A control panel quote takes longer than a machined part quote for one simple reason: it is really two quotes stacked together, an electrical one and a mechanical one, and most RFQs only describe one of them. If you want a fast, accurate number from a control panel builder in Tennessee, send both sides of the job up front.
What a Panel Shop Actually Needs to Quote Your Job
At minimum, a panel build quote needs:
- An electrical schematic (PDF is fine to start; a native file speeds up the final build).
- A bill of materials, or at least the major components you want specified — PLC, drives, contactors, disconnects, HMI.
- Enclosure size, type, and mounting (floor-standing, wall-mount, NEMA rating, indoor or outdoor).
- Quantity, and whether this is a one-off, a prototype ahead of a production run, or a repeat build.
- Target delivery date and site location.
If you only have a verbal description of what the panel needs to do, say so. A rough functional description (what it starts, what it monitors, what it has to talk to) is enough to get a budgetary number while the real drawings get finished.
Electrical vs. Mechanical: Two Different Drawing Sets
The electrical schematic tells us what goes in the panel and how it is wired. It does not tell us how big the enclosure needs to be, where it mounts, or what has to clear a door, a conduit run, or an existing piece of equipment. If the panel has to fit a specific footprint or tie into machinery we are also building or retrofitting, send a mechanical drawing or at least photos and dimensions of the install location. Skipping this step is the single biggest cause of a panel that quotes clean and then needs rework on site.
PLC Platform and Programming Scope
Tell us the platform up front if you already have one picked: Allen-Bradley/Rockwell, GE, FANUC, Mitsubishi, or Omron. If you don’t have a preference, say that too — we’ll recommend one based on what the panel has to do and what your maintenance team already supports. Separate out the programming scope clearly:
- Hardware only — you or your own team will write the logic.
- Hardware plus logic — full Rockwell PLC programming to a functional spec you provide.
- Hardware, logic, and integration — the panel is part of a larger robotic cell or machine-tending system and needs to talk to other equipment.
Programming scope changes both price and lead time more than almost anything else in the quote, so get this nailed down before you ask for a number.
Certifications and What They Actually Mean
Buyers frequently ask whether a panel will be "UL listed." We are not a UL 508A shop, so we don’t build to that label — if a UL 508A listing is a hard requirement for your application, tell us up front so we can scope the job accordingly. What we do carry: ITAR registration and an AS9100 Rev D quality system in use, which matters if your panel is headed into an aerospace or defense program. We’re insured, and our engineers and machinists build to the drawing and the functional spec you give us, with full documentation handed back at delivery.
Lead Time Drivers You Can Control
The two things that move a panel build’s lead time the most are component availability and how finished your drawings are at kickoff. Long-lead components — certain drives, specialty breakers, some HMI models — can add weeks on their own, so flag anything you know is scarce when you send the RFQ. On the drawing side, a panel that starts build with a locked schematic moves faster than one where the electrical design is still being finalized alongside the build. If your schedule is tight, tell us the real drop-dead date, not a padded one — it changes how we sequence the work and whether we flag a component risk early enough to do something about it.
FAQ
Do you need the full schematic to give me a number, or can I get a budgetary estimate first?
A rough functional description and a guess at enclosure size is enough for a budgetary range. A firm quote needs the schematic and BOM.
Can you recommend a PLC platform if we haven’t picked one?
Yes. Tell us what the panel has to do and what your team already maintains, and we’ll recommend from Allen-Bradley/Rockwell, GE, FANUC, Mitsubishi, or Omron.
Do you build panels that are part of a robotic cell, not just standalone control?
Yes — this is common work for us. Send the panel scope and the automation scope together so we can quote the integration, not just the box.
What if our drawings include information we’re not allowed to send over a general web upload?
Do not upload ITAR- or EAR-controlled drawings through a general web form. Call or email us directly and we’ll tell you the right way to get the package to us.
Where are you located and what’s your service area?
Middle Tennessee, based in Lascassas. We work with machine shops, panel buyers, and integrators across the region, including Murfreesboro, Nashville, and the broader Middle Tennessee corridor.
Whether it’s a standalone control panel, a Rockwell PLC programming job, or a panel that’s one piece of a larger robotic automation cell, the fastest path to an accurate quote is the same: schematic, BOM, enclosure details, PLC platform (or tell us to pick one), and a real delivery date. Send us the print.
Request a quote at BlackPearlLLC.com | (615) 439-5260