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8261-4155

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GEC Industrial Controls 8261-4155 is a distinct ladder processor assembly for GEM80/141 and GEM80/142 controllers.
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Technical specifications for 8261-4155

  • Manufacturer:
    GEC Industrial Controls
  • Part Number:
    8261-4155
  • Product Family:
    GEM80 Series
  • Product Type:
    GEM80/141/142 Ladder Processor Module
  • Stock:
    1
  • Applicable systems:
    GEM80/141 and GEM80/142
  • Program dependency:
    Site-specific relay-ladder archive
  • Memory relationship:
    Installed companion memory configuration
  • Startup control:
    Project-defined initialization and output state
  • Validation:
    Controlled functional sequence test
  • Weight:
    0.926 lbs (0.42 kg)
  • Estimated shipping dimensions:
    24.5 x 23.5 x 2 cm
  • Tariff Code:
    8537101190
  • Country of origin:
    United Kingdom
  • 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 Applications Programming Standards Installation & Integration

Features:

  • Runs the relay-ladder program in GEM80/141 and GEM80/142 systems.
  • Uses the -4155 processor hardware implementation.
  • Coordinates stored logic with 140-series rack memory and I/O.
This model is kept separate from -4154 because the hardware suffix is a purchasing and compatibility control.

The board supplies the application-processing function for the installed controller sequence.

Revision labels, memory contents and startup state should be documented before the change window begins.

Availability is confirmed against the complete 8261-4155 identity, required condition, quantity and delivery destination at quotation.
Verified resources for GEC Industrial Controls 8261-4155: 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.
  • Operate an established GEM80/141 process-control sequence.
  • Support a legacy GEM80/142 rack that depends on -4155 processor hardware.
  • Prepare a tested spare for a controlled processor-recovery plan.
  • The ladder archive must correspond to the exact plant and rack definition.
  • Retentive values require controlled transfer or reinitialization.
  • Program comparison should be completed before the processor is placed in run.
  • Change control should preserve the approved application revision and test evidence.
  • Panel work must follow the site's isolation and functional-safety procedures.
  • Final records should identify the installed processor and memory revisions.
  • The processor depends on the companion memory, backplane and I/O arrangement.
  • Rack connectors should be inspected before the replacement board is seated.
  • External interfaces must return to their documented operating state after startup.
Description
8261-4155 belongs to the ladder processor group documented for GEM80/141 and GEM80/142 control systems. The -4155 suffix identifies its exact board implementation and must not be collapsed into the neighboring -4154 record. Although it shares the 8261 root with other processors, the board population and revision markings associated with -4155 remain the decisive details for a compatible spare.

Installed in a 140-series controller, the processor interprets the relay-ladder program and coordinates machine decisions with the rack's memory and I/O resources. Program execution is only meaningful when the application revision and physical rack definition agree. The module sustains the controller's established logic cycle, turning input-state changes and stored program decisions into the coordinated output pattern required by the machine or process.

A maintenance team should capture diagnostic indications and produce two verified copies of the program before shutdown. Compare revision markings, memory pairing, edge connectors and startup requirements to the removed -4155 board before attempting a live process restart. Once installed, verify communications with the programming equipment, inspect all processor indications and exercise the application from safe initial conditions before allowing automatic operation.
Alternative Names
8261-4155 8261 4155 82614155 GEC 8261-4155 GEM80 140 Ladder Processor 8261-4155 GEC GEM80/142 Processor -4155 8261-4155 PLC CPU Board
Technical notes
Pair 8261-4155 only with the documented memory arrangement; clear or incompatible memory can alter startup state and leave outputs uncontrolled.
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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.
Why is GEC 8261-4155 listed separately from the -4154 processor?
The suffix marks a distinct hardware implementation whose interchangeability must be proven from the controller documentation.
What startup risk exists after changing an 8261-4155 processor?
Incorrect memory pairing or initialization can prevent the intended application and output states from being restored.
What automation platforms execute through GEC 8261-4155?
It is used as a ladder processor in the GEM80/141 and GEM80/142 controller line.
How are revision details reflected in an 8261-4155 quote?
The offer records available board markings, condition, exact suffix, tested status, quantity and delivery route.
Which acceptance result proves an 8261-4155 replacement is functioning?
The restored program must enter the expected run state and complete the approved I/O and sequence tests.
What should buyers send besides the 8261-4155 model number?
Supply memory-board labels, rack configuration, program checksum, diagnostic photographs, requested quantity and destination.

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