decrane aerospace LCDW-9320-101-X Installation Manual

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decrane aerospace LCDW-9320-101-X Installation Manual Manual pdf 9 page image

DeCrane Aerospace Audio International LCDW-9320-101-x Installation ManualDocument # 540363, Rev A1, 11/2008 Page 8 of 183.4 Wiring Requirements3.4.1 IntroductionThe installing agency shall supply and fabricate all external cablesand mating connectors. The length and routing of external cablesshould be carefully studied and planned before attemptinginstallation of the equipment. Allow adequate space for installationof cable and connectors. Avoid sharp bends and placing cablesnear aircraft control cables. Maintain a minimum clearance of three(3) inches from any control cable. If wiring is run parallel tocombustible fluid or oxygen lines, maintain a separation of six (6)inches between the lines.3.4.2 Power WiresDeCrane Aerospace Audio International recommends that thechassis be electrically bonded to the airframe structure by thegrounding lug with <0.1 resistance using <50 impedancecable. Power and Ground wires shall be in accordance withM22759 or equivalent. Protect power wires with circuit breakers orfuses located close to the electrical power source bus.3.4.3 Video LinesComposite Video connections shall be shielded coaxial cable inaccordance with M17/94-RG179 or equivalent. Cable shields shallbe grounded at the source. Use of individual wires rather thanproper coaxial cable connections through production breaks isunacceptable, and will cause significant and detrimental noiseintroduction to the video signal supplied to the LCDW-9320-101-x.Serial Digital Video connections are recommended to use shieldedcoaxial cable in accordance with PIC V76261 or equivalent.3.4.4 RS-485 ConnectionsRS-485 connections shall be twisted shielded cable with the shieldproperly grounded at the source (ideal practice) and floating at theload end. If shield cannot be grounded at the source, then groundat the load end with the source end floating. Each wire length shallbe terminated at one end only. The shield for RS-485 shall beterminated to a dedicated pin. Twisted shielded cable shall be inaccordance with NEMA WC 27500 or equivalent.