Product Overview

The Foxboro RH916ND is a module fieldbus cable for compatible Foxboro I/A Series distributed control systems. It is the updated reference associated with the legacy P0916ND cable and is specified for a 2 Mbps base-to-base communication connection. With a cable length of 0.25 meters, it is suited to installations where compatible modular baseplates are mounted close together. <Cite refs={[“turn676717search1″,”turn676717search0”]}/>

In a control cabinet, baseplates provide the physical mounting and electrical interfaces for fieldbus modules. The RH916ND connects the designated fieldbus interfaces, allowing the connected system hardware to exchange signals through the established communication path. Its short cable length helps keep adjacent-baseplate connections organized and limits excess slack around other wiring.

The RH916ND belongs to a family of module fieldbus cables available in different lengths and construction variants. The correct selection depends on the baseplate type, required communication connection, cable routing, and applicable system requirements. The RH916ND should not be confused with termination cables that connect fieldbus modules to remote termination assemblies, because these cable types serve different purposes.

For maintenance teams, the cable is a passive connection component. It does not process control logic, regenerate communication signals, or independently configure the fieldbus. Its role is to preserve the required electrical path between compatible baseplate interfaces.

Technical Specifications

Product Features

• 2 Mbps fieldbus connection: Supports the specified communication link between compatible baseplates.
• Compact cable length: Accommodates closely positioned interfaces in control cabinets.
• Shielded twisted-pair construction: Supports the intended signal connection in industrial control environments.
• Updated part reference: RH916ND is associated with the earlier P0916ND cable reference.
• Passive signal transmission: Carries electrical signals without active processing or regeneration.
• Multiple length options in the cable family: Allows selection based on the actual spacing between compatible connection points.

Working Principle

The RH916ND provides a conductive path for module fieldbus signals between compatible baseplates. When the connected system exchanges data, the cable carries the electrical signals between the two fieldbus interfaces.

Baseplate A → RH916ND Module Fieldbus Cable → Baseplate B

On applicable legacy modular baseplates, the two module fieldbus connectors are internally connected in parallel, allowing either connector to be used for an appropriate base-to-base connection. The actual connection arrangement must follow the installed system’s wiring requirements.

The cable does not interpret messages or determine communication timing. Its performance depends on the connected hardware, the cable’s electrical condition, correct connector engagement, and the fieldbus topology. A damaged conductor or loose connection can interrupt communication even if the connected modules remain functional.

During troubleshooting, inspect the cable and connectors before replacing active hardware. Confirm that the cable reference matches the installed baseplate family and that any required bus termination components are fitted in accordance with the system design.

Role in the Foxboro I/A Series Fieldbus Architecture

The RH916ND provides the physical communication path between compatible modular baseplates. The fieldbus interfaces and connected modules handle data exchange and control-system functions.

I/A Series Baseplate A → RH916ND → I/A Series Baseplate B → Fieldbus Modules

Industrial Applications

Installation and Maintenance

1. Verify the complete part number: Confirm RH916ND and check that it matches the installed baseplate configuration.
2. Identify both baseplates: Confirm the designated fieldbus connection points before removing the existing cable.
3. Check connector compatibility: Verify that the cable matches the required interfaces and pin configuration.
4. Follow the maintenance procedure: Apply the appropriate equipment isolation and maintenance procedures before disconnecting the cable.
5. Inspect the cable jacket: Look for cuts, crushing, deformation, or other signs of mechanical damage.
6. Examine the connectors: Check for bent contacts, contamination, corrosion, or damaged retaining features.
7. Maintain suitable routing: Avoid sharp bends, excessive tension, and contact with sharp cabinet edges.
8. Connect the correct interfaces: Ensure that the cable is fitted to the designated fieldbus connectors rather than unrelated power or communication ports.
9. Check the bus topology: Confirm that the baseplate arrangement follows the applicable system design, including any required redundant connections.
10. Verify termination: Check that unused fieldbus connectors have the correct termination hardware where required by the installed baseplate type.
11. Test communication: Check system status indications and verify that the fieldbus link operates as expected after reconnection.
12. Record the maintenance work: Document the installed cable reference, connected baseplates, termination arrangement, and test results.

Compatible System Components

Recommended Related Models

Key Advantages

• Supports the 2 Mbps module fieldbus connection between compatible baseplates.
• Provides a short cable for closely positioned hardware.
• Uses shielded twisted-pair construction for the specified fieldbus application.
• Supports replacement of an existing cable while preserving the established connection architecture.

Technical FAQs

What is the relationship between RH916ND and P0916ND?

RH916ND is the updated reference associated with the legacy P0916ND cable. The exact replacement should still be checked against the installed baseplate type and required cable construction.

Which baseplates are compatible with the RH916ND?

The related legacy cable documentation identifies P0914XA and P0914XB baseplates for the 0.25-meter base-to-base cable. Confirm the actual baseplate model and connection requirements before installation.

Does the RH916ND require a fieldbus terminator?

Termination depends on the baseplate configuration and bus topology. Applicable legacy baseplates may require a designated terminator on an unused fieldbus connector. Follow the system’s installation requirements rather than assuming the connection is internally terminated.

What should be checked if communication fails after cable replacement?

Inspect connector seating, cable condition, baseplate compatibility, and the required termination arrangement. Also verify that the cable connects to the intended interfaces and that the overall fieldbus configuration meets the system requirements.