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- Power Supply Cable
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Product Overview
The Foxboro RH926KN is an I/A Series power supply cable used to connect compatible Foxboro 200 Series power supplies to modular baseplates. It carries the DC output from the power supply to the baseplate, supporting power distribution to the fieldbus modules installed in the control subsystem.
With a cable length of 1.5 meters, the RH926KN suits cabinet layouts where the power supply and baseplate are separated by a longer routing distance than shorter cable variants can accommodate. Its function is specific to the supply-to-baseplate connection, rather than the input-side cable that connects an incoming DC terminal block to the power supply.
The RH926KN supersedes the older P0926KN designation for the corresponding cable configuration. During replacement or system expansion, the power supply, baseplate family and connector arrangement should be checked together. Selecting a cable based only on its length can lead to an incorrect connection where older and newer baseplate types are present.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Foxboro |
| Model | RH926KN |
| Legacy Model | P0926KN |
| Product Series | I/A Series |
| Product Type | Power Supply Cable |
| Cable Function | Power supply output to modular baseplate |
| Cable Length | 1.5 meters |
| Cable Construction | 16 AWG shielded cable |
| System Application | Foxboro 200 Series control subsystem |
| Compatible Equipment | Compatible Foxboro power supplies and modular baseplates |
| Maximum Cable Quantity | Up to six compatible baseplate power cables per power supply, subject to system requirements |
| Shipping Weight | 3 kg |
Product Features
- 1.5-meter cable length: Provides additional routing reach for control cabinets with more widely separated power supplies and baseplates.
- Dedicated output-power connection: Carries DC output power from a compatible supply to the designated modular baseplate.
- 16 AWG shielded construction: Matches the specified cable construction for this baseplate power-cable family.
- I/A Series integration: Supports power distribution in compatible Foxboro 200 Series control subsystems.
- Updated part identification: RH926KN supersedes the earlier P0926KN designation for the corresponding cable configuration.
- Multiple-baseplate support: Allows compatible power-distribution arrangements to serve multiple baseplates within system limits.
- Distinct connection function: Separates supply-to-baseplate power wiring from input-terminal-block and signal cables.
- Maintenance identification: The model and cable length help distinguish this variant from other output-power cable lengths.
Working Principle
The RH926KN creates an electrical path between the output connector of a compatible Foxboro power supply and the power input of a modular baseplate. Once the connectors are correctly seated, the cable carries the supply’s DC output to the baseplate’s power-distribution interface.
The cable itself does not regulate voltage or convert power. Those functions are performed by the power supply, while the baseplate distributes the available power to compatible modules according to the subsystem configuration. The cable must match the intended interfaces and the requirements of the connected equipment.
Where a single power supply serves multiple baseplates, the connected load must remain within the supply’s rated capacity, and the installation must follow the specified cable arrangement. A longer cable provides routing distance; it does not increase the power supply’s output rating or make the cable compatible with every baseplate generation.
Role in a Foxboro I/A Series Power Distribution Architecture
The RH926KN forms part of the output-power path between a Foxboro power supply and a modular baseplate. The supply delivers DC power, the cable transfers it to the baseplate, and the baseplate provides the electrical interfaces required by the installed fieldbus modules.
| System Component | Function | Relationship to the RH926KN |
|---|---|---|
| Foxboro RH926KN | Transfers power-supply output to a modular baseplate | Provides the designated output-power connection |
| Foxboro FPS400-24 Power Supply | Supplies 24 V DC output power | Feeds the baseplate through the cable |
| Modular Baseplate | Provides mounting and electrical interfaces for modules | Receives power through the RH926KN |
| Fieldbus Modules (FBMs) | Interface field signals with the control system | Receive power through the configured baseplate |
| Field Control Processor, Where Applicable | Performs control and communication functions | Operates within the associated control-system architecture |
| Additional Baseplate Power Cables | Carry power to other compatible baseplates | Extend power distribution within the specified system limits |
| DC Input Terminal Block Cable | Connects incoming DC power to the supply | Performs a separate input-side function |
| Control Cabinet | Houses and organizes control-system equipment | Provides mounting and cable-routing infrastructure |
Industrial Applications
| Application | Power Distribution Requirement | Role of the RH926KN |
|---|---|---|
| Process Automation Cabinets | DC power delivery to modular control-system baseplates | Connects the supply output to the receiving baseplate |
| Oil and Gas Facilities | Organized power connections for process-control equipment | Supports compatible Foxboro subsystem power distribution |
| Chemical Processing Plants | Power delivery to fieldbus module assemblies | Provides the designated output-power path |
| Power Generation Control | DC power distribution to compatible control hardware | Connects the power supply to the baseplate |
| Water and Wastewater Automation | Cabinet-based control-system power connections | Supports the configured baseplate power path |
| Industrial Process Monitoring | Power connections for modular field I/O equipment | Carries power to compatible baseplates |
| Control-System Expansion | Addition of compatible baseplates | Provides extra routing distance for the planned layout |
| Maintenance and Repair | Replacement of a damaged or incorrectly identified output cable | Restores the connection when RH926KN is the specified cable variant |
Installation and Maintenance
- Verify the cable part number: Confirm that RH926KN is the specified output cable for the installed power supply and baseplate configuration.
- Identify the baseplate type: Check the baseplate model and connector arrangement before fitting the cable.
- Isolate the power supply: Follow the site’s electrical isolation and lockout procedures before disconnecting or replacing the cable.
- Inspect the connectors: Check for damaged housings, bent contacts, contamination or other conditions that could prevent proper mating.
- Confirm connector compatibility: Ensure both cable ends match their designated interfaces without forcing or modifying the connectors.
- Plan the cable route: Use the 1.5-meter length to reach the connection points without excessive tension or strain on the connectors.
- Prevent mechanical damage: Avoid sharp bends, crushing, abrasion and contact with hot surfaces or moving components.
- Maintain cabinet organization: Route the cable so it does not obstruct module access, ventilation paths or other service points.
- Secure both connections: Confirm that the connectors are fully seated and any applicable retaining features are engaged.
- Verify power-system capacity: Check that the connected baseplates and installed modules remain within the power supply’s specified output limits.
- Inspect before energizing: Check the cable jacket, connector seating and routing before restoring power.
- Record the replacement: Document the installed part number and any connector or wiring issues to support future maintenance and spare-parts identification.
Related Components
| Component | Function | Relationship to the RH926KN |
|---|---|---|
| Foxboro FPS400-24 Power Supply | Supplies DC output power | Provides the output connected to the baseplate |
| Foxboro Modular Baseplate | Houses and electrically connects compatible modules | Receives power through the RH926KN |
| Foxboro P0926KN | Legacy baseplate power supply cable designation | Superseded by RH926KN for the corresponding configuration |
| Foxboro RH926KK | Baseplate power supply cable, 0.4-meter variant | Provides a shorter cable option for compatible installations |
| Foxboro RH926KL | Baseplate power supply cable, 0.9-meter variant | Provides a shorter routing option |
| Foxboro RH926KM | Baseplate power supply cable, 1.2-meter variant | Provides a shorter routing option |
| Foxboro RH926KP | Baseplate power supply cable, 1.8-meter variant | Provides a longer routing option |
| Foxboro RH926KQ | Baseplate power supply cable, 2.1-meter variant | Supports another cable-length requirement |
| Foxboro RH923NG | Power-distribution Y-cable | Provides additional physical power connections in compatible installations |
| Foxboro RH923DG | DC input terminal block cable | Connects the input terminal block to the power supply rather than the supply to a baseplate |
Recommended Related Models
| Model | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Foxboro RH926KN | I/A Series Power Supply Cable | Main product | 1.5-meter cable for compatible modular baseplates |
| Foxboro P0926KN | I/A Series Power Supply Output Cable | Legacy designation | Corresponding earlier cable reference |
| Foxboro RH926KK | I/A Series Power Supply Cable | Shorter cable variant | 0.4-meter length for compatible installations |
| Foxboro RH926KL | I/A Series Power Supply Cable | Shorter cable variant | 0.9-meter length for compatible installations |
| Foxboro RH926KM | I/A Series Power Supply Cable | Shorter cable variant | 1.2-meter length for compatible installations |
| Foxboro RH926KP | I/A Series Power Supply Cable | Longer cable variant | 1.8-meter length for compatible installations |
| Foxboro RH926KQ | I/A Series Power Supply Cable | Longer cable variant | 2.1-meter length for compatible installations |
| Foxboro RH923NG | I/A Series Power Distribution Y-Cable | Related distribution component | Provides additional physical connections in compatible installations |
Key Advantages
- Provides a defined 1.5-meter power connection for compatible Foxboro modular baseplates.
- Uses the specified 16 AWG shielded cable construction.
- Supports organized DC power distribution within Foxboro 200 Series control cabinets.
- Provides an updated part-number reference corresponding to the legacy P0926KN designation.
- Keeps baseplate output-power wiring distinct from input-terminal-block and signal connections.
Technical FAQs
What is the function of the Foxboro RH926KN in a 200 Series subsystem?
The RH926KN carries DC output power from a compatible Foxboro power supply to a modular baseplate. It serves the output-power connection rather than the incoming power connection to the supply.
How does RH926KN differ from RH926KM?
RH926KN is 1.5 meters long, while RH926KM is 1.2 meters long. Both belong to the baseplate power-cable family, so selection depends on the required routing distance and the cable configuration specified for the installation.
Can RH926KN be used with older P0914XA/XB baseplates?
Compatibility should not be assumed. Older P0914XA/XB baseplates use a separately identified cable family. Check the exact baseplate part number and connector arrangement before selecting RH926KN.
What checks help identify a fault in the RH926KN power connection?
Inspect connector seating and cable condition, then check the power supply’s status and the baseplate’s power connection. Confirm that the subsystem load is within the supply’s rated capacity. Isolate the equipment before disconnecting or inspecting electrical connections.