Product Overview

The Foxboro RH928AW I/A Series 200 Type 5 LSZH Termination Cable is a cable assembly associated with Foxboro I/A Series 200 industrial control system installations. It forms part of the physical wiring infrastructure used to connect designated system interfaces and maintain the intended electrical signal path within a configured control system.

In distributed control system (DCS) installations, termination cables connect equipment across different parts of the control architecture. Correct cable selection helps preserve the intended connection arrangement during initial installation, system maintenance, and cabinet refurbishment. The RH928AW is identified as a Type 5 LSZH termination cable, making both its cable classification and material designation relevant when selecting a replacement for an existing installation.

LSZH stands for Low Smoke Zero Halogen. This type of cable construction is relevant to industrial facilities where reducing smoke generation and halogen-containing emissions during a fire is an important consideration. It may be specified in process plants, equipment rooms, and control cabinets according to the facility’s wiring requirements and applicable installation standards.

For maintenance personnel working with established Foxboro infrastructure, identifying the correct cable is essential. A replacement should match the specified model and connection arrangement rather than being selected solely because another cable belongs to the same product family. Connector configuration, endpoint assignment, and the intended system application should be confirmed before installation or substitution.

The RH928AW is a passive connection component rather than an active control device. Its contribution to the overall system depends on maintaining the physical connection required by the installed architecture, with appropriate routing, identification, and connector handling throughout the cable’s service life.

Technical Specifications

Product Features

• I/A Series 200 system association: The RH928AW belongs to the termination cable category associated with Foxboro I/A Series 200 installations. Its application should match the actual system configuration and the connection points specified for the installation.
• Type 5 cable identification: The Type 5 designation distinguishes this cable configuration from other termination cable variants. This distinction is useful when several cable types are installed in the same cabinet or maintained in the same spare-parts inventory.
• LSZH cable construction: Low Smoke Zero Halogen materials are intended to limit smoke generation and avoid halogen-containing compounds in the cable materials. The specific fire performance of an individual cable depends on its tested construction and applicable standards.
• Defined electrical interconnection: The cable provides a physical conductive path between compatible interfaces. It does not independently execute control logic, convert process measurements, or replace the functions of an I/O module.
• Support for organized cabinet wiring: Correct identification and routing help technicians maintain a traceable wiring layout, particularly in control cabinets containing multiple modules, termination assemblies, and cable connections.
• Useful for planned replacement work: The RH928AW model number gives maintenance personnel a specific reference for checking installed equipment, spare-parts records, and replacement requirements.
• Configuration-specific application: Using the specified model helps avoid substitutions based only on visual similarity or a shared product family. The connector arrangement and intended endpoints still need to match the installation.
• Maintenance-friendly identification: Clear labels at both cable ends make it easier to trace the connection during inspection, troubleshooting, and subsequent replacement.
• Compatibility with established wiring practices: The cable can be routed according to the cabinet’s cable-management, separation, and labeling arrangements, subject to the requirements of the particular system.
• Support for connection integrity: Proper connector seating, cable handling, and routing help reduce the risk of connection interruptions caused by installation errors or mechanical strain.

Working Principle

The Foxboro RH928AW functions as a passive electrical connection within a compatible I/A Series 200 control system arrangement. When connected between its designated endpoints, it provides the conductive path required for the connected equipment to exchange the electrical signals supported by that interface.

The cable itself does not interpret process measurements or make control decisions. Those functions belong to the relevant controllers, I/O modules, and other active system equipment. The RH928AW supports the physical connection between the appropriate interfaces, allowing signals to pass through the wiring arrangement specified for the installation.

A typical connection path can be represented as:

Designated system interface → RH928AW termination cable → Compatible termination or equipment interface

The actual connection arrangement depends on the system design. The cable may form part of an internal cabinet interconnection or another designated connection between compatible system interfaces. The exact endpoints must be identified from the installed configuration and relevant documentation rather than assumed from the general product description.

During normal operation, the cable remains largely passive. Its electrical continuity and connector condition help maintain the intended signal path. Incorrect endpoint assignment, a loose connection, damaged conductors, or an unsuitable replacement can interrupt that path and cause signal-related symptoms in the connected equipment.

When investigating a suspected cable fault, technicians should distinguish a physical connection problem from a fault in the associated module or interface. Inspecting the cable, checking connector seating, confirming endpoint identification, and performing approved continuity checks can help narrow down the cause before other system components are replaced.

Role in an I/A Series 200 Control Architecture

Within a Foxboro I/A Series 200 control architecture, termination cables form part of the physical interconnection layer. They connect designated interfaces and support the wiring structure through which system signals travel. The RH928AW belongs to this connection layer when the installed configuration specifies the corresponding Type 5 LSZH cable.

The cable does not replace an I/O module, termination assembly, controller, or communication interface. Instead, it works alongside those components by maintaining the required electrical connection between them. Correct cable selection is therefore relevant during commissioning, maintenance, system refurbishment, and replacement of existing wiring.

Industrial Applications

Installation and Maintenance

1. Confirm the model and application. Before installation, check that RH928AW is the cable identified in the system documentation, equipment records, or approved replacement-parts list. Do not select it solely because it belongs to the I/A Series 200 cable family.
2. Identify both connection endpoints. Establish where the cable begins and ends before disconnecting an existing cable. Record the relevant cabinet, module, connector, or interface identifiers so that the original wiring arrangement can be restored correctly.
3. Apply the required isolation procedure. Follow the site’s electrical safety rules and approved maintenance procedure before disconnecting control system wiring. Determine whether the affected equipment must be taken out of service and ensure that the work will not create an unintended process or control-system interruption.
4. Inspect the replacement cable. Examine accessible portions of the cable and its connector areas for cuts, crushing, deformation, contamination, or other visible damage. Do not install a cable with defects that could affect its electrical or mechanical condition.
5. Verify connector compatibility. Compare the cable connectors with the designated interfaces and confirm that the connection arrangement matches the installed configuration. Do not force a connector into place or assume that visually similar connectors have the same electrical assignment.
6. Preserve cable identification. Retain existing labels when they remain accurate, or apply clear identification that corresponds to the current wiring records. Labeling both ends helps technicians trace the cable during subsequent inspection and troubleshooting.
7. Route the cable carefully. Follow the established cabinet wiring path where practical. Keep the cable away from sharp edges, moving mechanisms, hot surfaces, and other conditions that could damage the jacket or compromise the connection.
8. Avoid excessive bending and pulling. Handle the cable without placing unnecessary tension on the conductors or connectors. Observe the applicable bend-radius requirements and avoid tight loops, kinks, or routing that places continuous strain on the connection points.
9. Maintain suitable cable separation. Follow the cabinet’s wiring design and applicable installation practices for separating signal or control wiring from power cables and other potential sources of electrical interference. The required separation depends on the system design and cable application.
10. Secure the cable without crushing it. Use suitable cable-management accessories to keep the cable in position. Ties, clips, and supports should prevent uncontrolled movement without compressing the jacket or putting stress on the connector ends.
11. Verify the completed connection. Check that both endpoints are correctly connected and that the cable follows the intended route. Where the approved maintenance procedure permits, perform the appropriate continuity or connection checks and confirm the associated system signal path after restoration.
12. Document the maintenance activity. Record the installed model, the connection points affected, and any defects or corrective actions. Update the cabinet wiring records or maintenance log when the work changes the documented cable arrangement.

Troubleshooting considerations: If a signal or connection problem appears after installation, first verify the cable identification, endpoint assignment, connector seating, and physical condition. Check whether the fault remains after the connection has been inspected according to the approved maintenance procedure. Do not assume the cable is defective until the connected interfaces and the wider signal path have also been considered.

Related Components

Recommended Related Models

Key Advantages

• Specific model identification: RH928AW gives maintenance teams a clear part-number reference for checking replacement requirements.
• LSZH material designation: Supports cable-selection decisions in facilities that specify low-smoke, zero-halogen cable construction.
• Established system association: Identifies the cable with the Foxboro I/A Series 200 product family.
• Support for wiring maintenance: Can be included in planned replacement, cabinet inspection, and control system refurbishment tasks where specified.
• Clear distinction between cable variants: The Type 5 LSZH designation helps separate this cable from other termination cable configurations.
• Improved traceability: Model and endpoint labeling can make future inspections, fault tracing, and replacement work easier to manage.

Technical FAQs

1. What is the Foxboro RH928AW I/A Series 200 Type 5 LSZH Termination Cable used for?

The RH928AW is a termination cable associated with Foxboro I/A Series 200 control system installations. It provides a physical electrical connection between designated interfaces when the installed configuration specifies this cable type. It does not independently process signals or execute control logic.

2. What does Type 5 LSZH mean for the RH928AW?

Type 5 identifies the cable classification stated in the product name, while LSZH means Low Smoke Zero Halogen. The LSZH designation describes cable material characteristics intended to limit smoke and avoid halogen-containing compounds in the cable materials. It does not, by itself, establish a particular fire rating or suitability for every installation environment.

3. Is the RH928AW interchangeable with the Foxboro P0928AW?

The two model designations are associated with the stated I/A Series 200 Type 5 LSZH termination cable category, but that alone does not establish complete interchangeability. Before substituting one for the other, verify the exact part number, connector arrangement, endpoint assignment, and applicable system documentation.

4. What should be checked before replacing an RH928AW cable?

Confirm the specified model and connection points, inspect the replacement cable and connectors, and follow the site’s isolation and wiring procedures. After installation, verify correct endpoint assignment, connector seating, cable routing, and the associated signal path according to the approved maintenance procedure.