Description
FOXBORO P0916AW | FBM241c Field Terminal Assembly
Architect’s Product Breakdown
The FOXBORO P0916AW is a field terminal assembly used with the FBM241c digital input/output module in the Foxboro I/A Series 200 I/O architecture. It provides the field wiring interface for eight 24 VDC contact inputs and eight switching outputs. The P0916AW is the termination hardware; the FBM241c performs the electronic I/O functions. That distinction matters when diagnosing a failed channel or sourcing a replacement for an installed DCS cabinet.
The output circuits are designed for externally supplied switching loads, with documented ratings dependent on the load type and supply arrangement. The associated FBM241c documentation lists support for 30 VDC at 5 A, 125 VDC at 600 mA for resistive loads, 125 VDC at 250 mA for inductive loads, and 120/240 VAC at 5 A, subject to the specified circuit configuration. These are not interchangeable ratings: an inductive load has different switching demands from a resistive load, and the correct protection and wiring arrangement must be maintained.
For legacy-system maintenance, check the complete termination assembly, cable part number, terminal assignments, and FBM241c revision before ordering. Foxboro documentation also identifies related P0916AX hardware with ring-lug terminals, whereas P0916AW is the compression-terminal version. The shared FBM241c association does not make the two terminal styles interchangeable without checking the installed wiring and approved configuration.
P0916AW
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | FOXBORO / Invensys |
| Model | P0916AW |
| Product type | Field Terminal Assembly (FTA) |
| System family | Foxboro I/A Series 200 I/O |
| Associated module | FBM241c |
| Digital inputs | 8 channels |
| Input signal | 24 VDC contacts |
| Digital outputs | 8 switching channels |
| Output supply | External source, according to the documented circuit arrangement |
| DC output rating | 30 VDC at 5 A, subject to the specified configuration |
| High-voltage DC resistive load | 125 VDC at 600 mA |
| High-voltage DC inductive load | 125 VDC at 250 mA |
| AC switching rating | 120 VAC or 240 VAC at 5 A, subject to the documented configuration |
| Terminal style | Compression terminals |
| Related variant | P0916AX, ring-lug termination |
| Firmware | No independent firmware; the FTA is termination hardware |
| Operating temperature | Verify the applicable assembly material and rating |
| Condition | Confirm new surplus, used, or refurbished status with the supplier |
Specification note: The listed switching ratings are associated with the FBM241c/P0916AW application documented in the Foxboro subsystem manual. They must not be interpreted as permission to operate every output at every voltage and current combination simultaneously. Verify the applicable wiring diagrams, load characteristics, protective devices, and installation restrictions before commissioning.
Field Engineer’s Pitfall Guide
Warning 1 — Do not confuse the P0916AW with the electronic FBM241c.
The P0916AW terminates field wiring; the FBM241c performs the I/O processing. If a digital input or output fails, isolate the fault across the field device, wiring, termination contacts, cable, and electronic module before replacing parts.
Warning 2 — Respect the load-specific output ratings.
A 5 A resistive-load rating does not mean a 5 A inductive load is acceptable. The documented limits differ substantially for inductive DC loads. Check contactor coils, solenoids, and other inductive devices against the appropriate rating and required suppression arrangement before connecting them.
Warning 3 — Verify the terminal style and cable assembly.
P0916AW uses compression terminals; P0916AX is the associated ring-lug variant. Confirm the physical termination style and the connecting cable before ordering. A similar-looking assembly can create wiring and maintenance problems if the terminal arrangement differs from the existing installation.
Field scenario: During a shutdown, a team replaces a termination assembly after a switching output fails. The replacement fits the mounting arrangement, but the output load rating and wiring configuration were never checked. The repair is delayed while the team investigates the mismatch. Verifying the field load, terminal style, and approved schematic before purchasing would have reduced that risk.
QA & Testing SOP — Transparency
A suitable quality-control process for the FOXBORO P0916AW should include the following checks.
1. Visual and origin inspection
- Verify the P0916AW identification and available revision or lot information.
- Inspect the housing, compression terminals, connectors, and mounting hardware.
- Check for corrosion, cracked insulation, overheated contacts, or signs of unauthorized repair.
- Review supplier traceability records where available.
2. Mechanical inspection
- Confirm the terminal layout against the approved FBM241c wiring drawing.
- Verify the termination cable and connector arrangement.
- Check terminal integrity and ensure that the assembly matches the required mounting configuration.
3. Electrical inspection
- Perform appropriate continuity and short-circuit checks with the assembly isolated.
- Verify terminal assignments against the approved drawings.
- Confirm that the intended load type and external supply arrangement are within the documented limits.
- Do not apply test voltages that could damage connected electronic equipment.
4. Functional verification
- Where a compatible test setup is available, verify the applicable input and output paths.
- Test switching behavior with a suitable test load and documented conditions.
- Record the results and any untested functions; do not claim full-load or live-system testing unless it was actually performed.
5. Packaging and dispatch
- Protect terminals and connectors against impact and contamination.
- Use appropriate ESD precautions where required by the connected electronics.
- Document the actual product condition, test status, and warranty terms.
Technical FAQ
Q1. Is the FOXBORO P0916AW an eight-channel digital I/O module?
Not by itself. The P0916AW is the field terminal assembly associated with the FBM241c, which provides eight digital inputs and eight switching outputs. The termination assembly provides the physical field wiring interface.
Q2. Can I replace P0916AW with P0916AX?
Not automatically. Both are associated with FBM241c applications, but P0916AW uses compression terminals and P0916AX uses ring-lug terminals. Verify the wiring, mounting, and termination requirements before substituting one for the other.
Q3. Can the outputs switch 240 VAC at 5 A?
The documented FBM241c/P0916AW application includes a 240 VAC, 5 A switching rating under the specified external-source configuration. Confirm the exact circuit arrangement, load type, protective requirements, and applicable installation documentation before using that rating.
Q4. Does the P0916AW require a firmware update or retain configuration after power loss?
No independent firmware or application-configuration retention function is established for this termination assembly. Firmware and control configuration belong to the associated electronic control-system hardware.
Q5. Can I replace P0916AW while the process is running?
Do not assume live replacement is permitted. Disconnecting the assembly may interrupt digital inputs and outputs, including equipment commands. Follow the site’s approved isolation procedure and assess the process consequences before removing the assembly.
