Allen-Bradley 1492-CABLE Series Pre-Wired Interface Cables — 1492-CABLE025TBCH

Technical Dossier

Product Details And Specifications

Allen-Bradley 1492-CABLE Series: Comprehensive Module Range and Technical Overview

The Allen-Bradley 1492-CABLE series, manufactured by Rockwell Automation, is a standardized range of pre-wired interface cables designed to terminate field wiring directly to Allen-Bradley 1746 SLC 500, 1756 ControlLogix, and 1769 CompactLogix digital I/O modules. These cables eliminate the need for field-side terminal block wiring, reducing installation time and wiring errors in high-density I/O environments. The series is deployed globally across chemical processing plants, petroleum refineries, nuclear power generation facilities, automotive assembly lines, and water treatment infrastructure — anywhere that structured, auditable I/O wiring is a plant engineering requirement. The 1492-CABLE range interfaces directly with Allen-Bradley 1492-IFM (Interface Modules) and 1492-AIFM (Analog Interface Modules), forming a complete field-to-controller wiring system that is documented in Rockwell Automation Wiring System catalog literature.

The Evolution of 1492-CABLE Architecture

The 1492-CABLE series was introduced alongside the expansion of the 1746 SLC 500 platform in the early 1990s, when Rockwell Automation standardized the IFM (Interface Module) wiring concept to address field wiring density and reliability requirements in process industries. Early variants used 0.25 m and 0.5 m cable lengths with standard D-shell or ribbon connectors terminating to 1492-IFM modules mounted on DIN rail adjacent to the I/O rack.

As the 1756 ControlLogix platform became the dominant architecture for large-scale DCS and hybrid control systems through the 2000s, the 1492-CABLE series expanded to support higher-density 32-point and 64-point digital I/O modules, requiring multi-conductor shielded cable assemblies with keyed connectors to prevent mis-mating. The introduction of the 1769 CompactLogix platform added a third connector family to the series, with shorter cable lengths (0.25 m, 0.5 m, 1.0 m) suited to compact panel installations.

By the 2010s, the 1492-CABLE series entered a mature/stable lifecycle phase. While Rockwell Automation continues to supply current production variants, many early SLC 500-specific cable assemblies have been discontinued. Plants operating legacy 1746 I/O racks must source these cables through authorized distributors or specialist spare parts suppliers. The series is not expected to undergo further architectural revision; migration paths lead to 1756-IB16/OB16 modules with 1492-AIFM analog interface modules or direct Ethernet/IP I/O architectures.

1492-CABLE Full Catalog & Functionalities (SKU List)

The following SKUs represent the primary catalog of the Allen-Bradley 1492-CABLE series, organized by target platform and cable length. Each entry reflects a verified, commercially available or historically stocked part number.

1756 ControlLogix Platform — Digital I/O Interface Cables

• 1492-CABLE025TBCH: 0.25 m pre-wired cable, 1756 digital I/O to 1492-IFM, standard conductor, right-angle connector
• 1492-CABLE050TBCH: 0.5 m pre-wired cable, 1756 digital I/O to 1492-IFM, standard conductor, right-angle connector
• 1492-CABLE100TBCH: 1.0 m pre-wired cable, 1756 digital I/O to 1492-IFM, standard conductor, right-angle connector
• 1492-CABLE150TBCH: 1.5 m pre-wired cable, 1756 digital I/O to 1492-IFM, extended reach panel wiring
• 1492-CABLE200TBCH: 2.0 m pre-wired cable, 1756 digital I/O to 1492-IFM, long-run panel installation
• 1492-CABLE025TANH: 0.25 m cable, 1756 analog I/O to 1492-AIFM, shielded, straight connector
• 1492-CABLE050TANH: 0.5 m cable, 1756 analog I/O to 1492-AIFM, shielded, straight connector
• 1492-CABLE100TANH: 1.0 m cable, 1756 analog I/O to 1492-AIFM, shielded, straight connector

1746 SLC 500 Platform — Digital I/O Interface Cables

• 1492-CABLE025D: 0.25 m cable, 1746 SLC 500 digital I/O to 1492-IFM, D-shell termination
• 1492-CABLE050D: 0.5 m cable, 1746 SLC 500 digital I/O to 1492-IFM, D-shell termination
• 1492-CABLE100D: 1.0 m cable, 1746 SLC 500 digital I/O to 1492-IFM, D-shell termination
• 1492-CABLE025Z: 0.25 m cable, 1746 SLC 500 32-point I/O module, dual-connector assembly
• 1492-CABLE050Z: 0.5 m cable, 1746 SLC 500 32-point I/O module, dual-connector assembly

1769 CompactLogix Platform — Digital I/O Interface Cables

• 1492-CABLE025TBCH-L: 0.25 m cable, 1769 CompactLogix digital I/O to 1492-IFM, compact panel format
• 1492-CABLE050TBCH-L: 0.5 m cable, 1769 CompactLogix digital I/O to 1492-IFM, compact panel format
• 1492-CABLE100TBCH-L: 1.0 m cable, 1769 CompactLogix digital I/O to 1492-IFM, compact panel format

Sourcing Hard-to-Find & Obsolete 1492-CABLE Parts

DriveKNMS maintains a dedicated inventory of Allen-Bradley 1492-CABLE series cables, including discontinued variants originally specified for 1746 SLC 500 platforms. As Rockwell Automation has progressively reduced catalog availability for legacy SLC 500 accessories, plants operating these systems face increasing lead times through standard distribution channels.

DriveKNMS sources 1492-CABLE assemblies through a network of authorized surplus and MRO (Maintenance, Repair & Operations) suppliers, enabling same-week dispatch for many common lengths. For obsolete variants such as 1492-CABLE025D and 1492-CABLE025Z, DriveKNMS provides cross-reference verification against the original Rockwell Automation catalog to confirm connector compatibility before shipment. Customers operating mixed-platform environments (SLC 500 + ControlLogix) can submit consolidated part lists for batch sourcing.

Lifecycle extension support includes: verified surplus stock with full traceability documentation, cross-reference to current-production equivalent cables where applicable, and technical consultation on IFM module compatibility for replacement cable assemblies.

Quality Control for the 1492-CABLE Range

Each 1492-CABLE assembly processed by DriveKNMS undergoes a structured inspection and functional verification protocol prior to dispatch:

• Connector shell inspection: keying, locking tab integrity, and pin seating verified against Rockwell Automation connector specification drawings
• Conductor continuity test: each conductor verified end-to-end using calibrated continuity test equipment; open circuits and cross-wiring faults are rejection criteria
• Shield continuity verification: for shielded analog variants (TANH suffix), shield drain wire continuity and isolation from signal conductors is confirmed
• Connector mating test: cables are mated to reference 1492-IFM or 1492-AIFM modules to verify mechanical fit and locking engagement
• Visual inspection: cable jacket, strain relief, and labeling reviewed for damage, re-termination evidence, or non-OEM modification

Test records are retained per shipment and available upon request for quality-critical installations in regulated industries (nuclear, pharmaceutical, oil & gas).