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8172-4003

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GEC Industrial Controls 8172-4003 is a Basic I/O Interface module for GEM80/141 and GEM80/142 programmable controllers.
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Technical specifications for 8172-4003

  • Manufacturer:
    GEC Industrial Controls
  • Part Number:
    8172-4003
  • Product Family:
    GEM80 Series
  • Product Type:
    GEM80/141/142 Basic I/O Interface Module
  • Stock:
    1
  • Controller families:
    GEM80/141 and GEM80/142
  • Data role:
    Controller-to-I/O interface
  • Installation:
    GEM80 system rack
  • Matching requirement:
    Exact 8172-4003 assembly
  • Weight:
    0.617 lbs (0.28 kg)
  • Estimated shipping dimensions:
    2 x 24.5 x 23.5 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 Integration Interoperability Communication & Connectivity

Features:

  • Provides the Basic I/O Interface for GEM80/141 and GEM80/142.
  • Carries the controller-to-I/O data path in the supported rack arrangement.
  • Uses the exact 8172-4003 assembly configuration.
The 8172-4003 identity comes from the original GEC GEM80 140-series hardware literature.

It links the controller architecture with the Basic I/O structure used by the installed system.

Record slot and connector relationships before service because the interface affects more than one I/O module.

Availability is confirmed against the complete 8172-4003 identity, required condition, quantity and delivery destination at quotation.
Verified resources for GEC Industrial Controls 8172-4003: 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.
  • Connect Basic I/O hardware to a GEM80/141 programmable controller.
  • Maintain the I/O data path of a GEM80/142 legacy automation rack.
  • Restore a failed 140-series interface during planned plant maintenance.
  • The module fits the Basic I/O position documented for the 140-series rack.
  • Processor and I/O connectors must follow the original rack layout.
  • Adjacent module order should remain unchanged during interface replacement.
  • Use is documented with GEM80/141 and GEM80/142 controllers.
  • The connected I/O structure must be the supported Basic I/O arrangement.
  • Later GEM80 families require an explicit interface mapping rather than an assumed fit.
  • The board carries the parallel system I/O data path through its rack connectors.
  • Cable orientation and retention determine reliable communication with connected I/O.
  • Inspect contact condition before attributing intermittent data loss to logic hardware.
Description
8172-4003 is the Basic I/O Interface identified in the original GEM80/141 and GEM80/142 documentation. It provides the controller-side connection that enables the supported local I/O arrangement to exchange data with the processor. The board acts as an architectural bridge rather than a source of field points, so its identity is determined by how it connects the processor environment to the local I/O structure.

Within a GEM80 rack, the interface organizes the I/O data path expected by the 140-series controller architecture. Its operating role depends on the rack slot, ribbon or backplane connections and the sequence defined by the original system build. It supports continued operation of 140-series control panels whose sequencing and interlocks depend on timely exchange between the CPU and the installed rack modules.

Service work should record every connector, rack designation and adjacent module before removal. The 8172-4003 suffix must match because other 8172 assemblies may share a family number without implementing the same interface configuration. Following replacement, the rack should be powered through the approved sequence and observed for interface indications, I/O recognition and stable scan behavior before field outputs are enabled.
Alternative Names
8172-4003 8172 4003 81724003 GEC 8172-4003 GEC GEM80 Basic I/O Interface GEM80/141 I/O Interface 8172-4003 GEM80/142 Basic I/O Module
Technical notes
Preserve connector orientation and rack order when replacing 8172-4003; a reversed or offset I/O connection can disable or misaddress multiple field modules.
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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.
Which GEM80 controllers use GEC 8172-4003 as a Basic I/O Interface?
Original GEC documentation assigns it to the GEM80/141 and GEM80/142 controller families.
What system-wide effect can an 8172-4003 interface fault produce?
Because it carries the Basic I/O data path, multiple connected modules can become unavailable or miscommunicate.
Where is GEC 8172-4003 installed in a GEM80 system?
It occupies the designated interface position in the 140-series controller and I/O rack arrangement.
How is an 8172-4003 legacy spare checked for sale?
Apter Power verifies the exact suffix, connector integrity, board condition and available quantity before quoting.
Why is another 8172 suffix not automatically interchangeable with GEC 8172-4003?
Suffix changes can indicate different connector populations, revisions or interface assignments within the product family.
What rack evidence should be supplied for an 8172-4003 inquiry?
Send the controller type, rack layout, cable photographs, board labels, fault symptoms, quantity and delivery location.

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