Atlas Copco 1900-0711-51 Display Keypad Unit

The Atlas Copco 1900-0711-51, also listed as 1900071151, is a high-visibility operator interface module designed for use with Atlas Copco compressor controllers. This unit combines a high-contrast graphic display with a durable membrane keypad, enabling operators to monitor system parameters, adjust setpoints, and acknowledge alarms with minimal effort.

User Interface Design

The display features a 128x64 pixel graphic LCD with LED backlighting, ensuring readability in both bright sunlight and low-light conditions. The keypad comprises 16 tactile buttons with positive click feedback, including function keys, numeric entry, and navigation arrows. The layout is ergonomically optimized for gloved-hand operation, making it suitable for industrial maintenance environments.

Display Capabilities

This unit can show real-time pressure, temperature, motor current, and runtime hours in customizable screen layouts. It supports multiple languages and can display trend graphs for the last 24 hours of operation, aiding in performance analysis. Alarm and warning messages are prioritized and shown with clear icons, helping operators quickly identify and address issues.

Hardware Specifications

• Display Type: Monochrome graphic LCD, 128 x 64 pixels

• Backlight: White LED, adjustable intensity

• Keypad Material: Polyester overlay, chemical-resistant

• Electrical Interface: RS-232 serial connection, 9600–115200 baud

• Supply Voltage: 5 VDC derived from controller, or external 24 VDC via converter

• Operating Temperature: -10 °C to +60 °C

• Front Protection: IP54 (dust and splash-proof)

Integration with Controllers

The 1900-0711-51 is designed to work seamlessly with Atlas Copco’s 1900 series controller boards, including the 1900-0701-04 and 1900-0710-52. It communicates via a simple serial protocol, requiring only a four-wire cable for power and data. The unit automatically detects the controller type and loads the appropriate menu structure, simplifying installation.

Operational Features

Operators can use the keypad to change operating modes (e.g., auto, manual, remote), adjust pressure bands, and set timers for scheduled maintenance. The unit also supports password-protected access levels to prevent unauthorized changes to critical parameters. A built-in buzzer provides audible feedback for key presses and alarm annunciation.

Durability and Maintenance

The front overlay is resistant to oils, solvents, and UV exposure, ensuring long service life even in harsh environments. The keypad contacts are rated for over 1 million cycles. Maintenance is limited to cleaning the display with a soft, damp cloth; no internal adjustments are required. The unit is field-replaceable without affecting the controller’s memory.

Application Use Cases

This display keypad is commonly used on portable compressors, generator sets, and industrial chiller systems where a compact, reliable HMI is needed. It is also ideal for retrofitting older machines that lack a modern operator interface, bringing them up to current usability standards. Its low power consumption makes it suitable for battery-powered or solar-assisted installations.

Certifications and Standards

The 1900-0711-51 carries CE and FCC certifications, complying with electromagnetic compatibility and low-voltage directives. It is designed to meet the vibration and shock requirements of IEC 60068-2, ensuring reliable operation in mobile equipment applications.

Conclusion

With its clear display, robust keypad, and seamless integration, the Atlas Copco 1900-0711-51 display keypad unit enhances operator efficiency and system transparency. It is an essential component for any Atlas Copco compressed air installation that demands intuitive local control and monitoring.