Product Overview

The Foxboro P0916DB is an I/A Series termination cable used to establish the electrical interconnection between termination hardware and the associated Foxboro I/A Series I/O equipment. It forms part of the physical signal path within an I/A Series control cabinet, allowing field termination arrangements to be connected with the corresponding electronic I/O hardware.

In a typical Foxboro installation, field instruments are wired to termination hardware rather than directly to the electronic I/O interface. The termination cable carries the corresponding circuit connections between these two sections. This arrangement keeps field wiring organized and allows the I/O electronics to remain separated from the field termination area.

The P0916DB is a passive interconnection component. It does not independently process input signals, generate control commands, or execute control logic. Its function is to maintain the required electrical connection between the termination arrangement and the associated I/O hardware.

The cable is particularly relevant to maintenance and replacement work on established I/A Series systems. When replacing an existing cable, technicians should verify the associated termination hardware, I/O equipment, cable routing, and connector interfaces against the applicable system documentation before returning the system to service.

Technical Specifications

Product Features

• Termination cable for Foxboro I/A Series control-system installations
• Provides an electrical connection between termination hardware and associated I/O equipment
• Functions as a passive signal interconnection
• Supports organized field I/O wiring within control cabinets
• Keeps termination hardware physically separated from electronic I/O equipment
• Suitable for established Foxboro I/A Series installations
• Useful for replacement of existing termination cables during system maintenance
• Supports structured signal routing between field termination and I/O hardware
• Suitable for retrofit and cabinet refurbishment work
• Helps preserve the existing I/A Series wiring architecture during cable replacement

Working Principle

The P0916DB functions as the electrical path between an I/A Series termination arrangement and the associated I/O hardware. It does not interpret or modify the process signal. Instead, it carries the corresponding circuit connections through the cabinet between the two system sections.

For an input signal, the general path can be represented as:

Field Device → Field Wiring → Termination Hardware → P0916DB → I/A Series I/O Hardware → Control System

A field transmitter, switch, or other instrument sends its signal through the field wiring to the termination arrangement. The P0916DB then carries the corresponding connection toward the I/O interface, where the signal is processed by the appropriate I/A Series electronics.

For output circuits, the signal direction is reversed:

Control System → I/A Series I/O Hardware → P0916DB → Termination Hardware → Field Device

In this direction, the cable carries the output circuit from the I/O hardware toward the termination arrangement and connected field device.

Because the cable is part of a fixed system interconnection, connector identification and correct routing are important during maintenance. A cable that is physically connected but assigned to the wrong termination or I/O interface can result in incorrect point-to-point signal routing.

Role in a Foxboro I/A Series I/O Control Architecture

The P0916DB occupies the interconnection layer between the field termination hardware and the electronic I/O section. It connects the organized field wiring arrangement with the associated I/A Series I/O hardware without performing active signal processing itself.

Industrial Applications

Installation and Maintenance

1. Confirm the part number — Verify that the P0916DB matches the existing I/A Series termination and I/O arrangement before installation.
2. Review system documentation — Check cabinet drawings, termination schedules, and I/O documentation to identify both cable connection points.
3. Isolate the relevant equipment — Follow the plant’s approved shutdown, isolation, and electrical safety procedures before disconnecting the existing cable.
4. Identify both interfaces — Confirm the termination-side and I/O-side connection points before removing the installed cable.
5. Inspect the cable — Check the cable assembly and accessible connectors for damage, contamination, corrosion, or other visible abnormalities.
6. Remove the existing cable carefully — Disconnect both ends according to the applicable maintenance procedure without placing excessive stress on connectors or adjacent wiring.
7. Verify cable routing — Confirm that the replacement cable follows the intended cabinet routing and does not interfere with other equipment or wiring.
8. Install the replacement — Connect the P0916DB to the correct termination and I/O interfaces and ensure that the connections are fully seated.
9. Check connection identification — Verify both cable ends against the cabinet documentation to prevent incorrect point-to-point connections.
10. Perform continuity verification — Where applicable, check the completed interconnection before restoring the I/O section to normal operation.
11. Perform a controlled signal check — Confirm representative input or output points after replacement and investigate any unexpected signal behavior.
12. Document the maintenance work — Record the installed cable model, associated I/O hardware, termination arrangement, and test results for future service activities.

Related Components

Recommended Related Models

Key Advantages

• Provides a dedicated electrical interconnection between I/A Series termination and I/O hardware.
• Maintains the established field-wiring architecture of Foxboro control cabinets.
• Functions as a passive signal path without independent signal processing.
• Supports organized routing of field I/O connections.
• Suitable for maintenance and replacement of existing I/A Series installations.
• Helps preserve established point-to-point wiring during cabinet service work.

Technical FAQs

What is the purpose of the Foxboro P0916DB?

The P0916DB is an I/A Series termination cable used to connect termination hardware with associated I/A Series I/O equipment. It carries the corresponding electrical connections but does not independently process the signals.

Is the P0916DB an active I/O component?

No. The P0916DB is a passive cable assembly. Signal processing and control functions are performed by the associated I/A Series I/O and control-system hardware.

What should be checked before replacing the P0916DB?

The termination arrangement, associated I/O hardware, cable connection points, cabinet documentation, and cable routing should be verified before removal. Both cable ends should be positively identified to avoid incorrect connections.

What problems can occur after an incorrect termination-cable installation?

An incorrectly connected cable can route a signal to the wrong I/O point or interrupt the intended signal path. Point-to-point verification and a controlled input/output signal check can help identify incorrect connections before the system is returned to normal operation.