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          Apter Power can assist with IC655CCM590 quotations and official documentation for segment planning, grounding review, and two-ended communication testing.

        IC655CCM590

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        General Electric IC655CCM590 is an RS-422 Adaptor Unit that extends or converts compatible serial links in Series Five communication installations.
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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 IC655CCM590

        • Manufacturer:
          General Electric
        • Part Number:
          IC655CCM590
        • Product Family:
          GE Intelligent Platforms
        • Product Type:
          RS-422 Adaptor Unit
        • Stock:
          1
        • Primary Functions:
          RS-422 isolating repeater and RS-232/RS-422 conversion
        • Communication Medium:
          Asynchronous serial
        • Differential Interface:
          RS-422
        • Single-Ended Interface:
          RS-232
        • Additional RS-422 Distance:
          Up to 4000 ft / 1200 m per documented segment
        • Isolation Purpose:
          Reduce ground-potential interaction between equipment
        • Typical Companion:
          IC655CCM500 CCM Communications Module
        • Configuration Dependencies:
          Common baud, framing, protocol, and station roles
        • Wiring Priorities:
          Pair polarity, shield, termination, and direction
        • Diagnostic Method:
          Prove input and output sides separately
        • 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 Operating Roles Cable Segments Ground Isolation Two-Side Test

        Features:

        • Repeats and electrically isolates a compatible RS-422 communication segment.
        • Converts suitable RS-232 signaling to a differential RS-422 link.
        • Adds another documented long-distance segment when cable rules are maintained.
        IC655CCM590 addresses physical-interface distance and isolation, not application protocol. Both connected devices must still agree on their serial and CCM settings.

        The adaptor is valuable between equipment with different local ground potentials. Correct shield and protective-ground practice remains part of the installation.

        Troubleshooting is clearest when each side is tested independently. Confirm the incoming signal, adaptor power and wiring, then the outgoing differential pair.

        Apter Power supports quotations and official technical-document access for the General Electric IC655CCM590 RS-422 Adaptor Unit.
        GE Fanuc IC655CCM590 RS-422 Adaptor Unit 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.

        Two ways the adaptor can be used

        • RS-422 repeater: Regenerates a compatible differential serial segment.
        • Electrical isolation: Separates communication equipment at differing potentials.
        • RS-232 conversion: Changes a suitable single-ended link to RS-422.
        • Protocol neutrality: Serial settings and message meaning remain the responsibility of endpoints.

        Keeping the extended link electrically valid

        • Polarity: Preserve the positive and negative pair through each section.
        • Termination: Terminate at the true ends of the differential segment.
        • Shielding: Maintain the specified shield and grounding practice.
        • Length: Apply the documented distance to each compliant segment.

        Reducing problems between remote equipment

        • Potential difference: Isolation limits a direct ground path through communications.
        • Protective earth: Cabinet safety grounding remains required.
        • Shield path: Avoid unintentionally bypassing isolation with shield connections.
        • Verification: Measure conditions before and after installing the adaptor.

        Locating a failure around the adaptor

        • Source side: Confirm a correct serial signal enters the unit.
        • Adaptor state: Verify power, wiring, and selected interface direction.
        • Remote side: Check repeated signal polarity and level.
        • Protocol test: Run the complete transaction only after both sides pass.
        Description
        The General Electric IC655CCM590 is an RS-422 Adaptor Unit for compatible Series Five communication links. It can isolate and repeat an RS-422 connection or convert between RS-232 and RS-422 where the installation requires a longer differential segment.

        Repeater operation adds one documented RS-422 cable segment through IC655CCM590; it does not make an arbitrary branch or termination pattern valid. Pair polarity, signal direction, shielding, cable continuity, and the true electrical endpoints still define whether the extended link will communicate.

        Electrical isolation provided by IC655CCM590 is useful when connected equipment does not share the same ground potential. The isolation reduces a direct ground path, but baud, parity, framing, protocol, and station roles must still be common to the communicating devices.

        Commissioning IC655CCM590 is most conclusive when the adaptor is treated as two test boundaries. Verifying the local input first and then the repeated or converted output identifies which side loses the signal before a complete CCM transaction is attempted.
        Alternative Names
        IC655-CCM590 IC655CCM-590 IC 655 CCM 590 GE Fanuc IC655CCM590 General Electric IC655CCM590 GE Fanuc Series Five IC655CCM590 IC655CCM590 RS-422 Adaptor Unit 1C655CCM590
        Technical notes
        For IC655CCM590 service, label both serial sides and record interface type, polarity, shield, termination, baud, and connected station roles.
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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 does adding IC655CCM590 not fix a CCM protocol error?
        Before servicing IC655CCM590, the adaptor changes or repeats the electrical interface; baud, parity, message structure, station identity, and application logic still have to match.
        What should be checked when the IC655CCM590 output side is silent?
        While evaluating IC655CCM590, verify the incoming serial signal, adaptor power and wiring, interface direction, differential-pair polarity, and whether the source is using the expected connector.
        Can IC655CCM590 extend any RS-422 topology by 4000 ft?
        The practical answer for IC655CCM590 is clear: No. The added distance applies to a compliant segment; termination, cable type, endpoints, and topology must still follow the documented design.
        When is the isolation function of IC655CCM590 most useful?
        With IC655CCM590 in operation, it helps when connected equipment has different ground potentials or when a direct path would create troublesome common-mode conditions.
        With IC655CCM590, why can communication work at low speed but fail after baud is increased?
        As part of an IC655CCM590 check, higher rates are less tolerant of cable length, reflections, poor termination, and noise, so reassess the complete physical link at the new speed.
        What should be labeled before replacing IC655CCM590?
        When IC655CCM590 behavior is being assessed, mark the input and output sides, RS-232 or RS-422 role, pair polarity, shield, termination, and the stations attached to both cable segments.
        With IC655CCM590, how can a repeater fault be distinguished from a remote-device fault?
        During maintenance of IC655CCM590, use a known local test to confirm data entering the adaptor and measure or monitor the repeated signal before reconnecting the remote device.

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