action with the correct PLC address.

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