Optrex DMC-40457-NY-LY-B-CKN | High-Reliability 4x40 Character LCD for Industrial Controls
The Optrex DMC-40457-NY-LY-B-CKN is an industry-proven character Liquid Crystal Display (LCD) module engineered for applications demanding unambiguous data presentation and long-term operational reliability. Designed for clarity and easy integration, this module provides a robust human-machine interface (HMI) solution where numerical data, system status, and diagnostic messages are paramount.
Product Highlights at a Glance
This module is not just a display; it's a foundational component for building dependable industrial equipment. Its design philosophy prioritizes clarity, durability, and simplified implementation.
- Expansive 40x4 Character Format: Displays up to 160 characters simultaneously, ideal for presenting complex menus, multiple process parameters, or detailed diagnostic feedback without scrolling.
- Superior Readability: Utilizes FSTN (Film-compensated Super-twisted Nematic) positive mode technology, delivering a sharp black-on-yellow/green display with a high contrast ratio and wide viewing angles.
- Integrated LED Backlight: A long-life yellow/green LED backlight ensures excellent visibility across a range of ambient lighting conditions, from dimly lit control rooms to factory floors.
- Wide Operating Temperature: With a range of -20°C to +70°C, the DMC-40457-NY-LY-B-CKN is built to perform reliably in harsh industrial and outdoor-adjacent environments.
- Simplified Integration: Features an onboard Sitronix ST7066U controller, which is compatible with the industry-standard Hitachi HD44780 command set, drastically reducing firmware development time.
Key Technical Specifications
For engineers requiring precise data for system design, the following table summarizes the core performance metrics of the DMC-40457-NY-LY-B-CKN. For exhaustive electrical and timing characteristics, download the official datasheet.
| Parameter | Specification |
|---|---|
| Display Format | 40 Characters x 4 Lines |
| LCD Technology | FSTN (Film-compensated STN), Positive Transflective |
| Controller IC | Sitronix ST7066U (HD44780 Compatible) |
| Viewing Area | 154.4mm (W) x 29.4mm (H) |
| Character Size | 2.95mm (W) x 4.75mm (H) |
| Backlight Type | LED (Yellow-Green) |
| Operating Temperature Range | -20°C to +70°C |
| Supply Voltage (Logic) | 5.0V DC |
Application Scenarios & Engineering Value
The true value of the Optrex DMC-40457-NY-LY-B-CKN lies in its suitability for specific, demanding industrial roles where clarity and robustness are non-negotiable.
- Industrial Process Controllers: The four-line format allows for the simultaneous display of a Set Point (SP), Process Value (PV), Output Percentage, and Alarm Status, giving operators a complete, at-a-glance overview of a control loop.
- Test & Measurement Equipment: In devices like spectrum analyzers or power supplies, this display can clearly present multiple measurement channels, settings, and units, enhancing user accuracy and efficiency.
- Network Hardware & Rack-Mount Servers: Ideal for front-panel interfaces on routers, switches, or servers to display IP addresses, system status, load metrics, and error codes, simplifying setup and diagnostics in the data center.
- Medical Devices: Its reliable, clear display of vital parameters and settings makes it a suitable choice for stationary medical equipment where data integrity is critical. Proper industrial display maintenance ensures longevity in these environments.
Technical Deep Dive: The Engineering Behind the Reliability
Two key design choices elevate this module above standard character displays. First, its FSTN technology adds a retardation film to the STN cell, which corrects color dispersion and significantly improves the display's Contrast Ratio and viewing cone. This is a critical advantage in industrial settings where the operator may not be viewing the screen head-on. Second, the integration of the Sitronix ST7066U controller is a strategic decision that benefits the design engineer directly. As it follows the ubiquitous HD44780 standard, a vast ecosystem of code libraries and development knowledge is readily available, minimizing the integration risks and costs associated with more obscure controllers. This accelerates time-to-market for new product development.
Frequently Asked Questions (FAQ)
Our engineers often receive the following questions about integrating the DMC-40457-NY-LY-B-CKN:
1. What character fonts are built into the controller?
The module with the "-CKN" suffix contains the ROM Code 0A, which includes a standard English (ASCII) and Japanese (Katakana) character set. This covers a wide range of applications without the need for custom character generation.
2. Does the LED backlight require a separate current-limiting resistor?
Yes. The datasheet specifies the forward voltage (Vf) and forward current (If) for the LED backlight. You must add an external series resistor to limit the current from your power supply to the recommended value (typically 160mA @ Vf=4.2V) to ensure optimal brightness and prevent damage to the LED.
For more detailed questions about integrating this or other industrial LCD displays into your project, please contact our technical team for expert support.
