ACCESS/A A711 L-Series Installation & Operating Instructions 09RE416
Technisonic Industries ltd. Copyright 1996, 1997, 2010, 2011 BY TiL ALL RIGHTS RESERVED Page 2-2
2.4
ACCESS/A AUDIO PANEL INSTALLATION
The A711L ACCESS/A Audio Controls are designed to be Dzus mounted and should be installed
in conjunction with an IN-A711L installation connector kit. See Figure 2-1 for an outline drawing
of the units with dimensions, to facilitate the installation.
CABLE CLEARANCE:
Allow at least 2.5” of additional rear clearance for mating connectors and hoods (side routing),
or 3.0” (back routing). Cables should be long enough to permit the unit to be removed from the
panel, and the connectors to be easily disengaged. DO NOT dress or strap the mating cables so
that front removal is impossible, or the unit cannot be removed for service or adjustment in the
field.
ALERT OPERATION:
3 Tone alerting can be supplied with this unit from the factory. Tone frequency and cycle rate, as
well as # 3 alert on-time can be adjusted at the rear of the unit. Field installation of the tone option
must be done at a fully equipped service bench, and requires a system functional test & re-
certification.
PANEL MODIFICATIONS:
Modified panel legends, panel lighting and NVG compatibility, or optional functions are
also possible; please see the price list for a full summary of options and part numbers. Overlays
and legends may be easily changed at low cost in the field with no special tools or service facilities
required.
SHIELD GROUNDS:
Convenient shield ground connections are provided at each connector for the indicated input
signal shield drains, and will give the shortest possible return for these lines. These shield lines
should be daisy chained together, and a single wire from each cable brought out to the designated
connector pin.
INTERNAL OPTIONS:
All configurable and variable options of the A711L (pilot H/S impedance, muting logic, included
speaker audio lines, etc.) can be set or changed simply by altering internal jumpers, but these
changes require opening the unit for access to the required connections.
DRAWINGS:
A full ACCESS/A (mono) system installation example is given in the multi-page sections of Figure
2-x. These installation and mechanical drawings are available as AutoCAD files (“DWG”/R12
format, Windows Metafile “WMF” or “DXF” format) free of charge to authorized TiL dealers and
completion centres.
WIRING CONCEPT OVERVIEW:
Do NOT connect un-needed radio wiring or alerting triggers to any control, even though it
can theoretically operate that radio, as increased cross-talk and possible accidental operation will
result. For good spares support, you may want to have all controls the same, but operationally it
rarely makes sense in the airframe for everyone to have every signal or radio access. Un-
terminated signal inputs pre-wired as spares may become a serious noise source, and are not
recommended. You can run spare wiring, but do not connect it to the A711L until used.
