AirCell ST 3100, Руководство по установке

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Note
The addition of some type of external annunciation is advisable, if only the AirCell
®
Cordless Handsets
are to be installed. This is due to the AirCell
®
Cordless Handsets having a lower ringer volume than the
corded types. The AirCell
®
Cordless Handset ringer can be turned down to a level that might not be
noticed in a noisy aircraft environment.
3.9. Intercom Alert
The Intercom Alert seeks a low (ground) from a momentary push button switch located near the
telephone handsets (refer to Wiring Diagrams, Section 10.0). Activation of this momentary switch will
alert the other Handset stations that intercom activity is requested. Use this logic to activate an
annunciator or Sonalert on the Ring Detect output.
3.10. Cabling
Note
Wire and Coax Installation
Installation of wire and antenna coax cables should be installed according to approved aircraft
manufacturing guidelines and/or FAA procedures documented in AC 43.13-1B. Consider cable slack,
protection from heat, and protection from chafing when installing system wiring.
Good installation practices will ensure maximum performance from the ST 3100 System. FAA AC 43.13-
2A (Acceptable Techniques, and Practices - Aircraft Alterations), Chapter 2.27, and FAA AC 43.13-1B
(Acceptable Methods, Techniques, and Practices), Chapter 11 provide excellent guidelines to ensure a
good installation. When building the system wire harness and RF cables, observe the following:
1. Plan the AirCell
®
cable routing so that it does not interfere with flight control cables or follow
heavy current-carrying cables, hydraulic lines, or fuel lines.
2. It is essential to use Military Specification Connectors or connectors approved for use on aircraft.
3. Refer to FAA AC 43.13-1B for the proper wire types. Wiring should conform to MIL-W-22759 or
MIL-C-27500 (AC 43.13-1B, 11, 89 or AC 43.13-1B, Tables 11-11 and 11-12) as applicable.
Installation of wire and antenna cables should be according to approved FAA procedures and
follow FAA AC 43.13-1B. Consider cable slack, protection from heat, and protection from chafing
when installing system wiring.
4. This document and attached Interface Control Drawings (ICDs) only shows a suggested circuit
breaker size, wire size & type for a typical installation:
•
It is the responsibility of the Installation Agency to ensure proper wire type and size and
the use of a properly rated circuit protection device (circuit breaker). In addition, ensure
that the 28 Volts Direct Current (VDC) bus the equipment is to be connected to can
handle the additional electrical load.
•
Install circuit protection (circuit breaker) of the proper amperage to handle the power
requirements and protect the wiring.
•
Refer to Aircraft manufacturing guidelines and/or refer to FAA Advisory Circular 43.13-
1B, Section 11 (Aircraft Electrical Systems) for the proper wire types and circuit
protection recommendations. All wiring and coax cabling shall conform to the
flammability requirements of FAR 25.869.
•
Single wire conductors shall conform to Aircraft manufacturing guidelines and/or
Fluoropolymer-Insulated Society of Automotive Engineers (SAE)-AS22759, also known
as Military (MIL)-W-22759.
•
Shielded wire conductors shall conform to Aircraft manufacturing guidelines and/or
Fluoropolymer-Insulated National Electrical Manufacturers Association (NEMA) WC
27500, also known as MIL-DTL-27500.
•
These wires shall be used for Power, Ground, Low Speed Signal, and Shield Drains.
Installation Procedures
Page 3-3
Section 3
800-10680-C, May 2007