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- RH916NK
- HDLC Base-to-Base Cable
- USA
- 0.12 meters
- 3 kg
- Xiamen, China
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Product Overview
The Foxboro RH916NK is an I/A Series HDLC base-to-base cable assembly used for short-distance communication between compatible control-system interfaces. It is associated with the earlier P0916NK cable reference and retains the same general application: providing a direct electrical connection between two compatible 9-pin interfaces in an installed Foxboro control system. The specified cable length is 0.12 meters, making it suitable for closely positioned connection points. <Cite refs={[“turn495866search1″,”turn495866search8”]}/>
In a control cabinet, short interconnection cables are often used where two hardware interfaces must communicate without introducing unnecessary cable slack. The RH916NK provides the physical signal path between the designated endpoints, while the connected equipment manages the communication protocol and data exchange.
The cable is a passive component. It does not execute control logic, route network traffic, or convert one communication protocol into another. Its suitability depends on the required pin assignment, connector arrangement, and compatibility of the connected interfaces.
When replacing an existing P0916NK assembly, maintenance personnel should verify the complete cable reference and connector configuration before installation. A matching connector shape alone does not guarantee that another cable has the correct internal wiring for the intended HDLC connection.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Foxboro |
| Model | RH916NK |
| Associated Earlier Reference | P0916NK |
| Product Family | I/A Series |
| Product Type | 9-Pin HDLC Base-to-Base Cable |
| Communication Protocol | HDLC |
| Connector A | 9-pin male |
| Connector B | 9-pin male |
| Cable Length | 0.12 meters |
| Connection Type | Base-to-base communication |
| Operating Function | Electrical signal transmission |
| Shipping Weight | 3 kg |
Product Features
- HDLC signal connection: Provides a physical communication path between compatible interfaces.
- Dual 9-pin male connectors: Supports the specified connector arrangement at both ends.
- Short-distance interconnection: Fits closely positioned connection points in control-system installations.
- Passive cable construction: Carries electrical signals without active data processing.
- Replacement compatibility: RH916NK is associated with the earlier P0916NK reference.
- Cabinet wiring integration: Supports organized connections between designated control-system interfaces.
Working Principle
The RH916NK carries electrical communication signals between two compatible 9-pin interfaces. When the connected hardware exchanges HDLC data, the cable provides the conductive path required for signal transmission.
Compatible Interface A → RH916NK Cable → Compatible Interface B
The cable does not generate HDLC messages or interpret the information being exchanged. Successful communication depends on the connected equipment, interface configuration, electrical characteristics, and correct cable wiring.
Because the connection is short, connector seating and mechanical strain are important during installation. A connector that is not fully engaged may interrupt the signal path, while excessive tension or repeated bending can damage the cable or its terminations.
If a communication fault appears after maintenance, check both connectors, the cable condition, and the designated interface assignments. Where necessary, test the cable’s continuity and pin-to-pin wiring using the applicable maintenance procedure before replacing active control-system hardware.
Role in the Foxboro I/A Series Communication Architecture
The RH916NK provides the physical connection layer for a compatible base-to-base communication link. The connected control-system equipment handles protocol processing and the exchange of system data.
I/A Series Interface A → RH916NK → I/A Series Interface B → Control-System Communication Functions
| System Element | Function |
|---|---|
| RH916NK | Carries electrical signals between compatible interfaces |
| First 9-Pin Interface | Provides one endpoint of the communication link |
| Second 9-Pin Interface | Provides the other endpoint of the communication link |
| Control-System Hardware | Processes data and performs assigned system functions |
| Connector Retaining Hardware | Secures the cable at the mating interfaces |
| Cabinet Wiring Arrangement | Maintains the intended routing and separation of connections |
Industrial Applications
| Application | Practical Use |
|---|---|
| Foxboro I/A Series Control Cabinets | Maintaining short communication connections between compatible interfaces |
| Distributed Control Systems | Supporting designated base-to-base signal paths |
| Process Automation Plants | Replacing a matching cable during control-system maintenance |
| Chemical Processing Facilities | Maintaining communication connections within installed control cabinets |
| Oil and Gas Control Systems | Supporting compatible equipment interconnections |
| Power Generation Facilities | Servicing communication wiring in automation cabinets |
| Control Cabinet Refurbishment | Replacing a damaged cable without changing the system layout |
| Communication Fault Diagnosis | Checking the physical connection when a communication link fails |
Installation and Maintenance
- Verify the complete model reference: Confirm RH916NK and check whether the installed assembly is identified under the earlier P0916NK reference.
- Identify both connection points: Confirm the designated interfaces before disconnecting the existing cable.
- Check connector compatibility: Verify that both ends match the required 9-pin male configuration and the corresponding mating interfaces.
- Follow the maintenance procedure: Apply the required system isolation or communication-maintenance procedure before removing the cable.
- Inspect the cable jacket: Look for cuts, crushing, deformation, or other signs of mechanical damage.
- Examine the connector contacts: Check for bent pins, contamination, corrosion, and damaged connector housings.
- Protect the connectors: Avoid forcing the plugs into their sockets or overtightening connector fasteners.
- Maintain appropriate routing: Prevent the cable from being stretched, sharply bent, or trapped beneath cabinet hardware.
- Reconnect both ends: Ensure each connector is fully seated at its designated interface and secured according to the installation requirements.
- Check the pin assignment: Confirm the cable wiring against the applicable system documentation if compatibility is uncertain.
- Verify communication: Check the relevant system status indications after reconnection and confirm that the communication link operates as expected.
- Record the maintenance work: Document the installed reference, connection points, inspection findings, and post-maintenance test results.
Compatible System Components
| Component | Function |
|---|---|
| Foxboro RH916NK | Provides the 9-pin HDLC cable connection |
| Foxboro P0916NK | Earlier associated cable reference |
| Compatible I/A Series Interface | Provides one endpoint of the communication link |
| Compatible Base Interface | Provides the other endpoint of the designated connection |
| I/A Series Control Hardware | Performs assigned control and data-processing functions |
| Connector Retaining Hardware | Secures the cable at the mating interfaces |
| Control Cabinet Wiring | Routes communication connections between installed components |
| System Status Interface | Supports communication-status checks where available |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Foxboro P0916NK | 9-Pin HDLC Base-to-Base Cable | Earlier reference associated with RH916NK |
| Foxboro P0916ND | Module Fieldbus Cable | Short baseplate-to-baseplate fieldbus connection in compatible legacy installations |
| Foxboro P0916NA | Module Fieldbus Cable | Longer fieldbus connection between compatible legacy baseplates |
| Foxboro RH916DA | Termination Cable Assembly | Connecting compatible fieldbus modules to termination assemblies |
| Foxboro RH916DB | Termination Cable Assembly | Field termination connection for compatible I/A Series configurations |
| Foxboro RH916DC | Termination Cable Assembly | Longer field termination cable arrangement |
Key Advantages
- Provides a short electrical communication path between compatible interfaces.
- Uses the specified dual 9-pin male connector arrangement.
- Supports maintenance and replacement of an existing I/A Series cable connection.
- Helps preserve the intended cabinet communication layout.
Technical FAQs
Is RH916NK associated with the earlier P0916NK cable?
Yes. RH916NK is listed by a product distributor as the newer associated reference for P0916NK. Before replacement, confirm the complete cable configuration and connector wiring required by the installed system.
What should be verified before using RH916NK in place of P0916NK?
Check the connector arrangement, pin assignment, intended interface, and system compatibility. The relationship between the part references should be confirmed for the particular installation rather than inferred from the shared product description.
What can cause intermittent communication through this cable?
Possible causes include loose connectors, damaged pins, broken conductors, or mechanical strain. Incorrect wiring or connection to the wrong interface can also prevent reliable communication.
Can a standard 9-pin serial cable be used as a substitute?
Not without verifying the wiring. A physically compatible connector does not guarantee the correct pinout or electrical characteristics for the intended HDLC base-to-base connection.