ACCESS/A A711 L-Series Installation & Operating Instructions 09RE416
Technisonic Industries ltd. Copyright 1996, 1997, 2010, 2011 BY TiL ALL RIGHTS RESERVED Page 2-1
SECTION 2
INSTALLATION INSTRUCTIONS
2.1
GENERAL
This section contains information and instructions for the correct installation of the A711 L-Series,
ACCESS/A Audio Controllers. For convenience they are referred to as A711L in the manual.
Make certain that the unit is correctly operating in accordance with the equipment user's
requirements and manufacturer’s specifications, prior to releasing the equipment for service.
2.2
EQUIPMENT PACKING LOG
Unpack the equipment and check for any damage that may have occurred during transit. Save
the original shipping container for returns due to damage or warranty claims. Check that each
item on the packing slip has been shipped in the container. Verify that the equipment's
backlighting configuration is the same as that required.
IMPORTANT! There are ferrite beads on component leads which can produce
IMPORTANT! There are ferrite beads on component leads which can produce
IMPORTANT! There are ferrite beads on component leads which can produce
IMPORTANT! There are ferrite beads on component leads which can produce
a muted rattle when the box is shaken, THIS IS NORMAL, DO NOT BE
a muted rattle when the box is shaken, THIS IS NORMAL, DO NOT BE
a muted rattle when the box is shaken, THIS IS NORMAL, DO NOT BE
a muted rattle when the box is shaken, THIS IS NORMAL, DO NOT BE
ALARMED.
ALARMED.
ALARMED.
ALARMED.
2.3
WIRING REQUIREMENTS
Airframe wiring should be single conductor in accordance with MIL-W-22759 or multi-conductor in
accordance with MIL-C-27500 or Raychem 44 (81044) or 55 single or multi-conductor and
shielded wire. Heat shrink solder sleeves (such as Raychem or equivalent) should be utilized for
shield termination.
All Microphone audio input and output line connections should be made with 2 conductor/twisted
pair shielded cables as illustrated. Receiver audio input lines should also be 2 conductor twisted
pair shielded cables. The power and ground lines should be a minimum of #22 AWG (#20
preferred). Keying and all audio lines may be #24 AWG or larger.
CAUTIONS:
DO NOT bundle any low level audio lines with RF coaxial cables, 60 Hz or 400Hz AC
inverter, motor, pump or blower wiring, which can cause noise coupling between the various
systems, especially during RF transmission or pump/blower mechanical operation. Maintain as
much distance as possible from these types of wire bundles.
Note that there is really no effective field-installable shielding for magnetic coupling (which
occurs at high currents), and the only suitable prevention for this type of interference is distance
between the interfering lines. Shielded wiring is effective only for electrostatic coupling, or voltage
driven interference.