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- Foxboro
- RH916DD
- Termination Cable
- USA
- 5 meters
- 3 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Foxboro RH916DD is an I/A Series termination cable used for the cabinet-level electrical connection between termination hardware and associated I/A Series I/O equipment. It forms part of the signal interconnection arrangement that links field wiring termination with the electronic I/O section of a Foxboro process-control system.
In a typical I/A Series installation, field instruments are connected to a termination arrangement where the individual circuits are organized before being routed to the I/O hardware. The RH916DD carries these corresponding connections between the two sections, allowing field wiring and I/O electronics to remain separately organized within the control cabinet.
The RH916DD is a passive cable assembly and does not independently process signals or execute control functions. Its role is to maintain the intended electrical path between compatible termination and I/O hardware. This makes it applicable to original cabinet installations as well as replacement, refurbishment, and maintenance work on established I/A Series systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | RH916DD |
| Product Type | I/A Series Termination Cable |
| Product Family | Foxboro I/A Series |
| Series | I/A Series |
| Cable Function | I/O Termination Interconnection |
| System Role | Termination-to-I/O Signal Connection |
| Interface Function | Electrical Signal Interconnection |
| Component Type | Passive Cable Assembly |
| Application | I/A Series I/O Cabinet Wiring |
| Signal Path | Termination Hardware to Associated I/O Hardware |
| System Integration | Foxboro I/A Series Control System |
| Installation | Control-System Cabinet |
| Cable Length | 5 meters |
| Shipping Weight | 3 kg |
Product Features
- I/A Series termination cable for Foxboro process-control installations
- Connects compatible termination hardware with associated I/A Series I/O equipment
- Supports organized field-signal routing within control-system cabinets
- Functions as a passive electrical interconnection
- Maintains the separation between field termination and electronic I/O hardware
- Suitable for replacement of existing termination cables during system maintenance
- Supports refurbishment of established Foxboro I/A Series control cabinets
- Provides an extended termination-to-I/O connection for applicable cabinet layouts
- Helps preserve established field-point wiring relationships during replacement work
- Suitable for industrial process-control and automation applications
Working Principle
The RH916DD carries the electrical connections between an I/A Series termination arrangement and the associated I/O hardware. For an input circuit, the field device sends its process signal through field wiring to the termination assembly. The corresponding connection then travels through the RH916DD toward the I/A Series I/O interface.
Field Device → Field Wiring → Termination Assembly → RH916DD → I/A Series I/O Hardware → Control System
For an output circuit, the signal path is reversed. A control command generated by the I/A Series system travels through the I/O hardware and RH916DD to the termination arrangement and then toward the connected field device.
The cable itself does not independently condition, interpret, or process the signal. Those functions are performed by the associated I/A Series I/O and control hardware. The RH916DD maintains the physical electrical path required by the cabinet’s I/O architecture.
During replacement, the termination-side and I/O-side connections should be identified before the existing cable is removed. The connection points should then be checked against the applicable cabinet documentation to preserve the intended field-to-I/O mapping.
Role in an I/A Series Control Architecture
The RH916DD occupies the interconnection layer between field termination and the I/A Series I/O subsystem. It supports an architecture in which field wiring is organized at a termination point while the electronic I/O hardware remains separately installed within the control system.
| Control Architecture Layer | Typical Component | Relationship to RH916DD |
|---|---|---|
| Process Control | Foxboro I/A Series Controller | Executes process-control strategies |
| I/O Processing | I/A Series I/O Module | Acquires or generates process signals |
| Termination Interconnection | RH916DD | Carries electrical connections between termination and I/O hardware |
| Termination | I/A Series Termination Assembly | Organizes field wiring connections |
| Field Interface | Transmitters / Switches / Valves | Provides or receives process signals |
| Field Wiring | Instrument Cabling | Connects field devices to termination hardware |
| Process Equipment | Industrial Machinery | Generates or responds to controlled process conditions |
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Control Systems | Connects I/A Series termination arrangements with associated I/O hardware |
| Chemical Processing | Supports organized field instrumentation signal routing |
| Oil and Gas Facilities | Maintains termination-to-I/O connections in established Foxboro cabinets |
| Power Generation | Supports field signal connections within process-control systems |
| Water and Wastewater | Provides structured instrumentation wiring between termination and I/O hardware |
| Manufacturing Plants | Used within Foxboro I/A Series automation cabinets |
| Process Instrumentation | Carries electrical connections between field termination and I/O interfaces |
| System Maintenance | Replaces existing termination cables while preserving the established I/O architecture |
Installation and Maintenance
- Verify the part number — Confirm that RH916DD is the correct termination cable for the intended I/A Series termination and I/O arrangement.
- Review cabinet documentation — Check applicable wiring diagrams, termination information, and I/O records before beginning replacement work.
- Isolate the affected I/O section — Follow the plant’s approved shutdown and electrical isolation procedure before disconnecting the existing cable.
- Identify both cable ends — Record the termination-side and I/O-side connection points and affected field circuits before removal.
- Inspect the replacement cable — Check the RH916DD for visible damage, contamination, deformation, or damaged connection areas.
- Remove the existing cable carefully — Disconnect the original cable without applying excessive force to the termination assembly or I/O hardware.
- Verify the routing path — Compare the intended cable route with the original cabinet arrangement and avoid unnecessary mechanical stress.
- Install the replacement cable — Connect the RH916DD to the designated termination and I/O interfaces and ensure that each connection is fully seated.
- Confirm point identification — Check the cable connections against the cabinet documentation to ensure that the correct field circuits remain associated with their intended I/O points.
- Verify electrical continuity — Where required by the maintenance procedure, perform appropriate continuity checks before restoring the affected system section.
- Perform a controlled signal test — After energization, verify the affected input or output points and check for unexpected I/O diagnostics.
- Document the replacement — Record the installed cable model, cabinet location, affected I/O section, and relevant maintenance observations.
Related Components
| Component | Function |
|---|---|
| Foxboro I/A Series I/O Module | Acquires or generates process I/O signals |
| I/A Series Termination Assembly | Provides organized field wiring termination |
| I/A Series Controller | Executes process-control strategies |
| Field Wiring | Connects field instruments and final control elements to termination hardware |
| Field Transmitter | Supplies process measurement signals |
| Control Valve / Actuator | Receives control commands from the I/O system |
| I/O Cabinet | Houses termination and electronic I/O hardware |
| Cabinet Wiring Documentation | Defines the intended field-to-I/O connection arrangement |
Recommended Related Models
| Model / Product Family | Product Type | Typical Relationship |
|---|---|---|
| Foxboro RH916DB | I/A Series Termination Cable | Related RH916 termination cable configuration |
| Foxboro RH916DC | I/A Series Termination Cable | Related RH916 termination cable configuration |
| Foxboro P0916DD | I/A Series Termination Cable | Related I/A Series termination cable |
| Foxboro RH931RM | I/A Series Termination Cable | Related I/A Series cabinet interconnection |
| Foxboro I/A Series Termination Cables | Termination Cable Family | Associated cabinet-level I/O interconnection hardware |
Key Advantages
- Provides a dedicated electrical connection between I/A Series termination and I/O hardware
- Supports organized field-signal routing within process-control cabinets
- Maintains the established Foxboro I/A Series wiring architecture
- Functions as a passive interconnection rather than an active processing component
- Suitable for maintenance and replacement of existing I/A Series installations
- Supports structured separation between field termination and electronic I/O hardware
Technical FAQs
What is the RH916DD used for in a Foxboro I/A Series system?
The RH916DD is used as a termination cable between compatible I/A Series termination hardware and associated I/O equipment. It forms part of the cabinet-level electrical path connecting field termination with the I/O system.
Does the RH916DD process field signals?
No. The RH916DD is a passive cable assembly. Signal acquisition, processing, output control, and control logic are handled by the connected I/A Series hardware.
What should be checked before replacing an RH916DD?
The cable model, termination-side connection, I/O-side connection, affected field circuits, and cabinet routing should be checked before removal. The replacement should follow the documented connection arrangement of the existing system.
What should be verified after installing the RH916DD?
The cable connections should be checked for proper seating and correct point identification. Where applicable, continuity verification should be followed by a controlled signal test and review of system diagnostics before the affected I/O section is returned to normal operation.