Specifications

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 8 of 14
3.4.3 Power Wires
All power and ground wires shall be 20 AWG, MINIMUM. Power
ground wires shall be grounded within twelve inches of the unit.
Protect power wires with circuit breakers or fuses located close to
the electrical power source bus.
3.4.4 AI’s Proprietary RS-485 Serial Data Bus
The ASP-101-02-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 MIL-DTL-27500 or equivalent. The wire
size for the conductors in this cable shall be 22 AWG, MINIMUM.
The shield shall be connected to a shield pin or to ground at one
end of the connection between devices. Shield terminations shall
be made as close to the connector pin as possible.
Maximum derivation distance from data bus splice connections to
actual connector of each data bus device is 24 inches in length. All
modules on AI’s proprietary RS-485 serial data bus shall be
connected in a daisy-chain configuration.
3.4.5 MIL-SPEC Requirements
All wires shall be in accordance with MIL-W-22759 or equivalent.
Twisted shielded cable shall be in accordance with MIL-DTL-27500
or equivalent.
3.4.7 Clearance and Separation Requirements
When running cables, 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.
3.5 Physical Characteristics
3.5.1 The ASP-101-02-x should be located away from heat sources,
magnetic fields, direct sunlight, and areas with excessive dust
and/or moisture. The unit shall NOT be mounted to the skin of the
aircraft.
3.5.2 Refer to Section 7.0 for unit dimensions and mounting hole sizes.