User's Manual

Airbus Iridium SATCOM System
165E5733-00 L-3 Aviation Recorders Proprietary
Issue, Rev. 02
21 January 2014
Page 30
3.5.3 ARINC 429 Digital Serial Bus Input
Quantity: 16
Format: DITS, ARINC 429 Low or high speed
Low Speed Data Rate: 12.5 Kbps ± 1%
High Speed Data Rate: 100 Kbps ± 1%
SSM/SDI/Data Definition: Software Selectable Protocols
3.5.4 ARINC 429 Digital Serial Bus Output
Quantity: 6
Format: DITS, ARINC 429 Low or high speed
Low Speed Data Rate: 12.5 Kbps ± 1%
High Speed Data Rate: 100 Kbps ± 1%
SSM/SDI/Data Definition: Software Selectable Protocols
3.5.5 Ethernet
Quantity: 4
Format: 802.3 10BASE-T/100BASE-TX, half- and full-duplex
modes (auto-negotiated)
ARINC 664P2 Physical Layer
3.5.6 Discrete Inputs
Quantity: 16 Configurable
Input Impedance: >10 kΩ
Fault Current: <15 mA
DIN+ Voltage Range: Logic High: 7.0 – 36.0 VDC
Logic Low: 0 – 3.5 VDC
Pulse Width (Min): 100 ms
3.5.6.1 Configurable Inputs
Each configurable discrete input is individually software-configurable for the following:
 Signal Level: Open-Ground (Negative-Seeking) or Open-28V (Positive-Seeking)
 Logic Assignment: Active Low or Active High
 Function: Selected from list.
Refer to §6.10 for additional information on use of configurable inputs.