Box Build Assembly & System Integration
Define the finished unit—not only the circuit board.
Box build assembly integrates PCBAs with mechanical parts, wiring and product configuration. RAYPCB accepts system-integration enquiries covering product assembly, cable assembly and agreed testing. Define whether the deliverable is an open subassembly, a closed enclosure or a packaged configured unit.
PCBA is one part of the finished product
Separate board completion from product completion
A populated, tested PCB can still require a harness, panel connectors, firmware, mechanical fixing and an end-of-line test before it becomes a product. Decide which of those operations belongs in this order. Do not use a PCBA-only price as a complete-product budget.
| PCBA | Board build, inspection and agreed board-level test |
|---|---|
| Mechanical | Enclosure, mounting hardware, drawings and assembly sequence |
| Interconnection | Harness drawings, connector keys, pinouts and routing |
| Configuration | Firmware release, options, serial identity, labels and accessories |
What a usable box-build package contains
A mechanical model helps explain fit but does not replace toleranced drawings, an assembly BOM or a wiring definition. Identify who supplies each part and whether procurement, machining or tooling is included. For mating items, include the actual interface requirements and revision.
| Mechanical definition | Exploded assembly drawing, enclosure revision, fastener and torque requirements |
|---|---|
| Electrical definition | Harness / wiring drawing, pin-to-pin connections and grounding instructions |
| Configuration definition | Firmware file identity, programming process and variant matrix |
| Release definition | Test procedure, limits, required records, labeling and pack-out instructions |
For the interconnect package, define harness branches, terminations and acceptance records, or use the cable construction and end-interface guide when a specific cable is the main deliverable. Keep those definitions consistent with the enclosure installation drawing.
Check the board retention interface
If the enclosure uses clips or snap supports, compare the finished hole and thickness ranges with the hardware drawing using the PCB mounting clip fit guide. Keep installation access and product qualification separate from a dimensional fit check.
Integration example: a PCBA can pass its board-level check yet leave a connector inaccessible after the enclosure is closed. Review the installed state before treating a board test as finished-product acceptance.
- Retention: identify the hardware part number, mounting-hole definition, board thickness and support locations on the controlled drawing.
- Access: show how the mating connector, harness and any required service tool reach the installed board. Include the assembly sequence when a later step blocks access.
- Acceptance: specify which finished-unit connections or functions must be checked after closure and what result should be recorded.
Send the marked interface drawing and unresolved items with the scope request. Torque, clearance and retention requirements must come from the approved design and hardware data; a generic enclosure model cannot supply those limits. The Altium overview of box-build documentation explains why the PCB release alone does not define the complete product.
Build your integration scope
Optional planning aid. You can request a file-based quote directly without completing this tool.
Build your integration scope
The planner needs JavaScript. The process tables on this page remain available. Send the listed parameters through Contact for engineering review.
Board test and system test answer different questions
Review the board-level assembly and test stages before defining system tests.
A board may pass its assembly checks while a miswired cable, incorrect firmware or an enclosure interface prevents the finished unit from working. Define the system test with operating conditions and objective pass/fail criteria. Applicable safety or regulatory qualification must be specified separately; box assembly alone does not certify the product.
| Continuity / wiring | Verify the specified interconnection; does not establish all product functions |
|---|---|
| Functional test | Exercise defined inputs and outputs at specified conditions |
| Configuration check | Verify firmware identity, options and serial / label consistency |
| Final release | Confirm accessories, physical assembly, records and packaging |
When integration continues across repeated releases, agree sourcing, test responsibility and change control within the contract manufacturing program.
Illustrative integration boundary: an industrial controller
Consider a hypothetical controller with one PCBA, a sheet-metal enclosure and two cable assemblies. A useful RFQ defines who supplies the cables, how the shield terminates, which firmware is loaded and how the unit is tested after closure. This example illustrates scope definition; it is not a documented customer delivery.
| Avoid a hidden cost | Quote enclosure tooling and test fixtures separately when needed |
|---|---|
| Avoid an ambiguous handoff | Name the owner of the system-level acceptance procedure |
| Avoid a configuration error | Tie the label / serial record to the released firmware variant |
Prepare a reviewable enquiry
Send the current revision, quantity and the requirements that matter to your build. If something is preliminary, identify it. Exact price, schedule and acceptance scope are confirmed through the project review.
Download the editable CSV worksheet · Opens in Excel or another spreadsheet editor. No sign-in required.
Review quality and supplier-evidence requirements; check the assembly capability review. Equipment photographs illustrate the process; they do not replace a job-specific acceptance record.
Get a quoteCommon questions
Can I supply the PCBAs and enclosure?
Describe which parts you will supply and send the integration drawings. Incoming inspection, shortages and responsibility for supplied materials should be agreed in the quotation.
Does a box build include cable harnesses?
It can be part of the requested scope. Supply pinouts, connector part numbers, lengths and routing requirements; inclusion must be confirmed.
Does enclosure assembly make my product UL certified?
No. Product approval depends on the applicable requirements and certification scope. State the intended compliance requirements before quoting.
Can I start without a final mechanical drawing?
You can request a scope discussion with preliminary information. A firm production release still needs agreed drawings, parts and acceptance criteria.
Continue with the part of the build you need
PCB Assembly service overview · Discuss your files with RAYPCB
Technical reference: IPC explains assembly process and acceptance standards. Specify the applicable revision and class for the order; this reference is not a certification claim.