KDU-44 Keyboard Display Unit

KDU-44 Keyboard Display Unit is a color display using Active Matrix Liquid Crystal Display (AMLCD) technology, with an active display area of 4 by 4 inches.

KDU-44 is designed to fully comply "ARINC-739 Multi- purpose Control and Display Unit" standard. It can transmit, receive and display data and status information from subsystems that are compatible with ARINC-429 and ARINC-739 standards.

KDU-44 provides Man Machine Interface (MMI) for operator data entry, avionics subsystem mode selections and subsystem status displays (flight, navigation, communication, weapon management) in accordance with ARINC-739 protocol.

Important Features

General Specifications

  • ARINC-739A Protocol Support
  • Wide Active Area
  • NVIS Class B Compatible
  • Alphanumeric Keys
  • Compact Design
  • Easy to Integrate
  • Ideal Match for Mission Computer Applications
  • RTCA/DO-178B Compatible Software

Display Specifications

  • Display Typer: Color Active Matrix Liquid Crystal Display
  • Display Area: 4" x 4"
  • Resolution: 480 x 480 (120 PGPI)
  • Display Color: 262144 colors
  • Viewing Envelope: +/- 45° horizontal
                                         +/- 60° vertical
  • Luminance Range: 0.04 fL - 160 fL
  • NVIS Compatibility: MIL-L-85762A, Class B

Technical Specifications

  • Interfaces: ARINC-429 Serial Communication, Discrete I/O Interfaces, RS-422 (Maintenance Interface),              RS-232 (Maintenance Interface)
  • Operating Voltage: 28VDC
  • Power Consumption: 40W (Operating)
                                              80W (Heaters On)


  • Environmental Conditions: MIL-STD-810
  • EMI/EMC: MIL-STD-461
  • Power: MIL-STD-704

Physical Specifications

  • Dimensions : 190.5 mm (H) x 146 mm (W) x 114 mm (D)
  • Weight : < 2.5 kg
  • Cooling : Natural Convection