Every production line relies on industrial control panels and industrial power supplies to coordinate motors, sensors, drives and safety circuits. For OEMs and automation integrators, designing those panels is familiar. Building them in volume, however, requires specialised wiring, testing and documentation resources that can be difficult to scale.

TPS works as an EMS partner for automation and power cabinets rather than as a machine builder. Typical customers ask us to:

• Translate an existing control panel design into manufacturable wiring harnesses, assemblies and build instructions.
• Combine PCBA, industrial power supplies and standard automation components into complete control cabinets.
• Deliver tested, labelled, documented cabinets that can be installed directly into their machinery, cells or test rigs.

For system design, PLC programming and safety validation you work with your own engineering teams or system integrators; TPS focuses on repeatable manufacturing and documentation of the hardware.

PLC and control panels

TPS builds PLC control panels and I/O enclosures that combine PLC racks, remote I/O, safety relays, contactors, terminal blocks and industrial power supplies on DIN rails:

• Machine control panels for packaging, material handling, machine tools and process skids.
• Remote I/O panels for distributed field equipment in larger plants.
• Safety I/O panels with emergency-stop circuits, interlocks and guard-locking control.

Drive and motor control cabinets

For drives and motors, we assemble:

• VFD and servo drive cabinets with line reactors, filters and braking resistors.
• Soft-starter panels for pumps, compressors and fans.
• Multi-axis motion control panels with coordinated power distribution and feedback wiring.

Industrial power supply cabinets and DC racks

Many factories use centralised DC buses or industrial power supply cabinets rather than scattered power bricks. TPS manufactures:

• 24 V and 48 V industrial power supplies with redundant modules and ORing for high availability.
• Cabinets that combine AC feeders, DC power distribution, fusing and status monitoring on front-panel HMIs.
• Custom DC racks for test equipment and burn-in systems with programmable outputs and measurement circuits.

Industrial UPS and backup power

When a stable line stop or safe shutdown is essential, TPS integrates:

• Industrial uninterruptible power supply modules with external battery strings for control and safety circuits.
• Automatic transfer switches, bypass arrangements and load-segmentation for critical PLC and HMI supplies.
• Monitoring and alarm interfaces that connect UPS and DC systems to the plant SCADA or DCS.

For more examples of how these building blocks fit together you can also see our electronic manufacturing services and integration solutions pages.

Industrial control panel standards and scope

In North America, UL 508A defines construction and safety requirements for industrial control panels operating at 1000 V or less, including component selection, spacing, short-circuit current rating (SCCR) and marking. Many integrators reference UL 508A not only for certification but also as a design guide for safe panels.

Internationally, IEC 61439 governs low-voltage switchgear and controlgear assemblies such as motor control centres and distribution panels, defining construction requirements, temperature rise limits and verification methods.

TPS does not certify panels itself, but we can build hardware that follows the design rules set by your engineering team, whether you are targeting UL 508A, IEC 61439 or industry-specific guidelines.

Design for manufacturability and serviceability

Based on your schematics and layout drawings, TPS can review industrial control panel design details such as:

• Segregation between power, control and communication wiring to reduce noise and make troubleshooting easier.
• DIN-rail and cable-duct layouts that leave space for future expansion and allow rework without rewiring the whole panel.
• Label and marker schemes for terminals, devices and cables that match your documentation and service manuals.
• Use of modular terminal blocks, pluggable connectors and prefabricated harnesses for faster assembly and field replacement.

Components, wiring practices and safety

In the build process we pay attention to:

• Component selection consistent with your standards for breaking capacity, pollution degree, insulation category and SCCR.
• Conductor sizing and routing based on current, ambient temperature and grouping, with appropriate ferrules and terminations.
• Protective earthing and bonding for doors, DIN rails and enclosures, including dedicated PE bars and bonding braids.
• Clearances and creepage distances between live parts and grounded metal in line with your chosen standard.

For workplace electrical safety, many sites rely on NFPA 70E guidance for safe work practices and arc-flash risk management. TPS supports this by delivering panels with clear labelling, documented fault levels and consistent wiring practices so that your safety and maintenance teams can apply NFPA 70E procedures effectively.

If you want a deeper design guide, your team can reference resources such as the Eaton Control Panel Design Guide – UL 508A or official briefing documents from UL and IEC webstores, then pass the chosen design rules into TPS build packs.

Industrial power supply architectures

We manufacture and integrate industrial power supplies that support different architectures:

• DIN-rail power supplies feeding 24 V and 48 V DC buses for PLCs, I/O and instrumentation.
• Centralised DC power racks that use higher-power supplies with distribution and monitoring boards.
• Redundant power systems combining multiple modules through ORing diodes or MOSFETs for high-availability control systems.

Power supplies for industrial equipment often follow safety standards such as IEC/UL 62368-1 for ICT and control equipment or IEC 61010-1 for measurement and lab devices. TPS sources or builds modules in line with the standards you specify and verifies that cabinet wiring, fusing and earthing match the intended ratings.

Industrial UPS integration and DC backup

For critical automation systems, short power dips can cause lost batches, scrap or unsafe stops. TPS integrates:

• Industrial UPS power supply systems for PLCs, HMIs, industrial PCs and safety controllers.
• Battery strings with fusing, disconnects and monitoring suitable for your runtime and maintenance philosophy.
• DC backup cabinets that feed emergency lighting, communication systems or orderly shutdown systems.

UPS modules and battery systems remain certified products from recognised vendors; TPS focuses on mechanical integration, wiring and testing inside the cabinet so they can be commissioned quickly on-site.

High-mix control cabinet line for an automation OEM

A factory automation OEM offers several machine families, each with different I/O counts, power ratings and options. Building industrial control panels in-house consumes engineering and technician time that could otherwise be used for new projects.

• TPS works with the OEM to standardise a set of panel platforms: PLC panel, drive cabinet and power supply cabinet with common layouts.
• We create build packs, wiring diagrams and test procedures so that variations are captured as options rather than entirely new designs.
• Over time, TPS delivers dozens of panel variants per year, all covered by the same documentation structure and quality records.

The OEM keeps full control over architecture and software while freeing internal resources from day-to-day cabinet production.

Retrofitting power supplies in existing factory lines

A process line built years ago uses ageing linear power supplies and hard-wired controls. The end user wants to improve efficiency and simplify maintenance without redesigning the whole line.

• TPS builds industrial power supply cabinets with modern, efficient switching supplies and updated distribution hardware.
• We design mounting plates and adapter harnesses that fit existing panel spaces and field wiring patterns.
• Panels are functionally tested and shipped with clear cross-references so maintenance staff can replace them during planned shutdowns.

By combining new power electronics with compatible mechanics and wiring, the plant extends the life of the line without major civil work.