UNIOP KNW 00-B/L (MD02R-04) 25Hp Air Compressor Operator HMI Panel

Overview

The UNIOP MD02R-04 (KNW 00-B/L) is a custom-engineered operator panel designed specifically for 25 horsepower air compressors. It provides a reliable and intuitive interface for controlling and monitoring compressor operations. The panel features a 2-line by 20-character backlit LCD for clear status display and 8 programmable function keys for process control. Built on UNIOP's proven MD series platform, it offers robust performance in industrial environments.

Key Features

• 2-line x 20-character LCD with green LED backlight

• 8 programmable function keys with tactile feedback, including dedicated start/stop and menu navigation

• Isolated RS232 and RS485 communication ports for connection to compressor controller

• IP65 front panel for protection against dust and moisture

• Custom firmware pre-loaded for air compressor protocols

• Wide power supply range: 12-24 VDC

• Compact panel-mount design

Technical Specifications

• Display: 2 lines, 20 characters, 5x8 dot matrix, STN LCD with LED backlight

• Keys: 8 membrane keys, 1 million operations

• Processor: 16-bit microcontroller

• Memory: 512 KB Flash for application storage

• Serial Ports: 1 x RS232, 1 x RS485 (isolated, up to 115.2 kbps)

• Power Consumption: < 3 W

• Operating Temperature: 0°C to +50°C

• Dimensions: 150 x 90 x 38 mm

• Weight: 0.4 kg

Integration with Air Compressor

The MD02R-04 comes pre-configured with the specific protocol and screen layouts required for 25Hp air compressors. It displays critical parameters such as discharge pressure, air temperature, motor current, and total run hours. Operators can start/stop the compressor, adjust pressure setpoints, and acknowledge alarms directly from the panel. The isolated serial interface ensures reliable communication in electrically noisy environments typical of compressor rooms.

Applications

This HMI is designed exclusively for 25Hp reciprocating or rotary screw air compressors, providing a drop-in replacement or upgrade for the original operator interface. It is suitable for use in manufacturing plants, automotive repair shops, and any facility relying on compressed air systems.

Certifications

CE and UL certified. IP65 front panel protection. Designed to meet industrial immunity standards.