PS Engineering DRAWS - Manual (Page 7)

PS Engineering
PRD60 Remote DRAWS Unit
Installation and Operator’s Manual
200-160-0200 Page 2-2 Rev 3, Sept. 2012
2.3.2 Mounting Requirements
The PRD60 must be rigidly mounted to the aircraft structure. 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. The unit may be
mounted in any position or orientation.
Avoid installing the PRD60 close to high current devices or systems with high-voltage
pulse type outputs, such as DME or transponders.
To install the PRD60, select a location convenient to the warning panel providing the out-
put, and the audio panel. The unit may be installed in any position, on a surface that will
allow for installation in accordance with AC43-13-2A.
2.3.3 Connector Assembly
The unit connector is a male DB25 connector. This is a crimp-type connector. These are
crimp-type connectors. The AMP Contact Crimping Tool, AMP 601966-1 (or MS22520
equiv.), with Positioning Tool 601966-5 must be used to ensure good quality harness.
Ensure that proper strain relief and chafing precautions are made during wiring and instal-
lation.
2.4 Cable Harness Wiring
Referring to the Appendix, assemble a wiring harness as required for the installation. 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.
2.4.1 Noise
Due to the variety and the high power of radio equipment often found in today's general
aviation aircraft, there is a potential for both radiated and conducted noise interference.
Ground loop noise occurs when there are two or more ground paths for the same signal
(i.e., airframe and ground return wire). Large cyclic loads such as strobes, inverters, etc.,
can inject noise signals onto the airframe that are detected by the audio system. Follow the
wiring diagram very carefully to help ensure a minimum of ground loop potential. Use
only Mil Spec shielded wires (MIL-C-275000, or better).
Radiated signals can be a factor when low level audio signals are "bundled" with current
carrying power wires. Keep these cables physically separated.