REV. 1 August 17, 2004
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SECTION 2 INSTALLATION CONSIDERATIONS
2.1 COOLING
No direct cooling is required. As with any electronic equipment, overall reliability may be
increased if the MD41-( ) is not located near any high heat source or crowded next to other
equipment. Means of providing a gentle air flow will be a plus.
2.2 EQUIPMENT
LOCATION
The MD41-( ) must be mounted as close to the pilot’s field of view as possible. The preferable
location is near the HSI/CDI that will be displaying the GPS/NAV information. The unit depth,
with connector attached, must also be taken into consideration. Note: Unlike previous versions of
the MD41 Annunciation Control Units (ACU), the transfer relays are not required as all switching
between GPS, VOR and ILS is handled by the GNS 480 or CNX80.This has allowed a for a
smaller size ACU which now provides more options for panel mounting.
2.3
ROUTING OF CABLES
Care must be taken not to bundle the MD41-( ) logic and low level signal lines with any high
energy sources. Examples of these sources include 400 HZ AC, Comm, DME, HF and
transponder transmitter coax. Always use shielded wire when shown on the installation print.
Avoid sharp bends in cabling and routing near aircraft control cables.
