High‑performance 4.3″ HMI touch panel for industrial automation – ideal for engineers seeking reliable, crisp displays and seamless PLC integration.
Product Overview
The Samkoon EA-043A is a compact human‑machine interface featuring a 4.3‑inch 16:9 TFT LCD with 480×272 resolution. Brightness of 400 cd/m² and a 400:1 contrast ratio ensure clear visibility in industrial environments. It supports resistive touch input, multiple communication ports (RS232, RS485), and is compatible with common PLC brands for seamless integration. Rugged design meets quality control standards for stability in factories and machinery control panels. Unique selling points include its slim 38 mm depth, wide operating temperature range, and affordable price point relative to competitors.
How to Use
- Mount into a standard 86×86 mm panel cutout, secure with rear clips.
- Connect power (24 V DC) and ground according to wiring diagram.
- Wire RS232 or RS485 port to your PLC’s communication terminals.
- Use Samkoon’s free HMI configuration software to design screens: define buttons, indicators, data registers.
- Download your project via USB or serial link.
- Test operation: press touch areas to send commands and monitor responses.
Tips: calibrate the touch screen once after power‑up. Keep firmware updated for bug fixes. Ensure wiring is shielded to avoid noise on serial lines.
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Frequently Asked Questions (FAQ)
- What power supply does EA‑043A require?
24 V DC, 0.5 A typical. - Which PLCs are supported?
Any with RS232/485 and Modbus protocol: Siemens, Mitsubishi, Delta, etc. - How do I update firmware?
Use Samkoon’s upgrade tool via USB‑to‑serial cable. - What is the operating temperature range?
–10 °C to +60 °C. - Is the screen resistive or capacitive?
Resistive 4‑wire touch panel. - Can I use it outdoors?
Only in sheltered enclosures—no IP rating. - What software is needed?
Samkoon EA‑HMI configuration tool (Windows). - How many points can I display?
Unlimited tags, limited by memory (~128 KB project size). - Does it support alarms or recipes?
Yes—built‑in functions for alarms, data logging, recipe management. - What mounting size is required?
Cutout: 138×86 mm, depth 38 mm.
User Review Summary
Based on eBay and Amazon sellers’ feedback: Pros: clear, responsive display; easy PLC connection; durable build. Cons: documentation only in Chinese/limited English, occasional firmware bugs, slower touch response compared to higher‑end panels.
Comparison with Competing Products
Allen‑Bradley MicroPanel 2711R‑T4T: higher price (~$300), better support/software, but smaller user community.
Weintek cMT‑4451: similar size, better Ethernet support, pricier and slightly bulkier.
Siemens KTP400: superior graphics and IP65 but nearly double cost. Samkoon offers best cost‑performance for basic HMI needs.
Technical Specifications
Display size: 4.3″ TFT LCD (16:9)
Resolution: 480×272 pixels
Brightness: 400 cd/m²; Contrast 400:1
Touch: 4‑wire resistive
Dimensions: 138 × 86 × 38 mm (W × H × D)
Cutout: 132 × 80 mm
Power: 24 V DC, 0.5 A
Communications: RS232, RS485 (Modbus)
Memory: 128 KB project storage
Operating temp: –10 °C to +60 °C
Weight: ~250 g
Brand or Manufacturer Info
Samkoon is a China‑based HMI specialist with over 15 years in industrial interfaces. They focus on affordable, robust touch panels and maintain a global distributor network. Known for responsive custom support and continuous firmware updates.
Purchase Recommendations
Amazon: Calvas EA-043A Samkoon HMI Touch Screen 4.3 inch
Samkoon: https://www.samkoon.store/ea-043a/
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