Process Control Panels
Process Control Panels
Custom process control panels for food processing, water treatment, heating, pumps, PLC, HMI, VFD, and industrial automation. Built to your process sequence, instruments, enclosure, and documentation needs.
Specifications
- Application
- Custom Industrial Automation
- Control Method
- PLC / Relay Based
- Voltage
- 220V / 380V / 480V Available
- Protection Rating
- IP54 / IP65 Optional
- CCommunication Protocol
- Modbus / Profinet / Ethernet/IP
- Testing
- FAT Before Shipment
- Customization
- Available

Custom Process Control Panels for Food Processing, Water Treatment, Heating, Pumping, and Industrial Automation
Uniregal supplies custom process control panels for industrial processes that need stable control of temperature, pressure, flow, level, pH, pumps, valves, heaters, mixers, dosing systems, and production equipment.
Each panel can be designed according to your process sequence, field instruments, control loops, PLC/HMI requirement, motor load, communication method, enclosure environment, component preference, and project documentation needs.
For buyers, a process control panel is not only an electrical cabinet. It is the part of the system that helps operators keep the process stable, visible, repeatable, and easier to troubleshoot during daily operation.
Quick Answer
A process control panel is an electrical control panel used to monitor and control industrial process variables such as temperature, pressure, flow, level, pH, conductivity, speed, and equipment status.
It may include PLCs, HMIs, PID controllers, VFDs, relays, contactors, power supplies, circuit protection, terminals, communication modules, and field instrument connections.
The main purpose is to help the process run within the required operating range, respond to sensor feedback, control equipment automatically, display alarms, and give operators a clear interface for monitoring and adjustment.
What a Process Control Panel Usually Controls
Process Variable or Function | Typical Devices |
|---|---|
Temperature | RTD, thermocouple, heater, cooling valve, PID controller |
Pressure | Pressure transmitter, pressure switch, pump, valve, alarm output |
Flow | Flow meter, control valve, VFD pump, dosing pump |
Level | Level sensor, float switch, pump, valve, overflow alarm |
pH / Conductivity | Analyzer, dosing pump, chemical feed system |
Motor Speed | VFD, motor starter, encoder feedback |
Equipment Status | Run signal, fault signal, manual/auto mode, alarm feedback |
Process Sequence | PLC logic, timers, interlocks, recipe or batch steps |
Operator Control | HMI, push buttons, selector switches, local/remote control |
Data and Communication | Modbus, Ethernet, hardwired I/O, SCADA, or plant system integration |
Typical Applications
Application | Control Scope |
|---|---|
Food Processing | Mixing, heating, cooling, filling, conveying, cleaning sequence, alarms |
Water Treatment | Pumps, valves, dosing, filtration, RO systems, tank levels, pH control |
Wastewater Treatment | Aeration, dosing, sludge pumps, level control, process alarms |
Process Heating | Heaters, temperature controllers, SSRs, high-limit protection |
Chemical Dosing | pH adjustment, coagulation, disinfection, flow-paced dosing |
Pump Skids | Duty/standby pumps, pressure control, level control, VFD operation |
Industrial Mixing | Mixer control, batch sequence, motor protection, operator interface |
Tank Systems | Level monitoring, filling, draining, heating, overflow protection |
Packaging and Production Lines | Temperature, speed, conveyor, sensor, alarm, and sequence control |
OEM Process Equipment | Build-to-print or custom panels for equipment manufacturers |
Food Processing Control Panels
Food processing control panels often need more than basic machine start and stop.
They may need to manage heating, cooling, mixing, conveying, filling, cleaning, batch sequence, alarms, and operator visibility. In some projects, the panel also needs to support traceability, real-time status display, and easier cleaning or maintenance.
For food processing equipment, the control panel should be reviewed according to:
Design Point | Why It Matters |
|---|---|
Process Sequence | Mixing, heating, cooling, filling, washing, or transfer steps must be clear |
Temperature Control | Product quality and safety may depend on stable temperature |
Motor and VFD Control | Mixers, pumps, conveyors, and fans may need different speed controls. |
HMI Operation | Operators need clear screens, alarms, setpoints, and manual controls |
Enclosure Environment | Washdown, humidity, dust, or food production conditions may affect cabinet choice |
Documentation | Wiring diagrams, I/O lists, and labels help installation and maintenance teams |
Process Heat Control Panels
Process heat control panels are used when the process requires stable heating or temperature regulation.
Typical applications include tank heating, industrial heaters, ovens, packaging equipment, plastics machinery, chemical systems, and process lines where temperature must stay within a defined range.
A process heat control panel may include the following:
Component | Function |
|---|---|
Temperature Controller / PID Controller | Maintains target temperature based on sensor feedback |
Thermocouple / RTD Input | Measures process temperature |
SSR / Contactor | Switches heating load |
High-Limit Controller | Protects against over-temperature conditions |
Main Disconnect | Provides safe isolation for maintenance |
Circuit Protection | Protects heater circuits and control circuits |
Alarm Output | Sends warning when temperature exceeds set limits |
HMI | Displays temperature, setpoint, alarm, and operating status |
PLC and HMI Panels for Process Control
Many process control panels use PLC and HMI together.
The PLC reads signals from sensors and instruments, processes the control logic, and sends commands to pumps, valves, VFDs, heaters, relays, and alarms. The HMI gives operators a clear view of the process, including setpoints, trends, alarms, equipment status, and manual controls.
Function | PLC Role | HMI Role |
|---|---|---|
Temperature Control | Executes logic or PID control | Displays value, setpoint, and alarm |
Pump Control | Starts, stops, alternates, or interlocks pumps | Shows pump status and allows manual/auto control |
Valve Control | Opens or closes valves based on conditions | Shows valve position or command status |
Alarm Handling | Detects abnormal signals | Displays alarm messages for operators |
Batch Sequence | Runs timed or conditional steps | Shows current step and operator prompts |
Data Visibility | Processes field inputs | Presents status, trends, and settings |
Main Components
Component | Function |
|---|---|
Main Disconnect | Isolates incoming power for maintenance |
Circuit Breakers / Fuses | Protects power and control circuits |
Contactors | Starts and stops motors, heaters, or electrical loads |
Overload Relays | Protects motors from overload |
PLC | Executes process logic, interlocks, alarms, and I/O control |
HMI | Displays process status, alarms, setpoints, and operating modes |
PID Controller | Controls temperature, pressure, flow, or other process variables |
VFD | Controls pump, fan, conveyor, or mixer speed |
Power Supply | Provides control voltage for PLC, instruments, and relays |
Signal Isolators | Helps protect and condition analog signals |
Terminal Blocks | Connects instruments, sensors, valves, motors, and external wiring |
Communication Module | Supports Modbus, Ethernet, SCADA, or plant system communication |
Push Buttons and Switches | Supports local control and manual operation |
Indicator Lights | Shows running, fault, alarm, and power status |
Labels and Nameplates | Supports installation, operation, and maintenance |
Control Panel Design Process
A good process control panel starts with the process requirement, not the enclosure size.
Before design, the process should be reviewed from the field device side, control logic side, operator side, electrical side, and maintenance side.
Design Step | What Should Be Confirmed |
|---|---|
Process Review | What variable needs to be controlled and why |
Instrument Review | Sensors, transmitters, switches, analyzers, and signal types |
Load Review | Pumps, valves, heaters, mixers, motors, and power requirements |
Control Sequence | Manual/auto mode, interlocks, alarms, startup and shutdown logic |
I/O List | Digital inputs, digital outputs, analog inputs, analog outputs |
HMI Requirement | Screens, setpoints, alarms, manual controls, data display |
Communication | Modbus, Ethernet, SCADA, hardwired signals, remote monitoring |
Enclosure Requirement | Indoor, outdoor, washdown, dusty, wet, hot, or corrosive area |
Documentation | Electrical schematic, terminal list, BOM, labels, test report |
Control Panel Assembly Process
The assembly process should protect the project from wiring errors, missing components, unclear labels, and commissioning delays.
Assembly Step | What Happens |
|---|---|
Drawing Confirmation | Confirm schematic, layout, I/O list, terminal list, and BOM |
Component Preparation | Check model, brand, rating, quantity, and substitutes if needed |
Enclosure Preparation | Mounting plate layout, cutouts, drilling, cable entry planning |
Component Installation | Install breakers, PLC, HMI, VFD, relays, terminals, and power supplies |
Wiring | Complete power wiring, control wiring, signal wiring, and grounding |
Labeling | Apply wire labels, terminal labels, device labels, and nameplates |
Internal Inspection | Check wiring route, terminal tightness, component position, and grounding |
Power-On Test | Test control voltage and basic operation when applicable |
I/O and Function Test | Check signals, alarms, interlocks, and control logic according to scope |
Packing | Protect the panel for export delivery and site handling |
What Should Be Confirmed Before Ordering?
Information Needed | Example |
|---|---|
Process Type | Food processing, water treatment, heating, dosing, pumping, mixing |
Process Variables | Temperature, pressure, flow, level, pH, conductivity |
Power Supply | 220V, 380V, 400V, 415V, 480V, 600V |
Load List | Pumps, heaters, mixers, valves, conveyors, fans |
Instrument List | RTD, thermocouple, pressure transmitter, flow meter, level sensor |
Signal Type | 4-20mA, 0-10V, dry contact, RTD, thermocouple, pulse |
Control Sequence | Startup, shutdown, manual/auto, interlocks, alarms, duty/standby |
PLC / HMI Requirement | Preferred brand, I/O quantity, screen functions, alarm display |
VFD Requirement | Motor speed control, flow control, pressure control, energy saving |
Communication | Modbus, Ethernet, SCADA, remote I/O, hardwired signals |
Enclosure Environment | Indoor, outdoor, washdown, dusty, wet, hot, corrosive |
Documentation | Schematic, wiring diagram, I/O list, terminal list, BOM, test report |
Component Brand | Siemens, Schneider, ABB, Omron, Mitsubishi, Allen-Bradley, Delta |
Build-to-Print or Custom Design
Uniregal can support both build-to-print and custom design process control panel projects.
For build-to-print projects, the buyer provides approved drawings, BOM, layout, I/O list, terminal list, and component requirements. We build according to the confirmed documents.
For custom design projects, the buyer provides the process description, equipment list, control sequence, field instrument list, enclosure requirement, and preferred components. We help organize the control panel configuration before production.
Project Type | Suitable For |
|---|---|
Build-to-Print | OEMs, system integrators, repeat projects, approved drawings |
Custom Design | New processes, incomplete drawings, special requirements |
Retrofit Review | Old process panels, obsolete PLCs, unclear wiring, damaged components |
Design Optimization | Projects needing better layout, clearer labels, easier maintenance |
Engineering Documents
Available documents may include:
- General arrangement drawing
- Electrical schematic
- Wiring diagram
- I/O list
- Terminal list
- Bill of materials
- Instrument signal list
- PLC hardware configuration
- HMI screen list if required
- Alarm list if required
- Nameplate and label list
- Test report
- Packing list
- Compliance-related documents if required
Panel Testing Before Shipment
Each process control panel can be inspected according to the confirmed drawings and project requirements.
Typical inspection items include the following:
- Component model verification
- Mechanical assembly inspection
- Wiring continuity check
- Terminal and label inspection
- Grounding check
- Control voltage check
- Analog signal wiring check when applicable
- PLC I/O check when applicable
- HMI screen check when applicable
- VFD parameter and basic function check when applicable
- Alarm and interlock check according to agreed logic
- Temperature or process loop simulation when applicable
- Visual inspection before packing
The purpose of testing is not only to confirm that the panel powers on. It is to reduce signal errors, wrong terminal wiring, unclear labels, missing components, and startup problems before the panel reaches the site.
Process Control Panels for Retrofit Projects
Many process control panel inquiries come from existing systems that are still running but difficult to maintain.
The old panel may have discontinued PLCs, unclear drawings, damaged relays, outdated HMI screens, unstable temperature control, poor signal labeling, or components that are hard to replace locally.
For retrofit projects, you can send old panel photos, component lists, instrument lists, nameplate information, wiring drawings, and a description of the process operation. We can review the available information and suggest a practical replacement or upgrade configuration.
Cost Factors
Process control panel cost depends on more than cabinet size.
The final price is affected by PLC and HMI brand, I/O quantity, analog signal quantity, VFD requirements, instrument wiring, enclosure material, component brands, testing scope, documentation, compliance requirements, and delivery urgency.
A lower panel price may not be the lowest project cost if the wiring is unclear, signals are not defined, drawings are missing, or the panel requires modification during commissioning.
Lead Time
Lead time depends on drawing readiness, component availability, panel complexity, enclosure type, I/O quantity, testing requirements, documentation scope, and project urgency.
For urgent replacement projects, we can first review the critical components and propose a realistic delivery schedule before full production confirmation.
FAQ
What are process control panels?
Process control panels are electrical control panels used to monitor and control industrial process variables such as temperature, pressure, flow, level, pH, conductivity, speed, and equipment status. They are commonly used in food processing, water treatment, heating, dosing, pumping, and industrial automation systems.
What is the difference between a process control panel and a normal control panel?
A normal control panel may only start and stop equipment. A process control panel usually receives sensor feedback, controls process variables, runs PLC logic, displays HMI information, manages alarms, and helps keep the process stable within a required operating range.
What industries use process control panels?
Process control panels are used in food and beverage, water treatment, wastewater treatment, chemical dosing, process heating, packaging, manufacturing, tank systems, pump skids, and OEM process equipment.
What variables can a process control panel control?
Common variables include temperature, pressure, flow, level, pH, conductivity, speed, and equipment status. The panel can receive signals from field instruments and control pumps, valves, heaters, mixers, VFDs, and alarms.
Can you build food processing control panels?
Yes. Food processing control panels can be built for mixing, heating, cooling, conveying, filling, cleaning sequence, alarms, and operator control. Enclosure and component selection should consider the production environment and maintenance requirements.
Can you build process heat control panels?
Yes. Process heat control panels can be built for industrial heaters, tanks, ovens, packaging equipment, plastics machinery, and other temperature control applications. They may include PID controllers, SSRs, contactors, high-limit protection, and temperature sensor inputs.
Can you build PLC and HMI panels for process control?
Yes. PLC and HMI panels can be built for process automation projects requiring I/O control, setpoint adjustment, alarm display, manual/auto control, batch sequence, and real-time process visibility.
What information is needed for a quotation?
Please send the process type, power supply, load list, instrument list, signal type, control sequence, PLC/HMI requirement, VFD requirement, enclosure environment, communication requirement, and available drawings or photos.
Can you build panels from my drawings?
Yes. We can support build-to-print projects if you provide approved electrical drawings, a BOM, layout, I/O list, terminal list, and component requirements.
Can you help if I do not have complete drawings?
Yes. You can send process descriptions, old panel photos, component lists, instrument lists, nameplate information, and videos or notes showing how the process operates. We can review the available information and help organize the panel requirement.
Do you provide process control panel wiring diagrams?
Yes. Wiring diagrams can be provided according to the confirmed order scope. For custom projects, drawings should be reviewed before production to confirm power wiring, control wiring, signal wiring, terminals, and field connections.
Can the panel communicate with SCADA or other systems?
Yes. Depending on the project, the panel can support communication through Modbus, Ethernet, hardwired I/O, remote I/O, or other project-specific communication methods.
How do you test process control panels before shipment?
Testing may include component verification, wiring continuity check, terminal inspection, grounding check, control voltage check, PLC I/O check, HMI check, VFD basic function check, alarm check, interlock check, analog signal wiring check, and loop simulation when applicable.
Can you replace an old process control panel?
Yes. For replacement projects, please send old panel photos, wiring drawings if available, component models, voltage information, an instrument list, and a description of how the process operates. We can help review whether a replacement panel or upgraded design is more practical.
Request a Quotation
Send us your process description, load list, instrument list, control sequence, voltage, enclosure requirement, PLC/HMI preference, and available drawings or photos.
Our team will review the process control panel configuration before quotation, so you receive a practical proposal based on the real process requirement, not only a cabinet price.
Start Your Process Automation Project
Looking for a reliable process control panel supplier for your industrial automation project?
Contact UniRegal Automation today.
- Email: info@uniregal.com
- Website: https://www.uniregal.com