User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-200 SDU and SCM
23-15-30 1-4
DATE TBD
By storing configuration information independent of the SDU, the SCM facilitates efficient
SDU replacement. A new SDU that replaces a faulty SDU does not require any
configuration. All configuration information is obtained from the SCM.
3. Equipment Specifications
This section includes the physical and environmental characteristics of the A781-200 SDU and
SCM.
Table 1-1 provides a summary of the physical characteristics and equipment specifications of
the SDU component.
Table 1-1 SDU Physical Characteristics and Specifications
CHARACTERISTIC SPECIFICATION
RELATED DOCUMENTS
ARINC characteristics ARINC 781-4 Mark 3Aviation Satellite
Communications System
ARINC 600 Air Transport Avionics Equipment
Interfaces
RTCA documents DO-254, Design Assurance Guidance for Airborne
Electronic Hardware
DO-178B, Software Considerations in Airborne
Systems and Equipment Certification
DO-160E, Environmental Conditions and Test
Procedures for Airborne Equipment
DO-210, Minimum Operational Performance
Standards (MOPS) for Geosynchronous Orbit
Aeronautical Mobile Satellite Services (AMSS)
Avionics
SDU SPECIFICATIONS
Physical Size
Length 37.24 cm (14.66 in)
Width 19.35 cm (7.62 in)
Height 19.93 cm (7.85 in)
Weight 11.30 kg (24.9 lbs)
Heating and Cooling
Cooling Air ARINC 600
Flow Rate 50 kg/hr 40°C (max) air
Pressure Drop 5 ± 3 mm H
2
O
Mounting Information 6 MCU tray as per ARINC 600