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* Angle of attack data
* SSEC data
* VMO/MMO data
* Overspeed warning status
* Antice system status
* ADR fail status.
The CDS DEU discrete word 1 has this data:
* Engine running status
* Engine start valve status
* Main landing gear position status
* Flaps position data.
The CDS DEU discrete word 2 has this data:
* Engine alternate mode select status
* Engine start lever position status
* Engine ignition switch status
* Engine start switch position status.
The CDS DEU discrete word 3 has this data:
* ECS isolation valve status
* ECS pack status
* ECS pack flow status
* Antice status
* Engine bleed switch status
* Flap position data
* Air/ground system status.
Engine EEC Bus
The DEUs send EEC data on the engine EEC buses. The DEUs
send all the labels received from the four EEC buses to the main
engine test connectors in the EE compartment. EEC channel A
data comes from DEU 1 and EEC channel B data comes from
DEU 2.
The engine EEC bus has this general data:
* EEC data
* Manufacturer and configuration data
* Thrust rating/airplane model data
* Exceedance data
* Internal protection status
* Engine internal sensing data
* Fuel system status
* Oil system status
* Engine air systems status data
* Maintenance data
* TRA data
* Thrust reverser status data
* ADIRU input data status.
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Engine EEC Bus
The DEUs send EEC data on the engine EEC buses. The DEUs
send all the labels received from the four EEC buses to the
FDAU. This information is used for the airplane condition
monitoring system. The data also goes to the main engine test
connectors in the EE compartment. EEC channel A data comes
from DEU 1 and EEc channel B data comes from DEU 2.
The engine EEC bus has this general data:
* EEC data
* Manufacturer and configuration data
* Thrust rating/airplane model data
* Exceedance data
* Internal protection status
* Engine internal sensing data
* Fuel system status
* Oil system status
* Engine air systems status data
* Maintenance data
* TRA data
* Thrust reverser status data
* ADIRU input data status.
ACARS Datalink Bus
The DEUs send data on the ACARS datalink bus to the ACARS
system. This is a customer configured system.
Analog Discrete Outputs
These are the discrete outputs from the DEUs:
* TCAS display status to the TCAS computer
* Weather radar (WXR) on/off signal to the WXR control panel
* Generator control unit (GCU) enable discrete
* Fuel filter bypass annunciator discretes to the fuel system
panel
* BITE power up discrete to the APU ECU
* Engine start switch hold discretes to the engine start
switches
* Engine control annunciator discretes to the engine control
module
* Discretes to the engine alternate (ALT) power (PWR) relays
* Discretes to the engine running relays when the engine is
running or the start levers are in idle for longer than 5
minutes.
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CDS - EXTERNAL INTERFACE INTRODUCTION
CDS - EXTERNAL INTERFACE INTRODUCTION
EFFECTIVITY
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Air Data Inertial Reference Unit
The air data inertial reference units (ADIRUs) send data to and
receive data from the display electronic units (DEU) on ARINC
429 buses.
The ADIRUs send this air data to the DEUs:
* Uncorrected altitude
* Baro corrected altitude
* Mach number
* Computed airspeed
* VMO/MMO
* True airspeed
* Total air temperature
* Indicated angle of attack (AOA)
* Total pressure
* Static pressure
　
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