Allen-Bradley 1492-CABLE025Z Bulletin 1492 Pre-Wired I/O Interface Cable

Product Overview

The Allen-Bradley 1492-CABLE025Z functions as a high-density, factory-tested pre-wired cable assembly within the Bulletin 1492 digital wiring ecosystem. This 2.5-meter (8.2 feet) interconnect cable establishes an immediate point-to-point link between standard ControlLogix 1756 32-point Input/Output (I/O) modules and compatible 40-pin Interface Modules (IFMs). By replacing manual terminal strip wiring, this heavy-duty cable streamlines the integration of digital field signals into central Allen-Bradley programmable automation controllers.

We supply this component strictly as a 100% brand new, original factory-sealed assembly to guarantee complete conductor insulation integrity, perfect factory crimps, and immediate deployment readiness for critical industrial automation upgrades.

Technical Specifications

The table below maps out the physical, electrical, and structural characteristics of the pre-wired cable assembly:

Engineering Advantages

• Eliminates Manual Point-to-Point Pin Crimping: The 1492-CABLE025Z eliminates the tedious process of measuring, stripping, crimping, and labeling 40 individual wires per I/O card. Technicians simply snap the integrated 1756-TBCH connector onto the ControlLogix module and plug the 40-pin end into the IFM block, cutting panel wiring times by up to 75%.

• Suppresses Cross-Talk and Signal Attenuation: The premium #22 AWG stranded copper conductors minimize internal voltage drop over the 2.5-meter span. The precise, industrial-grade bundle shielding resists environmental electromagnetic interference (EMI) originating from adjacent variable frequency drives (VFDs) and high-power contactors, protecting low-voltage digital signals from data corruption.

• Solves Tight Cabinet Depth Constraints: High-density 32-point cards require extremely neat wire routing to fit within shallow enclosure doors. This factory-molded cable trunk exits cleanly from the bottom of the 1756-TBCH housing, establishing a uniform bend radius that prevents wire stress and allows smooth closing of standard 10.7-inch deep marshalling cabinets.

FAQs

• Can I utilize this 1492-CABLE025Z cable to link 1756 analog I/O modules?

  No. This cable uses a specific 40-conductor pinning array meant for 32-point digital I/O cards. Analog modules require specialized, individually shielded twisted-pair cables (such as the 1492-CABLE_X series) to isolate sensitive millivolt and milliamp signals from high-frequency noise. Using this digital cable on analog signals risks severe cross-channel noise induction.

• What precautions should installation teams take regarding the cable bend radius inside the wire duct?

  To safeguard the internal #22 AWG stranded copper cores from physical fatigue or stretching, maintain a minimum dynamic bend radius of at least 3 times the total outer cable diameter during routing. Secure the trunk with wide velcro straps rather than tight zip-ties to avoid crushing the outer insulation layer.

• Does this pre-wired assembly replace the need for the standard 1756-TBNH or 1756-TBSH connectors?

  Yes. The 1492-CABLE025Z includes a molded 1756-TBCH connector directly on the module side. This connector replicates the physical form factor of the standard removable terminal block (RTB), allowing you to slide it straight onto any 32-point ControlLogix housing without buying extra loose termination hardware.