User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 3-2
3 JUN 10
(1) Cabling
When installing the HSD-440 Mark 2 Terminal, follow the cabling requirements listed
below:
• Maximum recommended length for Ethernet cables is 50 feet.
• LAN cables must meet flammability, TIA/EIA568-A CAT 5, requirements and
conform to ARINC 628 specifications.
• Wire size recommendations:
•For +28 V dc HOT (BP2), +28 V dc RTN GND (BP3), 115 V ac COLD (BP7),
and Chassis GND (BP8), use 12 AWG
•For 115 V ac HOT (BP1), use 20 AWG
• Unless otherwise specified, for signaling, use 22 AWG
(2) Coaxial Cable Loss Considerations
When installing HSD-440 Mark 2 Terminals, consider the following coaxial cable loss
requirements:
• Transmit cable: maximum loss is 2.5 dB, including DLNA (typically <0.8 dB), as
per ARINC 741. In installations that use a high power relay, the high power relay
loss must be included.
• Receive cable: minimum loss is 6 dB, maximum loss is 25 dB (including any
in-line attenuator), as per ARINC 741.
3. Mechanical Installation
This section contains the information required to plan the physical placement of HSD-440 Mark
2 Terminals. The Outline and Installation diagrams, shown in
Figure 3-6 and Figure 3-7,
illustrate the physical and mechanical specifications of the HSD-440 Mark 2 Terminal.
In typical aircraft installations, the HSD-440 Mark 2 Terminal assembly fits into standard ARINC,
8-MCU mounting trays.
A. Physical Placement
When selecting a location for the HSD-440 Mark 2 Terminal, allow for adequate spacing
for the installation while providing reasonable access for servicing. Leave a minimum
gap of 0.5 inches between LRUs.
B. Environmental Requirements
The environmental requirements that must be considered during the physical placement
of the HSD-440 Mark 2 Terminals are based on the RTCA/DO-160E Environmental
Specifications detailed in
"System Description" on page 1-1.
The mounting trays offer a number of fan configuration options depending on the physical
placement of the LRU in the aircraft.
(1) Heating and Cooling
Refer to "System Description" on page 1-1 for a complete listing of the
RTCA/DO-160E Environmental Specifications for the HSD-440 Mark 2 Terminals.