EMS Technologies Canada Ltd. A781 User Manual
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781 SDU, SCM, and FMPA
23-15-30
1-5
16 APR 10
Table 1-2 provides a summary of the physical characteristics and equipment specifications of
the SCM component.
the SCM component.
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
Electrical Interfaces
Power/Control interface
as per ARINC 781
Power Requirements
Input Voltage (AC)
96 to 122 V AC, 300 to 900 Hz
Input Voltage (DC)
18 to 32.3 V DC
Power Consumption
300 VA if operated with an external FMPA
400 VA if operated as standalone
Table 1-1 SDU Physical Characteristics and Specifications (Continued)
CHARACTERISTIC
SPECIFICATION
Table 1-2 SCM Physical Characteristics and Specifications
CHARACTERISTIC
SPECIFICATION
RELATED DOCUMENTS
ARINC characteristics
ARINC 781 Mark 3 Aviation Satellite
Communications System
Communications System
RTCA documents
DO-254, Design Assurance Guidance for Airborne
Electronic Hardware
Electronic Hardware
DO-160E, Environmental Conditions and Test
Procedures for Airborne Equipment
Procedures for Airborne Equipment
SCM SPECIFICATIONS
Physical Size
Length
11.43 cm (4.5 in)
Width
10.16 cm (4.0 in)
Height
2.54 cm (1.0 in)
Weight
0.454 kg (1.0 lbs)