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- Module Fieldbus Cable
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Product Overview
The Foxboro RH916NA I/A Series Module Fieldbus Cable is a 10-meter cable used to connect compatible fieldbus modules and modular baseplates within Foxboro I/A Series distributed control systems. It belongs to the module fieldbus cable family used to establish the physical connection required by the installed control-system configuration.
In a modular DCS installation, Fieldbus Modules (FBMs) handle process inputs and outputs, while modular baseplates accommodate the modules and provide the necessary connection interfaces. The module fieldbus cable links the appropriate hardware interfaces, supporting the signal path between field I/O hardware and the wider control system.
The RH916NA is the RoHS-designated version associated with the legacy P0916NA module fieldbus cable. Related versions include P0928BS, the LSZH cable designation. Although these cables share the nominal 10-meter length, their construction and material specifications differ, so replacement selection should account for the version required by the installation.
The RH916NA is relevant to maintenance work involving damaged cables, restoration of existing fieldbus connections, and servicing of compatible modular control cabinets. Before installation, engineers should verify the cable designation, connected hardware, connector arrangement, and required cable construction to ensure that the replacement matches the original system configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Foxboro |
| Product Type | I/A Series Module Fieldbus Cable |
| Model | RH916NA |
| Product Family | Foxboro I/A Series |
| Cable Category | Module Fieldbus Cable |
| Cable Length | 10 meters |
| Cable Version | RoHS |
| Associated Legacy Part Number | P0916NA |
| Associated LSZH Part Number | P0928BS |
| Typical Application | Connection between compatible fieldbus modules and modular baseplates |
| Shipping Weight | 3 kg |
Product Features
- 10-meter cable length: Supports installations requiring a longer module fieldbus connection within a compatible I/A Series configuration.
- Module fieldbus connectivity: Provides the physical cable connection between designated module and baseplate interfaces.
- RoHS designation: Identifies the RH916NA version within the Foxboro module fieldbus cable family.
- I/A Series compatibility: Supports compatible modular control-system installations.
- Related cable versions: Has associated legacy and LSZH designations for replacement-part identification.
- Maintenance replacement: Supports restoration of an existing fieldbus connection when the RH916NA specification matches the installed system.
- Configuration-specific selection: Requires verification of the connected module, baseplate, and interface arrangement before installation.
Working Principle
The RH916NA provides the physical electrical connection between compatible fieldbus modules and modular baseplates in a Foxboro I/A Series control system. The cable carries the signals required by the designated interfaces; it does not independently process field measurements or execute control logic.
In a typical installation, field devices connect through field wiring and termination assemblies to the appropriate FBM. The module performs its configured input or output function, while the associated baseplate and module fieldbus connection provide the hardware link required by the system architecture.
A simplified signal path is:
Field Devices → Field Wiring → Termination Assembly → Fieldbus Module → RH916NA Cable Connection → Modular Baseplate and Control-System Infrastructure
The precise connection arrangement depends on the installed FBM, baseplate, and termination hardware. The RH916NA should therefore be selected for the documented module fieldbus connection rather than treated as a universal cable for all I/A Series interfaces.
The 10-meter length is useful where the designated connection requires a longer cable run. However, cable length alone does not establish compatibility. Connector configuration, cable type, connected hardware, and the approved system arrangement must also match.
The cable designation should also be distinguished from related versions. RH916NA is associated with the RoHS designation, P0916NA is the legacy version, and P0928BS is the corresponding LSZH version. These variants should not be assumed interchangeable without checking the installation requirements.
During troubleshooting, inspect the cable jacket, connectors, and connection points. If the expected field I/O function is not restored, check the termination assembly, FBM status, field wiring, and system diagnostics to determine whether the fault originates elsewhere in the signal path.
Role in the Foxboro I/A Series Control Architecture
The RH916NA supports fieldbus connectivity within compatible Foxboro I/A Series distributed control systems. It forms part of the physical cabling infrastructure that connects designated fieldbus hardware to the modular control architecture.
Field Devices → Field Wiring → Termination Assembly → Fieldbus Module → RH916NA Cable → Modular Baseplate → Control-System Infrastructure
| System Component | Function |
|---|---|
| RH916NA Cable | Provides the designated 10-meter module fieldbus connection |
| Modular Baseplate | Accommodates compatible fieldbus modules and provides connection interfaces |
| Fieldbus Module | Processes field inputs or controls outputs according to its configuration |
| Termination Assembly | Connects field wiring to the appropriate module interface |
| Field Devices | Measure process variables or receive control commands |
| Field Wiring | Carries electrical signals between field devices and termination hardware |
| Control Processor | Executes configured control logic and processes system data |
| Engineering and Diagnostic Tools | Support configuration checks and fault investigation |
The RH916NA is a passive cabling component. Its function depends on compatible modules, baseplates, termination hardware, and the installed control-system configuration.
Industrial Applications
| Application | Typical Use |
|---|---|
| Distributed Control Systems | Connecting compatible fieldbus modules and baseplates |
| Process Automation | Maintaining field I/O connections in modular control cabinets |
| Chemical Processing | Supporting field-signal connections in process-control installations |
| Oil and Gas Facilities | Maintaining compatible Foxboro I/A Series field I/O infrastructure |
| Power Generation | Supporting control-system fieldbus connections in plant automation |
| Industrial Manufacturing | Connecting designated fieldbus hardware within modular systems |
| Plant Maintenance | Replacing a damaged module fieldbus cable |
| Control-System Expansion | Supporting additional field I/O connections where specified by the system design |
| Legacy DCS Maintenance | Maintaining installations that use the RH916NA cable designation |
| Control Cabinet Refurbishment | Restoring fieldbus connections during planned maintenance |
Application suitability depends on the connected hardware, cable construction, and system configuration. Engineers should verify the specified cable type before replacement or expansion.
Installation and Maintenance
- Verify the part number: Confirm that RH916NA is the specified cable for the intended Foxboro I/A Series connection.
- Check module compatibility: Identify the installed FBM and verify that its interface supports the required cable arrangement.
- Confirm baseplate compatibility: Check the associated modular baseplate and its designated fieldbus connection.
- Review system drawings: Identify the correct connection points and cable routing before disconnecting the existing cable.
- Follow site safety procedures: Apply the required isolation and maintenance procedures before accessing control-system hardware.
- Inspect the cable jacket: Look for cuts, abrasion, crushing, cracking, or other visible damage that could affect cable integrity.
- Examine the connectors: Check the connector housings and contacts for contamination, deformation, or damage.
- Align the connectors correctly: Match each connector to its intended interface and avoid forcing an incompatible connection.
- Secure both ends: Ensure that the cable is fully seated and secured at the specified connection points.
- Route the cable carefully: Avoid sharp bends, excessive tension, crushing, and contact with sharp cabinet edges.
- Verify field I/O operation: After installation, check the connected hardware status, system diagnostics, and relevant input or output signals.
- Document the replacement: Record the installed part number, connected hardware, and verification results in the maintenance records.
If the expected function is not restored, inspect the termination assembly, field wiring, FBM status, and associated baseplate interfaces. Confirm the fault location before replacing additional components.
Compatible System Components
The RH916NA is intended for compatible Foxboro I/A Series module fieldbus connections. Related components must match the cable’s designated function and the installed system architecture.
| Component | Function |
|---|---|
| Foxboro I/A Series Modular Baseplates | Accommodate compatible fieldbus modules and their connections |
| Foxboro Fieldbus Modules | Interface with process signals and field devices |
| Compatible Termination Assemblies | Connect field wiring to the associated module interfaces |
| Foxboro Field Control Processors | Execute configured process-control strategies |
| Field Wiring Assemblies | Carry signals between field equipment and termination hardware |
| Compatible Module Fieldbus Cables | Provide the physical connections required by the fieldbus architecture |
| Control-System Power Supplies | Supply the installed control hardware |
| Engineering and Diagnostic Tools | Support configuration verification and troubleshooting |
Recommended Related Models
| Model | Product Type | Relevance |
|---|---|---|
| Foxboro P0916NA | I/A Series Module Fieldbus Cable, 10 m | Legacy cable designation associated with RH916NA |
| Foxboro P0928BS | I/A Series Module Fieldbus Cable, LSZH, 10 m | Related LSZH cable version |
| Foxboro RH916NB | I/A Series Module Fieldbus Cable, 5 m | Shorter cable option in the same family |
| Foxboro RH916NC | I/A Series Module Fieldbus Cable, 3 m | Shorter cable option for compatible connections |
| Foxboro RH916MZ | I/A Series Module Fieldbus Cable, 1 m | Short cable option for nearby interfaces |
| Foxboro RH916UH | I/A Series Module Fieldbus Cable, 20 m | Longer cable option in the same family |
Key Advantages
- Provides a dedicated 10-meter cable option for compatible I/A Series fieldbus connections.
- Supports the physical connection between designated fieldbus modules and baseplates.
- Helps maintain existing control-system cabling during maintenance and replacement work.
- Offers related cable designations for checking legacy and alternative cable versions.
- Supports restoration of the intended field I/O connection when installed with compatible hardware.
Technical FAQs
What is the difference between RH916NA and P0916NA?
RH916NA is the RoHS-designated version associated with the 10-meter module fieldbus cable family, while P0916NA is the legacy cable designation. Confirm the required cable construction and approved replacement requirements before substituting one version for another.
When is the 10-meter RH916NA preferable to a shorter cable?
The RH916NA is appropriate when the documented module fieldbus connection requires a 10-meter cable run. The selected length should accommodate the intended routing without excessive tension or unsuitable cable routing. The connected interfaces must still match the specified cable type.
Can P0928BS be used as a replacement for RH916NA?
P0928BS is the associated 10-meter LSZH cable version. Whether it is an acceptable replacement depends on the installation’s cable construction requirements, connector arrangement, and system documentation. Verify the approved replacement specification before installation.
What should be checked if the FBM is not communicating after cable replacement?
Confirm that RH916NA is the correct cable for the installed FBM and baseplate, and check that both connectors are fully seated. Then review the module status, termination assembly, field wiring, and available system diagnostics to isolate the source of the fault.