PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-070-0006
Page 2-2
Rev. 6, Nov 98
2.3 Equipment Installation Procedures
2.3.1 Cooling Requirements
Forced air cooling of the PMA7000M-S is not required. However the unit should be kept
away from heat producing sources (i.e. defrost or heater ducts, dropping resistors, heat
producing avionics) without adequate cooling air provided.
2.3.2 Mounting Requirements
The PMA7000M-S must be rigidly mounted to the instrument panel of the aircraft struc-
ture and within view and reach of the pilot position(s). Installation must comply with FAA
Advisory Circular AC 43.13-2A. The unit may be mounted in any area where adequate
clearance for the unit and associated wiring bundle exist.
Avoid installing the audio panel close to high current devices or systems with high-voltage
pulse type outputs, such as DME or transponders.
NOTE
: The mounting hole configuration for the PMA7000M-S is identical to the
PMA6000 series and KMA-24 Audio Selector Panels.
2.3.3 Mounting Rack Installation
Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in
the center of the unit. Use caution to avoid hitting the photo-detector lens. Carefully slide
the unit free of the tray. Set the unit aside in a safe location until needed. Install the tray
using six FHP 6-32 x ½" screws. The audio selector panel must be supported at front and
rear of the mounting tray.
2.3.4 Connector Assembly
The unit connectors mate directly with the circuit boards in the PMA7000M-S. The con-
nectors are a Molex crimp-type, and require the use of a Molex hand crimp tool, EDP P/N
11-01-0203, CR6115B (or equiv.). The connectors are mounted to the unit tray with #4-
40 screws, from the inside of the tray. Ensure that proper strain relief and chafing precau-
tions are made during wiring and installation.
2.4 Cable Harness Wiring
Referring to the appropriate Appendix, assemble a wiring harness as required for the in-
stallation. All wires must be MIL-SPEC in accordance with current regulations. Two- and
three-conductor shielded wire must be used where indicated, and be MIL-C-27500 or
equivalent specification. Proper stripping, shielding and soldering technique must be used
at all times. It is imperative that correct wire be used.
Refer to FAA Advisory Circular 43.13-2A for more information. Failure to use correct
techniques may result in improper operation, electrical noise or unit failure. Damage
caused by improper installation will void the PS Engineering warranty.