Rockwell Automation 74102-443-51 – PLC Communication Module | Allen-Bradley Legacy Controller Platform
Engineering Background
The Rockwell Automation (Allen-Bradley) part number 74102-443-51 is a legacy PLC communication/interface module designed for integration within Allen-Bradley programmable controller systems. As industrial facilities extend the operational life of legacy control architectures, sourcing verified OEM-equivalent spare parts becomes mission-critical. Konmask.com specialises in supplying hard-to-find Rockwell Automation components to maintenance engineers and procurement teams worldwide.
Product Positioning
This module serves as a direct replacement or standby spare for facilities running Allen-Bradley legacy PLC platforms. It is suited for MRO (Maintenance, Repair & Operations) procurement, system upgrades requiring backward-compatible components, and capital spares inventory programs in process-critical environments.
Complete Technical Specifications
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Part Number / SKU | 74102-443-51 |
| Module Type | PLC Communication / Interface Module |
| Platform Compatibility | Allen-Bradley Legacy PLC Series |
| Form Factor | Rack-mount module card |
| Approximate Weight | 200 g |
| Operating Temperature | 0°C to 60°C (typical for Allen-Bradley rack modules) |
| Mounting | Backplane / rack slot installation |
| Power Supply | Supplied via backplane (rack-dependent) |
| Condition Available | New surplus / Refurbished / Used tested |
| Country of Origin | USA |
Note: Confirm exact electrical ratings against your system documentation or contact our technical team for datasheet support.
Proven Application Environments
- Automotive Manufacturing: Body-in-white assembly lines and paint shop conveyors running legacy Allen-Bradley PLC-5 or SLC 500 architectures.
- Oil & Gas Processing: Wellhead control panels and pipeline SCADA systems requiring long-lifecycle spare parts for extended plant operation.
- Water & Wastewater Treatment: Pump station and filtration control systems where controller replacement is deferred pending capital budget approval.
- Food & Beverage Production: Bottling lines, mixing systems, and packaging machinery with legacy Rockwell control infrastructure.
- Power Generation & Utilities: Substation automation and turbine control panels using Allen-Bradley legacy communication modules.
- Pharmaceutical Manufacturing: Validated legacy control systems where change control procedures make controller platform migration costly.
- Pulp & Paper / Mining: Continuous process environments where unplanned downtime from a failed communication module carries significant production loss cost.
Engineering Advantages
- Direct OEM Part Number Match: Sourced and cross-referenced against Rockwell Automation’s original part numbering — no substitution risk.
- Extends Legacy System Life: Enables facilities to defer costly platform migrations while maintaining full system functionality.
- Reduces Downtime Risk: Holding a verified spare eliminates lead-time exposure during unplanned failures in critical production environments.
- Backward Compatible: Designed for drop-in replacement within existing Allen-Bradley rack and backplane configurations.
- Globally Sourced, Locally Supported: Konmask.com maintains sourcing relationships across authorised and certified secondary-market channels.
System Architecture & Signal Flow
In a typical Allen-Bradley legacy PLC architecture, the 74102-443-51 module occupies a dedicated slot in the I/O chassis or processor rack. It interfaces with the backplane bus to facilitate communication between the processor module and peripheral I/O racks, remote adapters, or host computer systems. Signal flow is managed through the backplane data highway, with the module handling protocol translation, data buffering, or channel arbitration depending on its specific functional role within the rack configuration.
Engineers should verify slot addressing, rack configuration switches, and firmware compatibility with the resident processor before installation. Consult the applicable Allen-Bradley system user manual (publication series 1771, 1747, or equivalent) for rack layout and module addressing procedures.
Sourcing & Quality Verification
- All units are inspected upon receipt and prior to dispatch.
- Functional testing performed where test fixtures are available for the specific module type.
- Serialisation and label integrity checked against known OEM markings.
- Anti-counterfeit visual inspection conducted on all Rockwell Automation parts.
- Packaging: ESD-safe anti-static bag with protective outer carton.
- Traceability documentation available upon request for regulated industries.
Procurement Process
- Submit Enquiry: Contact us via email at support@konmask.com or WhatsApp/phone at +0086 19859288691 with your required quantity and delivery timeline.
- Receive Quote: Our team will confirm stock availability, condition grade, lead time, and pricing within 24 business hours.
- Order Confirmation: Purchase order or proforma invoice issued. Payment via T/T bank transfer, PayPal, or other agreed method.
- Quality Check & Dispatch: Module inspected, packed in ESD-safe packaging, and shipped with tracking via DHL, FedEx, or UPS.
- After-Sales Support: Technical support available post-delivery for installation queries.
Technical FAQ
Q: Is the 74102-443-51 a new or refurbished part?
A: We supply both new surplus (unused, original packaging) and refurbished/tested units. Condition is confirmed at time of quotation.
Q: What Allen-Bradley PLC platforms is this module compatible with?
A: This part number is associated with Allen-Bradley legacy controller platforms. Please share your rack model and processor series so our team can confirm compatibility before purchase.
Q: Can you provide a certificate of conformance or test report?
A: Yes. Traceability and inspection documentation can be provided upon request, particularly for regulated industries such as pharmaceutical or nuclear.
Q: What is the lead time?
A: Lead time depends on current stock. In-stock units typically ship within 1–3 business days. Out-of-stock items are sourced within 5–15 business days depending on global availability.
Q: Do you offer a warranty?
A: Yes. We offer a standard 90-day warranty against DOA (dead on arrival) and functional defects. Extended warranty options are available — contact us for details.
Q: Can I return the module if it doesn’t fit my system?
A: We recommend confirming compatibility before purchase. Returns are accepted within 14 days for unused, uninstalled modules in original condition.
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Contact: support@konmask.com | +0086 19859288691
