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IC655CPU500

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General Electric IC655CPU500 Series Five CPU module for program execution, rack I/O coordination, Logicmaster 5 programming and controller communications.
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Technical specifications for IC655CPU500

  • Manufacturer:
    General Electric
  • Part Number:
    IC655CPU500
  • Product Family:
    GE Intelligent Platforms
  • Product Type:
    Series Five CPU Module
  • Stock:
    1
  • Product family:
    Series Five PLC
  • Module role:
    Central processing unit
  • Required position:
    CPU base unit, adjacent to power supply
  • Programming environment:
    Logicmaster 5
  • Operating modes:
    RUN / OIU / STOP
  • Communication interfaces:
    15-pin RS-232; 25-pin RS-232/RS-422
  • Status indicators:
    PWR, RUN, CPU, DIAG, BATT, MEM, I/O, COMM
  • CPU current requirement:
    1500 mA
  • Estimated shipping dimensions:
    3.8 × 25.4 × 12.7 cm
  • Tariff Code:
    8537101190
  • 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 Rack Family Fit Serial Channels Keypad Operation CPU Fault Review

Features:

  • Basic one-word ladder functions execute in 0.5 microseconds.
  • A battery-backed real-time clock and calendar are accessible to the user program.
  • Removable memory cartridges retain user logic and I/O configuration for transfer or storage.
The three-position keyswitch lets maintenance personnel place the processor in RUN, enter OIU operation for monitored access, or halt scanning and disable outputs in STOP.

Operator-interface functions expose I/O states, accumulated timer and counter values, data registers, password access, and program-controlled messages without changing the physical rack arrangement.

Communication behavior is governed from the front of the module, where address, signaling mode, and supported data rate can be selected for the lower host port.

Apter Power can check current pricing and sourcing availability for the General Electric IC655CPU500 Series Five CPU Module used in maintained Series Five systems.
General Electric IC655CPU500 Series Five CPU 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.

IC655CPU500 Base-Unit Integration

  • CPU position: IC655CPU500 occupies the processor position immediately beside the power supply in a Series Five CPU base unit.
  • Rack choices: The processor can operate in a six-I/O-slot IC655CHS506 base or an eight-I/O-slot IC655CHS508 base.
  • Power budget: Its 1500 mA internal demand must be included before selecting the remaining modules for the base-unit load.
  • Program storage: Compatible RAM, EPROM, or EEPROM memory cartridges provide the removable program-storage medium used by the processor.

Two Connectors, One IC655CPU500 Port

  • Operator interface: The upper 15-pin RS-232 connector serves the Series Five OIU and receives access priority when both connectors are active.
  • Programming path: Logicmaster 5 equipment connects through the lower 25-pin interface, which supports both RS-232 and RS-422 signaling.
  • Network role: The built-in CCM2-compatible slave port allows a host computer or Series Six Plus PLC to supervise Series Five data exchange.
  • Port setup: Four front switches choose RS-232 or RS-422 operation, the CCM address behavior, and a supported transfer rate from 300 to 19,200 bps.

Using IC655CPU500 Without Rewiring the Rack

  • RUN selection: Normal scanning continues with field outputs enabled while the keyswitch remains in the RUN position.
  • OIU selection: Operators can observe I/O points, timer and counter accumulations, and data registers through the dedicated interface mode.
  • Protected access: The OIU functions permit login and logout when a password has been assigned to the control system.
  • Message display: Text prepared in Logicmaster 5 can be presented on the two-line Series Five operator-interface display under program control.

Reading the IC655CPU500 Front Indicators

  • Processor health: The red CPU indicator distinguishes a processor malfunction or watchdog timeout from normal execution.
  • Scan-stopping fault: DIAG illuminates when an internal condition such as program parity or a fatal I/O fault halts scanning.
  • Stored-program warning: BATT reports a weak backup source, while MEM identifies an error in program memory.
  • External paths: Separate I/O and COMM indicators direct troubleshooting toward field exchange or the active communication route.
Description
General Electric IC655CPU500 is the central processor module for a Series Five PLC, executing the stored control program and coordinating the I/O assigned across the CPU and expansion bases. It works with Logicmaster 5 programming and provides the operating controls required at the rack.

The processor includes a battery-backed real-time clock and supports removable memory cartridges for retaining or transferring user logic and configuration. Its scan performance, program storage and I/O capacity define the scale of the control task that can be handled by the installed CPU arrangement.

Front controls distinguish RUN, operator-interface access and STOP behavior, while the local display and communication connections support observation of controller data and operating status. These facilities allow program execution, operator access and external communication to be evaluated separately when a Series Five system is not responding as expected.
Revisions

Revision Part #

Also known as

IC655CPU500L
IC655CPU500-L, Series L, Rev L
IC655CPU500K
IC655CPU500-K, Series K, Rev K
IC655CPU500J
IC655CPU500-J, Series J, Rev J
IC655CPU500H
IC655CPU500-H, Series H, Rev H
IC655CPU500G
IC655CPU500-G, Series G, Rev G
IC655CPU500F
IC655CPU500-F, Series F, Rev F
IC655CPU500E
IC655CPU500-E, Series E, Rev E
IC655CPU500D
IC655CPU500-D, Series D, Rev D
Alternative Names
IC 655 CPU 500 IC-655-CPU-500 GE IC655CPU500 GE Fanuc IC655CPU500 Series Five IC655CPU500 IC655CPU5OO 1C655CPU500 IC655 CPU500
Technical notes
IC655CPU500 communication ports are not isolated from the backplane; equipment on different ground potentials requires an appropriate isolating repeater.
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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.
How should IC655CPU500 be positioned in a Series Five CPU base unit?
Install IC655CPU500 immediately beside the power supply, seat it directly in the backplane, and secure both captive screws.
What should be checked when the PWR indicator on IC655CPU500 remains off?
Check the incoming supply and the backplane +5 VDC level for IC655CPU500; the indicator stays off when power is missing or outside tolerance.
Why can connecting an operator interface interrupt host communication through IC655CPU500?
Both IC655CPU500 connectors share one logical port, and activity switches to the 15-pin operator-interface connection when both are accessed.
Which IC655CPU500 connection should be used for Logicmaster 5 programming?
Use the lower 25-pin IC655CPU500 connector, which carries RS-232 and RS-422 signals for programming and general communication.
How is the communication speed changed on IC655CPU500?
Set switches 3 and 4 below the IC655CPU500 communication port to the required supported baud-rate combination.
What does a red DIAG indication mean on IC655CPU500?
A red DIAG indicator means IC655CPU500 detected an internal fault serious enough to halt the processor scan, such as a program-parity or fatal I/O fault.
What happens to controlled outputs when IC655CPU500 is placed in STOP?
Selecting STOP on IC655CPU500 halts the normal processor scan and disables the outputs, so connected machinery no longer follows the running control program.

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