The Fairchild Controls Multifunction Digital Controller (MDC) provides precise control capabilities with the added ability to monitor the operational status of the controller while on board an aircraft. The unit is specially designed to meet the needs of military and commercial avionics and is based on a field-programmable gate array (FPGA). The MDC offers customizable system performance and modifiable operation to meet customer specific requirements with an option to implement an ARM processor core.
| Product Specifications: | |
| Dimensions: | 8.1″L x 6.9″W x 2.9″ H |
| Weight: | 4.5 lbs |
| Altitude: | Sea level to 60,000 ft |
| Temperature Range: | Non-operating/Storage: -62°C to +100°C Operating: -55°C to +85°C |
| Input Power: | 28 VDC EMI/EMC: Qualified per MIL-STD-461 Power quality: Qualified per MIL-STD-704 |
| Analog Inputs: | Ten fully-differential ±10V |
| Resistance Measurements: | Four two-wire and one four-wire |
| Discrete I/O: | Eight configurable input outputs |
| Power Distribution Outputs: | Seven 28V outputs, one 12V output Current rating: 28V out = 600 mA Max, 12V out = 1.45 Amps Max with programmable current limit |
| Sensor Power Interface: | One 15V, two 12V and one 5V |
| Serial Interfaces: | Two EIA485 and one isolated EIA422 interface |
- The MDC accepts and operates upon sensor data through generic interface circuits (analog voltage, resistance, discrete I/O). These interfaces include but are not limited to: pressure sensors, current sensors, contact sensing, RTD’s and thermistors.
- The MDC provides 28V and 12V switched outputs to actuate relays and solenoids or to provide power to remote units. The output current is monitored and these outputs can be de-engergized in the event of over-current conditions.
- The unit is designed to be cooled by conduction and natural convection in unpressurized and unconditioned aerospace environments.
- Additional features include low current 5V, 12V and 15V power outputs, a stepper motor output and a 4 Mbyte non-volatile flash storage to facilitate data logging.
There are two electrical interface connectors mounted to the controller; one is designed for connection to the host vehicle interface (D38999) while the other is for control and status of the target system (Glenair Series 80).
The unit receives external command signals and electrical power from the vehicle. The MDC interfaces to additional customer systems via EIA422 or EIA485 serial busses
