Editorial Technical Reference

Control Panel (PLC/HMI)

This page explains how Control Panel (PLC/HMI) is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Integrated control interface for monitoring and operating the depyrogenation tunnel's heating, conveyor, and sterilization processes.

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Control Panel (PLC/HMI) in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Control Panel (PLC/HMI)

Definition
This control panel is a specialized component designed for depyrogenation tunnels used in pharmaceutical and related industries. It houses the Programmable Logic Controller (PLC) and Human-Machine Interface (HMI) in a single enclosure, serving as the central command unit for the tunnel's operation. The panel enables operators to set temperature profiles for different zones, control conveyor belt speed, monitor real-time process parameters such as temperature, pressure, and air flow, manage alarms, and log batch data. Its primary function is to ensure the tunnel effectively removes pyrogens (endotoxins) from glassware or components through dry heat sterilization. The panel is constructed with a powder-coated steel enclosure, a polycarbonate HMI touchscreen, copper electrical components, and FR-4 printed circuit boards for the PLC. It operates on a single-phase power supply of 220–240 V AC (50/60 Hz) and consumes between 150 and 300 W depending on HMI size and backlight. The operating temperature range is 0–50 °C, with storage from -20 to 60 °C, and relative humidity of 10–90% non-condensing. The enclosure offers ingress protection ratings from IP54 to IP65. The HMI features a TFT color display ranging from 7 to 15 inches with resolutions from 800×480 to 1920×1080 pixels. The PLC provides 16–64 digital inputs and outputs (24 V DC, sink/source), 4–16 analog inputs, and 2–8 analog outputs (0–10 V or 4–20 mA). Communication interfaces include Ethernet, RS-232, and RS-485 for SCADA and remote I/O. Panel dimensions vary from 300×200×150 mm to 600×400×300 mm. All specifications are reference ranges and must be verified with the legal manufacturer for the specific model and application.
Working Principle
The PLC executes a pre-programmed sequence based on operator inputs from the HMI. It receives signals from temperature sensors, pressure sensors, and motor encoders throughout the tunnel. The PLC processes this data, compares it to setpoints, and outputs control signals to adjust heating elements, blower motors, and the conveyor drive to maintain the required depyrogenation cycle, typically involving heating, holding at high temperature (~250°C), and cooling phases. The HMI provides visualization of the process, touch-screen controls, and data logging.
Common Materials
Powder-coated steel enclosure, Polycarbonate HMI touchscreen, Copper electrical components, FR-4 PCB (for PLC)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage220–240 V ACSingle phase, 50/60 HzIEC 60204-1
Power Consumption150–300 WDepends on HMI size and backlight
Operating Temperature0–50 °CFor PLC and HMI componentsIEC 61131-2
Storage Temperature-20–60 °CNon-operating conditionIEC 61131-2
Relative Humidity10–90 %Non-condensingIEC 61131-2
Ingress ProtectionIP54–IP65For panel front and enclosureIEC 60529
HMI Screen Size7–15 inchTFT color display
HMI Resolution800×480–1920×1080 pixelsDepends on screen size
PLC Digital Inputs16–6424 V DC, sink/sourceIEC 61131-2
PLC Digital Outputs16–64Relay or transistorIEC 61131-2
Analog Inputs4–160–10 V or 4–20 mAIEC 61131-2
Analog Outputs2–80–10 V or 4–20 mAIEC 61131-2
Communication InterfaceEthernet, RS-232, RS-485For SCADA and remote I/OIEC 61158
Panel Dimensions (W×H×D)300×200×150–600×400×300 mmVaries with configuration

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • PLC Unit
    The central processing unit that executes the control logic, reads inputs from sensors, and sends output commands to actuators (heaters, motors, valves).
    Material: Electronic components on PCB, housed in plastic/metal casing
  • HMI Touchscreen Display
    Provides graphical user interface for operators to monitor process variables, input setpoints, acknowledge alarms, and view historical data.
    Material: Polycarbonate/glass screen, LCD/LED panel
  • Power Supply Unit (PSU)
    Converts incoming AC mains voltage to regulated DC voltages required by the PLC, HMI, and other low-voltage components within the panel.
    Material: Electronic components (transformers, capacitors, ICs) in metal housing
  • Terminal Blocks
    Provide secure connection points for field wiring from tunnel sensors (thermocouples, pressure sensors) and actuators to the PLC's I/O modules.
    Material: Plastic body with metal (copper alloy) conductive parts
  • Circuit Breakers/Disconnect Switch
    Provides overcurrent protection for internal circuits and a means to safely isolate power to the panel for maintenance.
    Material: Thermoplastic casing, metal contacts and springs

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized environment)
other spec: IP65/NEMA 4X rating for washdown environments, 24VDC power supply, 0-100% relative humidity (non-condensing)
temperature: Ambient to 60°C (operating environment), -20°C to 85°C (storage)
Media Compatibility
✓ Clean steam environments ✓ Pharmaceutical-grade air systems ✓ Aqueous cleaning solutions (pH 6-8)
Unsuitable: Corrosive chemical atmospheres (chlorine, strong acids)
Sizing Data Required
  • Required I/O count (digital/analog)
  • HMI screen size and resolution needs
  • Communication protocol requirements (Ethernet/IP, Profinet, etc.)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
PLC processor failure
Cause: Electrical transients from power supply fluctuations or nearby equipment, leading to corrupted memory or logic errors.
HMI touchscreen degradation
Cause: Mechanical wear from repeated use, environmental contaminants (dust, oils), or UV exposure causing calibration drift or unresponsiveness.
Maintenance Indicators
  • Intermittent or complete loss of communication between PLC and HMI, indicated by error codes or blank screens.
  • Unusual audible buzzing or clicking from the control panel, suggesting loose connections, failing relays, or power supply issues.
Engineering Tips
  • Implement a robust power conditioning system (e.g., UPS or surge protectors) and ensure proper grounding to protect against electrical transients.
  • Establish a regular cleaning and inspection schedule for the HMI screen and enclosure seals to prevent environmental ingress and mechanical wear.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 13849-1: Safety of machinery - Safety-related parts of control systems ANSI/UL 508A: Standard for Industrial Control Panels CE Marking (EU Machinery Directive 2006/42/EC)

Quoted from the published standard.

Manufacturing Precision
  • Panel flatness: ≤0.5mm per 1000mm
  • Mounting hole alignment: ±0.2mm
Quality Inspection
  • Dielectric withstand test (HIPOT test)
  • Functional safety verification test
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Control Panel (PLC/HMI)

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Frequently Asked Questions

What is the primary function of this control panel?

It serves as the central command unit for a depyrogenation tunnel, allowing operators to set temperature profiles, control conveyor speed, monitor process parameters, manage alarms, and log batch data to ensure effective removal of pyrogens via dry heat sterilization.

What are the key electrical specifications?

The panel operates on 220–240 V AC single phase (50/60 Hz) and consumes 150–300 W. The PLC provides 16–64 digital I/O, 4–16 analog inputs, and 2–8 analog outputs. Communication interfaces include Ethernet, RS-232, and RS-485.

What environmental conditions can the panel withstand?

The operating temperature range is 0–50 °C, storage from -20 to 60 °C, and relative humidity 10–90% non-condensing. The enclosure offers IP54–IP65 ingress protection.

How should I verify the suitability of this panel for my application?

All specifications are reference ranges. You must confirm model-specific values, standards compliance, and compatibility with your depyrogenation tunnel by consulting the legal manufacturer or supplier.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Depyrogenation Tunnel
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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