Audio International, Inc
.
RCD-201-01-x Installation & Operation Manual
Document # 540225, Rev IR, 01/2001
Page 9 of 18
4.0 Wiring
Requirements
4.1
Introduction
The installing agency shall supply and fabricate all external cables. The
length and routing of external cables shall 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.
4.2 Power Wires
All power and ground wires shall be 22 AWG, MINIMUM. Power ground
wires shall be grounded within twelve inches of the unit. All wires shall
be
in accordance with the standard military specification of MIL-W-22759 or
equivalent. Twisted, shielded cable shall
be in accordance with the
standard military specification of MIL-DTL-27500 or equivalent. Protect
power wires with circuit breakers or fuses located close to the electrical
power source bus.
4.3
Audio Wires
All audio wire connections require twisted shielded cable with the shield
properly grounded at the source. Twisted shielded cable shall be in
accordance with the standard military specification of MIL-DTL-27500 or
equivalent.
4.4 AI’s Proprietary RS-485 Data Bus
4.4.1 The RCD-201-01-x is designed to interface with other Audio
International equipment via AI’s proprietary RS-485 serial data bus.
The data bus shall
be implemented using a twisted shielded pair
cable in accordance with the standard military specification of
MIL-DTL-27500 or equivalent. The wire size for the conductors in
this cable shall
be 22 AWG, MINIMUM. The shield shall
be
connected everywhere a shield pin is provided. Shield terminations
shall be made as close to the connector pin as possible.
4.4.2 All modules on AI’s proprietary RS-485 data bus shall
be connected
in a ‘daisy-chain’ configuration. AI’s proprietary RS-485 data bus
specification is available upon request.
