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- Module Fieldbus Cable
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Product Overview
The Foxboro P0916NB I/A Series Module Fieldbus Cable is a 5-meter cable assembly used in compatible Foxboro I/A Series distributed control systems. It provides the physical connection between a modular baseplate and a field termination assembly, allowing fieldbus modules to interface with the corresponding field wiring.
In a distributed control system, Fieldbus Modules (FBMs) handle process inputs and outputs, while termination assemblies provide the interface between the control hardware and field devices. The cable connecting these components must match the module type, termination assembly, connector arrangement, and installed system architecture.
The P0916NB belongs to the I/A Series module fieldbus cable family. It is the legacy Hypalon-cable designation for the 5-meter version. Related part numbers include P0928BR for the LSZH version and RH916NB for the corresponding RoHS cable designation. These versions should be distinguished when selecting replacement parts because cable construction and product specifications may differ.
For maintenance engineers, the P0916NB is relevant when replacing an existing cable, restoring a field I/O connection, or maintaining a control cabinet with compatible I/A Series hardware. Correct cable identification is particularly important when several module and termination cable families are installed in the same system.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Foxboro |
| Product Type | I/A Series Module Fieldbus Cable |
| Model | P0916NB |
| Product Family | Foxboro I/A Series |
| Cable Category | Module Fieldbus Cable |
| Cable Length | 5 meters |
| Cable Construction | Legacy Hypalon jacket with XLPE primary conductor insulation |
| Associated LSZH Part Number | P0928BR |
| Associated RoHS Part Number | RH916NB |
| Typical Application | Connection between compatible modular baseplates and field termination assemblies |
| Shipping Weight | 3 kg |
Product Features
- 5-meter cable length: Supports installations requiring the specified connection distance between compatible control-system components.
- Module fieldbus connection: Provides the cable link between designated module interfaces and termination assemblies.
- I/A Series integration: Belongs to the cable family used in compatible Foxboro modular control systems.
- Legacy Hypalon construction: Uses a Hypalon outer jacket and XLPE primary conductor insulation.
- Related cable versions: Has associated LSZH and RoHS designations that can assist with replacement-part identification.
- Field I/O support: Helps maintain the electrical connection between fieldbus modules and field termination hardware.
- Maintenance replacement: Can be used when the existing installation specifies this cable type and the connection interfaces are compatible.
- Configuration-dependent compatibility: Requires verification of the FBM, termination assembly, and cable arrangement before installation.
Working Principle
The P0916NB provides the physical electrical connection between compatible Foxboro I/A Series control hardware and its associated field termination assembly. It does not independently process signals or execute control logic. Instead, it carries the electrical connections required by the designated module-to-termination interface.
A typical field I/O signal path follows this arrangement:
Field Device → Field Wiring → Termination Assembly → P0916NB Cable → Fieldbus Module → Control Processor
For an input channel, a process signal travels from the field device through the field wiring and termination assembly to the associated FBM. The module processes the input according to its specific function and transfers the resulting information through the control-system architecture.
For an output channel, the control system sends a command through the appropriate module and termination arrangement toward the connected field device. The exact signal path and electrical characteristics depend on the installed FBM and termination assembly.
Cable compatibility is determined by more than its length. The connector arrangement, cable construction, module interface, and termination hardware must all match the application. A cable intended for module fieldbus connections should not automatically be substituted for a baseplate-to-baseplate communication cable or a cable from another termination-cable family.
The P0916NB’s legacy Hypalon construction is also relevant to maintenance planning. Hypalon-jacketed cables use a different material construction from LSZH versions. Although related part numbers exist, engineers should confirm the approved replacement designation and environmental requirements before substituting one version for another.
When field I/O faults occur, the cable should be checked alongside the termination assembly, field wiring, and FBM. A damaged cable or poorly seated connector can interrupt the electrical path, but a similar symptom may also result from a defective field device, incorrect wiring, or a module fault.
Role in the Foxboro I/A Series Control Architecture
The P0916NB supports the physical connection between fieldbus modules and compatible termination assemblies within a Foxboro I/A Series distributed control system. It forms part of the field I/O infrastructure that connects process equipment to the control hardware.
Field Devices → Field Wiring → Termination Assembly → P0916NB → Fieldbus Module → Control Processor
| System Component | Function |
|---|---|
| P0916NB Cable | Connects the designated module interface to the compatible termination assembly |
| Fieldbus Module | Processes field inputs or controls outputs according to its configuration |
| Termination Assembly | Interfaces field wiring with the associated control module |
| Field Devices | Measure process variables or receive control commands |
| Field Wiring | Carries electrical signals between field equipment and termination hardware |
| Modular Baseplate | Accommodates compatible fieldbus modules |
| Control Processor | Executes the control strategy and processes system data |
| Engineering and Diagnostic Tools | Support configuration verification and fault investigation |
The P0916NB is a passive connection component. Its function depends on the installed FBM, the matching termination assembly, and the overall control-system configuration.
Industrial Applications
| Application | Typical Use |
|---|---|
| Distributed Control Systems | Connecting compatible fieldbus modules and termination assemblies |
| Process Automation | Maintaining field I/O connections in modular control cabinets |
| Chemical Processing | Supporting field-signal connections in process-control systems |
| Oil and Gas Facilities | Maintaining installed Foxboro I/A Series field I/O infrastructure |
| Power Generation | Supporting connections between control modules and termination hardware |
| Industrial Manufacturing | Connecting field I/O hardware within compatible automation systems |
| Plant Maintenance | Replacing a damaged or defective module fieldbus cable |
| Control-System Expansion | Establishing additional field I/O connections where supported by the hardware |
| Legacy DCS Support | Maintaining existing installations that use the P0916NB cable family |
| Control Cabinet Refurbishment | Restoring cable connections during planned maintenance or hardware replacement |
Application suitability depends on the FBM model, termination assembly, connector arrangement, and environmental requirements. The original cable designation should be checked against the installed system documentation before replacement.
Installation and Maintenance
- Verify the part number: Confirm that P0916NB is the specified cable for the intended Foxboro I/A Series module fieldbus connection.
- Check the FBM model: Identify the installed Fieldbus Module and verify that its interface supports the required cable assembly.
- Confirm termination compatibility: Match the cable to the designated termination assembly and its connector arrangement.
- Review the wiring drawings: Identify the correct connection points and document the existing cable routing before disconnection.
- Follow site safety procedures: Apply the appropriate electrical isolation and maintenance procedures before working on the control hardware.
- Inspect the cable jacket: Check for cuts, abrasion, crushing, cracking, or other visible damage that could affect cable integrity.
- Examine the connectors: Look for damaged housings, contaminated contacts, or signs of poor mechanical engagement.
- Secure the connections: Connect both ends to their designated interfaces and ensure that the connectors are fully seated.
- Route the cable correctly: Avoid sharp bends, excessive tension, crushing, and contact with sharp cabinet edges.
- Check cable separation: Follow the installation’s wiring practices for routing fieldbus cables near power conductors and potential sources of electrical interference.
- Verify field I/O operation: After installation, check module status, system diagnostics, and the relevant input or output signals.
- Document the replacement: Record the installed part number, connected hardware, and commissioning results in the maintenance records.
If a field signal remains unavailable after cable replacement, inspect the termination assembly, field wiring, connected device, and FBM status. Confirm the fault location before replacing additional hardware.
Compatible System Components
The P0916NB belongs to the Foxboro I/A Series module fieldbus cable family. Associated components must match its intended connection function and the installed system configuration.
| Component | Function |
|---|---|
| Foxboro I/A Series Fieldbus Modules | Interface with process signals and field devices |
| Compatible Modular Baseplates | Accommodate fieldbus modules and provide the required hardware interfaces |
| Compatible Termination Assemblies | Connect field wiring to the associated FBM |
| Foxboro Field Control Processors | Execute control strategies in supported I/A Series configurations |
| Field Wiring Assemblies | Connect process instruments and actuators to termination hardware |
| Compatible Module Fieldbus Cables | Provide the required physical connection between module and termination interfaces |
| System Power Supplies | Supply the installed control hardware |
| Engineering and Diagnostic Tools | Support configuration checks and troubleshooting |
Recommended Related Models
| Model | Product Type | Relevance |
|---|---|---|
| Foxboro P0928BR | I/A Series Module Fieldbus Cable, LSZH, 5 m | Related LSZH version of the 5-meter cable |
| Foxboro RH916NB | I/A Series Module Fieldbus Cable, RoHS, 5 m | Related RoHS cable designation for the same length |
| Foxboro P0916NC | I/A Series Module Fieldbus Cable, 3 m | Shorter cable option within the same cable family |
| Foxboro P0916NA | I/A Series Module Fieldbus Cable, 10 m | Longer cable option within the same cable family |
| Foxboro P0916ND | I/A Series Module Fieldbus Cable, 0.25 m | Short cable option for compatible connections |
| Foxboro P0916MZ | I/A Series Module Fieldbus Cable, 1 m | Related cable option for shorter connection distances |
Key Advantages
- Provides a dedicated cable connection for compatible I/A Series field I/O hardware.
- Offers a 5-meter length for installations requiring the corresponding cable run.
- Supports maintenance of existing systems using the legacy P0916NB designation.
- Has related LSZH and RoHS cable designations for replacement-part identification.
- Helps maintain the intended connection between fieldbus modules and termination assemblies when the correct interfaces are used.
Technical FAQs
Is the Foxboro P0916NB an 8-channel isolated output module?
No. P0916NB is listed as a 5-meter I/A Series module fieldbus cable. It is a passive cabling component, not an output module. The required output-channel count and isolation characteristics must be identified from the actual FBM model.
What is the difference between P0916NB and P0928BR?
P0916NB is the legacy Hypalon-jacketed cable designation, while P0928BR is the associated LSZH version for the same nominal cable length. The cable construction differs, so the replacement should be selected according to the installation’s material and environmental requirements.
Can RH916NB be used instead of P0916NB?
RH916NB is an associated RoHS cable designation for the 5-meter module fieldbus cable family. Before substitution, verify the required connector arrangement, cable construction, and system-specific replacement requirements.
What should be checked if field I/O signals fail after cable replacement?
Check the cable connections, termination assembly, field wiring, module status, and system diagnostics. Confirm that the correct cable is installed and that both ends are connected to the intended interfaces. If the connection is intact, investigate the field device and FBM before concluding that the cable is defective.