I/O list
Points, signal types, and field devices. We size the I/O with spare capacity and pick the modules.
Engineered panels
From an I/O list to an approved drawing set.
When you need the panel designed as well as built, we produce schematics, panel layout, BOM, and SCCR calculation in 2D AutoCAD for your approval, then build and test it.
Inputs
What we can start from
Most engineered panels start from less than a full spec. These are enough to begin.
Load list
Motors, heaters, and other loads with ratings, so we can size branch protection, contactors, drives, and the main disconnect.
Sequence or narrative
A description of what the machine or system does, so control circuits and safety functions are drawn correctly.
Marked-up sketch
A hand sketch or an old drawing with changes is a perfectly good starting point.
Site or project spec
The site’s electrical specification, preferred brands, and labeling rules.
Site conditions
Supply voltage, available fault current, ambient temperature, and environment for the enclosure rating and cooling.
Deliverables
The drawing set you approve
Drawn in 2D AutoCAD. Conveyor companies that sell the panel under their name can have their own title block. You approve the set before material is ordered.
Schematics
Power distribution, control circuits, PLC I/O, safety circuits, and network, with cross-references and wire numbers.
Panel layout
Backplate and door layouts at scale, with duct, terminal strips, clearances, and enclosure cutouts.
BOM
Every part with manufacturer and part number, including terminals, duct, labels, and hardware.
SCCR calculation
Per UL 508A Supplement SB, with the limiting component identified.
Heat load
Heat dissipation estimate and the cooling choice that follows from it: vents, fans, or an air conditioner.
Brand-flexible BOMs
Allen-Bradley options alongside alternates
Many warehouses and plants standardize on Allen-Bradley. Others leave it open, or the AB part is on a long lead time. We price the BOM so you can choose line by line.
Base and alternate
For key items such as the PLC, I/O, power supplies, disconnect, motor protection, and terminals, the BOM can show an Allen-Bradley option next to an alternate.
What changes
Each alternate notes what changes with it: footprint, SCCR, wiring, lead time, and any configuration or software impact.
Mixed packages
Keep AB where the site standard or the PLC platform requires it, and use alternates elsewhere to cut cost or lead time.
Would you like to know more? How we keep a mixed BOM safe
SCCR is rechecked
Changing a breaker, fuse holder, or motor starter can change the panel SCCR. Every alternate is checked against the SCCR calculation before it’s offered.
Safety parts are matched
Safety relays, contactors used in safety circuits, and E-stop devices are only swapped when the alternate has the safety data needed for the PL or SIL calculation.
One BOM revision
The approved choice is the BOM revision we build to. No partial updates.
Design rules
How we draw panels
Spare capacity
Spare I/O, spare terminals, and space on the backplate for changes that always come late.
Separate control power
Field device power fused separately from the PLC, so a shorted sensor doesn’t drop the controller.
Serviceable layout
High-voltage and low-voltage sections separated, drives placed for airflow, and terminals reachable without removing components.
Readable drawings
Consistent device tags and cross-references, so an electrician can trace a circuit without calling anyone.
Next step
Need a panel designed and built?
Send the I/O list, load list, or a sketch. We’ll come back with questions and a price for drawings plus build.
[email protected]
Mon–Fri, 9:00 AM – 4:00 PM ET · we reply within one business day
Engineering offices in Clearwater, Florida · available for Zoom meetings
Request received
Thanks. An engineer will follow up within one business day. Anything to add? Email [email protected].