1492-ACABLE025WB | Allen-Bradley | 1492 Pre-Wired Shielded Analog Output Cable Assembly

Product Overview

The Allen-Bradley 1492-ACABLE025WB establishes a high-integrity, shielded connection between ControlLogix analog output modules and Analog Interface Modules (AIFM). This specialized pre-wired cable assembly transfers critical 4-20mA current and HART communication signals directly from 1756-OF8 or 1756-OF8H cards to field terminal terminations, streamlining panel integration and safeguarding signal parity.

Technical Specifications

Engineering Advantages

• Suppresses Inductive Crosstalk: The cable utilizes 9 individual twisted-pair conductors to neutralize electromagnetic fields. This configuration preserves the accuracy of 4-20mA control loops and prevents channel-to-channel signal interference inside crowded wire ducts.

• Secures High-Frequency HART Data: Heavy-duty integrated shielding blocks external electrical noise from nearby variable frequency drives (VFDs). This shielding ensures error-free transmission of high-frequency digital HART data superimposed on the current loops.

• Eliminates Terminal Block Miswiring: The assembly features a pre-wired 1756-TBNH connector on one end and a molded 25-pin D-shell connector on the other. This plug-and-play architecture completely bypasses manual point-to-point strip, crimp, and screw connections, eliminating configuration errors during panel building.

• Reduces Insertion Resistance: Premium 22 AWG copper conductors minimize internal loop resistance over the full 2.5-meter distance, maintaining proper voltage headroom for field actuators and positioners.

FAQs

• Does this cable support voltage output configurations on the 1756-OF8 module?

  No. Rockwell Automation builds the 1492-ACABLE025WB specifically to support current (mA) loops and current-based HART communication protocols on the 1756-OF8 and 1756-OF8H modules. Voltage configurations require different cable architectures.

• Do you provide this item in factory-sealed condition?

  Yes. We guarantee this Allen-Bradley 1492-ACABLE025WB arrives as a 100% brand new, original manufacturer product in its pristine factory packaging.

• How do I handle the shield connection during installation?

  The pre-assembled 1756-TBNH and 25-pin D-shell connectors establish the internal grounding paths automatically. Installers must ground the overall cable shield at one end only—typically at the PLC chassis ground bus—to prevent the formation of ground loops that disrupt analog loop readings.