Allen-Bradley 1492-ACABLE025WB Pre-assembled I/O Cable

The Allen-Bradley 1492-ACABLE025WB serves as the primary 1492-ACABLE025WB Pre-assembled I/O Cable utilized to execute analog signal interconnection across ControlLogix 1756 I/O wiring platforms. The factory-terminated 2.5 m cable assembly links analogue I/O, RTD, and thermocouple input modules to interface terminal systems while maintaining shield continuity for low-level signal transmission.

Suffix Breakdown & Model Matrix

The supplied documentation identifies the model as a fixed catalog assembly without published suffix segmentation. No additional ordering matrix or configurable suffix structure is defined in the provided material.

Hardware Specifications

EtherNet/IP Cabinet Wiring and Signal Integrity

The cable assembly is intended for analog signal routing associated with ControlLogix 1756 analogue input, RTD, and thermocouple modules operating within EtherNet/IP-based automation architectures. Shielded conductor construction assists in limiting coupled electrical noise generated by adjacent AC feeders, relay switching circuits, and VFD output conductors.

Factory-installed terminations maintain fixed pin mapping between controller-side connectors and terminal interfaces, reducing field wiring inconsistencies. Analog signal cables should remain physically separated from high-current power cabling inside the enclosure to minimize induced measurement deviation on low-voltage temperature and process input channels.

Frequently Asked Questions

Q: Can the 1492-ACABLE025WB be shortened or field-spliced?
A: Field modification of the cable assembly can alter shield continuity and conductor mapping. Factory termination integrity should be maintained where possible.

Q: Is the cable intended for thermocouple and RTD applications only?
A: The documented application includes Bulletin 1756 analogue I/O, RTD, and thermocouple input modules. Compatibility depends on the associated terminal interface and module pin assignment.

Q: Does the cable require external grounding?
A: Shield termination practices should follow the grounding method specified for the connected 1756 analog module and enclosure grounding scheme.

Field Installation Guidelines

• Route analog signal cables separately from motor power wiring and switching DC supply conductors.

• Maintain connector retention hardware engagement before energizing the I/O chassis.

• Avoid excessive cable twisting or compression near factory-installed connector backshells.

• Verify shield continuity and insulation condition before commissioning analog measurement loops.

• Use dedicated cable routing channels for low-level RTD and thermocouple circuits inside control cabinets.