DeCrane Aerospace Audio International
MCD-9101-101-x Installation & Operation Manual
Document # 540360, Rev IR, 03/2008
Page 10 of 28
3.4.4 Analog Audio Wiring
DeCrane Aerospace Audio International recommends that all
analog audio wire connections be twisted shielded cable with the
shield properly grounded at the source (ideal practice). If shield
cannot be grounded at the source, then ground at the load end with
opposite end floating. Twisted shielded cable shall be in
accordance with
NEMA WC 27500.
3.4.5 DeCrane Aerospace Audio International’s Proprietary
RS-485 Data Bus
The MCD-9101-101-x is designed to interface with other DeCrane
Aerospace Audio International equipment via DeCrane Aerospace
Audio International’s proprietary RS-485 serial data bus. The data
bus shall
be implemented using a twisted shielded pair cable in
accordance with
NEMA WC 27500
or equivalent. The wire size for
the conductors in this cable shall
be 22 AWG, MINIMUM. Shield
pins are available for connecting data bus shields when required.
Refer to DeCrane Aerospace Audio International document 650007
for RS-485 Serial Data Bus design architecture.
3.5 Physical Characteristics
3.5.1 Refer to Section 7.0 for unit dimensions and attachment points.
3.5.2 When mounting the unit, allow sufficient space for mating
connectors.
3.5.3 Mounting provisions are provided via four (4) 8-32 UNF-2B
threaded mounting holes – two (2) on each the left and right sides
of unit.
3.5.4 Do not insert any screw more than 0.25" into the case. Mounting
holes on the unit provide multiple anchoring points. These threaded
inserts do not have physical stops. Care should be taken not to
penetrate the outer casing with any screw more than 0.25". This
could result in serious damage to the unit.
3.5.5 Allow a MINIMUM of 1 inch of air space around the unit to allow for
proper air circulation. This unit has an internal fan and ventilation
holes in the chassis for cooling. Installation recommendation
requires 1-inch spacing from other components and structures
except the mounting surface for which the unit should be in direct
contact.