Audio international DVD-01x-40x, Руководство по установке изделия

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AUDIO INTERNATIONAL, INC. 2/98
7
Document #540066, Rev. IR, Model No.: DVD-01x-x, DVD-01x-40x
2.3 Cautions & Warnings
2.3.1 All audio and video connections to the unit should be shielded and
properly grounded. Perform a pin-to-pin check to confirm that all wires
terminate in their proper location. It is important to do a power and
ground check on the pin connections. Ensure that power and ground are
applied only where required.
2.3.2 DO NOT connect or disconnect the unit while power is applied.
2.3.3 DO NOT remove any factory-installed screws. Damage to the unit may
result and any warranties will become void.
2.4
Wiring Requirements
2.4.1 The installing agency must supply and fabricate all external cables. The
length and routing of external cables must be carefully studied and
planned before attempting installation of the equipment. Allow adequate
space for installation of cable and connectors. Avoid sharp bends and
placing cables near aircraft control cables. Maintain a minimum clearance
of three (3) inches from any control cable. If wiring is run parallel to
combustible fluid or oxygen lines, maintain a separation of six (6) inches
between the lines.
2.4.2 All power and ground wires must be 22 AWG minimum. All audio and
video lines require twisted, shielded cable with the cable shields properly
grounded at the source. Power ground wires must be grounded within
twelve (12) inches of the unit. All wires must be in accordance with MIL-
W-22759 or equivalent. Twisted, shielded cable must be in accordance
with MIL-W-27500 or equivalent. Protect power wires with circuit
breakers or fuses located close to the electrical power source bus.
2.4.3 The DVD is designed to interface with other AI equipment via the RS-485
data bus. This is a bi-directional data bus that allows multiple units to be
connected simultaneously. The lines are daisy-chained between units with
120-ohm resistors installed at both ends of the wiring harness. Cable
designed specifically for data bus use with 120-ohm nominal impedance
should be utilized. Contact Audio International for recommended cables
and interface to RS-485 data bus.
2.5 Physical Requirements
2.5.1 Refer to Section 5.0 for unit dimensions and attachment points.
2.5.2 Allow a minimum of 1” air space around the unit to allow for proper air
circulation to prevent the build-up of internal heat.