Data concentration typically involves a Data Concentrator Unit (DCU) interfacing to various avionic and air vehicle discrete, digital, and analog inputs for monitoring, passing through data and controlling various aircraft subsystem components. Often data concentration is necessary when upgrading avionics to, say, a glass cockpit, or when adding functionality such as warning and alert indication or status information to aid maintenance operations. The DCU’s from Curtiss-Wright can be configured to operate in a master-slave control mode where inputs and outputs can be coupled for active-active or active-inactive control. This configuration can be used to reduce the complexity of the aircraft system design, interface I/Os and overall weight of the aircraft.
Curtiss-Wright’s DCUs have been designed to meet or exceed the most stringent aerospace requirements. The units receive a diverse assortment of discrete, analog and digital inputs, which are processed and formatted for use by various aircraft systems. Each DCU is designed for tool-less removal and replacement and accommodates a wide array of digital communication protocols. These protocols include EIA/TIA-232,-422, -485, ARINC 429, USB 2.0, ARINC 664, MIL-STD-1553, CAN bus and Ethernet. Each unit is capable of supporting multiple independent, self-contained processors. To provide redundancy, two DCUs are installed per aircraft.
The compact units may be tray mounted or mounted directly to the air frame. DCUs do not have to be removed for data access when Operation Flight Program Software is used to remotely download data by way of Ethernet via the ARINC 615 protocol