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        • Lifecycle status

          Active / Available from OEM
          For IC655MDL581 availability, bank-level replacement planning, and access to official product documentation, request a coordinated review from Apter Power.

        IC655MDL581

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        1001 reviews ｜ Need a Specific Revision?
        Designed for high-count contact control, General Electric IC655MDL581 is a Relay Output Module for Series Five rack applications.
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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
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        Technical specifications for IC655MDL581

        • Manufacturer:
          General Electric
        • Part Number:
          IC655MDL581
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          Relay Output Module
        • Stock:
          1
        • Output Device:
          Normally open electromechanical relay
        • Number of Circuits:
          32
        • Internal Grouping:
          Four groups of eight circuits
        • DC Operating Range:
          5 to 24 VDC
        • AC Operating Range:
          5 to 250 VAC; 265 VAC peak
        • Maximum Resistive Current:
          5 A per circuit
        • Current per Common:
          5 A maximum
        • Module Current Limit:
          20 A maximum
        • Maximum Leakage Current:
          0.1 mA
        • Minimum Load:
          5 mA at 5 VDC
        • Maximum Inrush Current:
          5 A
        • Operate Response:
          10 ms
        • Release Response:
          10 ms
        • Internal 5 VDC Consumption:
          260 mA typical; 300 mA maximum; 8 mA per energized point
        • External Coil Supply:
          24 VDC ±10%; 350 mA at 26.4 VDC
        • Status Indication:
          Point-level commanded-state indication
        • Terminal Block:
          Removable front terminal block
        • 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 Four-Bank Layout Power Budget Contact Diagnostics Service Planning

        Features:

        • Thirty-two normally open contacts provide high-density relay output capacity.
        • Four eight-channel banks organize commons and field-source distribution.
        • Separate backplane logic and external coil supplies simplify targeted power checks.
        IC655MDL581 combines many relay points in one Series Five slot, but the bank and module current ceilings still govern simultaneous loading. Field drawings should show each common clearly.

        A command-state indicator does not replace a contact test. When a device fails to respond, check the external coil source and the applicable field circuit before changing ladder logic.

        Electromechanical operation provides AC/DC flexibility with a finite switching time and wear mechanism. Inrush, cycling rate, and suppression therefore belong in the service plan.

        Apter Power can prepare a quotation and provide official-document access for the General Electric IC655MDL581 Relay Output Module.
        GE Fanuc IC655MDL581 Relay Output 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.

        Organizing thirty-two relay circuits

        • Output count: Thirty-two contacts occupy four banks of eight.
        • Common limit: Each bank must stay within its own current ceiling.
        • Module total: The sum of all active loads is also limited across the card.
        • Documentation: Mark every common and field source before service.

        Two supplies that must be considered

        • Logic source: Series Five backplane power runs the module electronics.
        • Coil source: External 24 VDC operates the relay coils.
        • Full-load check: Size the external supply for the expected simultaneous outputs.
        • Voltage diagnosis: Measure coil voltage while the relays are commanded on.

        Distinguishing command and contact faults

        • Indicator meaning: Front status reflects the commanded point state.
        • Continuity test: A contact test confirms whether the relay actually changes state.
        • Welded contact: A load that stays on may indicate excessive inrush damage.
        • Chatter: Low coil voltage or unstable commands can cause rapid cycling.

        Preparing a controlled module exchange

        • De-energize: Remove rack and field power before releasing the terminal block.
        • Label banks: Identify all four commons and their associated sources.
        • Inspect hardware: Check connector, terminal, and retention condition.
        • Prove operation: Test representative loads after restoring power.
        Description
        The General Electric IC655MDL581 is a Series Five Relay Output Module with thirty-two normally open dry contacts for high-count AC or DC switching. It concentrates a large number of isolated field-control points in one rack position while retaining separate wiring groups.

        Four banks of eight contacts divide the output structure of IC655MDL581. The 5 A limit at each common and the 20 A ceiling for the entire module both apply, which prevents the individual 5 A contact rating from being treated as a simultaneous rating for all thirty-two channels.

        An external 24 VDC source energizes the relay coils on IC655MDL581, while the rack backplane supplies its logic electronics. Checking both power paths is essential when point indications are present but the field contacts do not operate as expected, particularly after a wiring or module replacement.

        The documented ten-millisecond operate and release times place IC655MDL581 in general sequencing and interlocking work rather than scan-independent high-speed switching. Its removable terminal block and commanded-state indicators support maintenance, but actual continuity still has to be proved at the affected contact and common.
        Alternative Names
        IC655-MDL581 IC655MDL-581 IC 655 MDL 581 GE Fanuc IC655MDL581 General Electric IC655MDL581 GE Fanuc Series Five IC655MDL581 IC655MDL581 Relay Output Module 1C655MDL581
        Technical notes
        When budgeting IC655MDL581, include its 5 VDC backplane demand and the external 24 VDC coil load at the maximum simultaneous relay count.
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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
        Why do all four IC655MDL581 banks stop switching even though logic is running?
        When commissioning IC655MDL581, measure the external 24 VDC coil supply under load and confirm its return path; the PLC backplane can remain active while missing coil power prevents relay operation.
        How should current be totaled for IC655MDL581?
        During an IC655MDL581 replacement review, add the active loads within each eight-point common and then across the entire card; both the 5 A bank limit and 20 A module ceiling must remain satisfied.
        What should be checked when one IC655MDL581 relay chatters?
        At the IC655MDL581 field connection, check external coil voltage, terminal tightness, field-source stability, and command timing; repeated chatter can accelerate contact wear and should not be treated as a normal PLC scan effect.
        Can IC655MDL581 replace a solid-state output card without other changes?
        The practical answer for IC655MDL581 is clear: Not automatically. Confirm the load voltage, current, response requirement, coil-supply wiring, common arrangement, and physical terminal assignment before approving the substitution.
        Why may a field load remain energized after an IC655MDL581 command turns off?
        Within the IC655MDL581 control arrangement, isolate power and test the relay contact for welding, then inspect inrush and suppression on the connected load; the problem may be mechanical contact damage rather than program state.
        What should be recorded before moving an IC655MDL581 terminal block?
        Under normal IC655MDL581 service conditions, document the four commons, field-source polarity or phase, point numbers, and existing protective devices so the bank arrangement is reproduced on the replacement module.
        How can nuisance failures be reduced on frequently cycled IC655MDL581 loads?
        When verifying IC655MDL581, review switching frequency and inrush, add suitable suppression at inductive devices, and distribute current so no bank operates continuously near its common limit.

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