Beijer E30004380

Description

Technical Specifications

1. Display & Touch Core Parameters

• Display Type: TFT Color LCD Screen
• Standard Resolution: 800 × 480 WVGA
• Display Diagonal Size: 7-inch industrial grade
• Touch Technology: Analog Resistive 4-wire touch panel
• Touch Operating Pressure: 20–150 g trigger force
• Backlight Source: Cold Cathode Fluorescent Lamp (CCFL)
• Rated Backlight Service Life: 50,000 hours at 25°C ambient
• Display Brightness: 400 cd/m² fixed factory calibration

2. Electrical Interface Parameters

• Internal Operating Voltage: 24 V DC ±10% input power from main HMI motherboard
• Touch Signal Interface: 4-channel analog resistive analog signal connector
• LCD Data Communication: LVDS low-voltage differential display bus
• Backlight Drive Rated Current: 0.35 A

3. Environmental & Mechanical Ratings

• Operating Ambient Temperature: 0°C to +50°C
• Storage Temperature: -20°C to +70°C
• Relative Humidity: 10–90% non-condensing
• Vibration Resistance: IEC 60068-2-6, 10–150 Hz 3 g continuous vibration
• Front Panel Protection Grade (when assembled): IP65

4. Mechanical Dimension

• Overall Assembly Outline: 180 mm × 110 mm × 12 mm
• Mounting Cutout Matching: Standard E300 series 7-inch cabinet cutout dimension

Material Composition

• LCD Substrate Glass: High-temperature alkali-free industrial glass
• Resistive Touch Layer: PET flexible conductive film with ITO transparent conductive coating
• Backlight Light Guide Plate: PMMA optical grade acrylic
• Internal Wiring Harness: Shielded twisted pair copper wire with PVC flame retardant insulation
• Assembly Frame: Reinforced black ABS flame retardant plastic frame
• Surface Protective Cover Glass: Anti-scratch tempered soda-lime glass

Structural Features

• All-in-one integrated assembly: LCD screen + touch panel + backlight circuit + wiring harness pre-assembled as single spare part
• Locking push-in LVDS connector for motherboard signal connection, zero soldering required during replacement
• Uniform silicone foam sealing gasket pre-installed around frame edge for IP65 dust/water sealing after cabinet assembly
• Double-sided adhesive anti-vibration buffer between touch panel and LCD glass to eliminate vibration-induced touch misrecognition
• Pre-routed fixed-length internal wiring harness with dedicated pin definition matching E300 motherboard socket
• Modular split design separates display core from main control logic board, reduces replacement maintenance cost

Working Principle

1. 24 V DC power supply from HMI mainboard energizes CCFL backlight drive circuit to provide uniform background illumination for TFT LCD;
2. Mainboard transmits graphical interface data via LVDS differential bus to drive LCD pixel matrix to display text, alarm, equipment status and parameter setting screens;
3. Four-wire resistive touch panel forms X/Y axis coordinate resistance network; finger touch pressure creates contact between upper and lower conductive layers, generates analog coordinate voltage signal transmitted back to mainboard touch processing chip;
4. Mainboard converts touch coordinate signal into button trigger command to execute HMI operation logic, switch pages or adjust equipment setpoints.

Function Features

• Complete visual display and touch input core module for E300 HMI equipment
• Compatible with all original E300 firmware, no program re-download needed after assembly replacement
• Anti-glare tempered front glass reduces industrial workshop light reflection interference
• Wide temperature backlight circuit maintains stable brightness within full rated operating temperature range
• Integrated EMC filtering on internal wiring harness to resist factory frequency converter electromagnetic interference
• Standardized pluggable connector realizes fast field maintenance without professional soldering tools

Performance Advantages

1. Pre-assembled integrated spare part cuts on-site HMI repair time by 70% compared to separate screen/touch component replacement;
2. 400 cd/m² high brightness LCD ensures clear readability under strong factory workshop lighting;
3. Resistive touch panel supports operation with gloves, thick work gloves do not affect touch recognition;
4. Pre-installed sealing gasket eliminates manual gasket cutting during replacement, guarantees IP65 front panel protection;
5. Industrial-grade CCFL backlight with 50,000-hour service life reduces long-term screen flicker and dimming failure;
6. Strict factory coordinate calibration ensures touch positioning accuracy ±0.5 mm full screen without offset drift.

Applicable Industries

Packaging automation lines, food processing machinery, metal forming machine tools, textile production equipment, water treatment control panels, logistics conveyor control stations, plastic injection molding auxiliary equipment, building material processing automation.

Installation Requirements

1. Power supply must be fully disconnected and HMI mainboard capacitor fully discharged before disassembling old screen assembly;
2. All contact surfaces of LCD and touch panel must remain free of fingerprint, oil stain and dust during assembly; lint-free microfiber cloth only for cleaning;
3. LVDS connector pins aligned straight during insertion, no lateral force applied to avoid pin bending and open circuit;
4. Silicone sealing gasket fully embedded into cabinet cutout groove without extrusion deformation to maintain IP65 waterproof performance;
5. Wiring harness routed without sharp bending (minimum bending radius ≥10 mm) to prevent internal wire copper core fracture;
6. After assembly, perform full-screen touch calibration via HMI built-in calibration program before putting equipment into production.

Usage Precautions

• Forbid touching internal LCD glass surface with bare hands; oil residue causes permanent display spot defects;
• Do not apply sharp hard objects (screwdrivers, metal tools) to touch panel surface; scratch damages conductive ITO layer and invalidates touch function;
• Continuous operation above +50°C ambient temperature accelerates CCFL backlight aging and shortens service life;
• Do not extend or splice internal factory wiring harness; unshielded spliced wiring generates electromagnetic signal interference;
• Avoid chemical solvent (thinner, alcohol with concentration >75%) wiping front glass; solvent erodes anti-glare coating;
• Do not store disassembled screen assembly in high humidity environment; moisture causes internal LCD circuit short circuit.