Model FA2100 CVR
Instruction Manual
Installation & Operation
Rev. 07
Jan. 01/03
165E1846–00
Page A–19
Notes for Figure A–12:
1.
Recommended minimum wire size is #22; however, wire size #24 is electrically permissible
except for long-run power leads where #18 wire is recommended (pins 2, 3, 9, & 17)
.
Wire
resistance should not exceed 1 ohm for power leads and should not exceed 5 ohms for signal
leads. All wiring should be MIL–W–22759 or MIL–C–27500.
2.
Only one power source is to be wired per aircraft. If 115 Vac, 400 Hz is supplied, no connec-
tion is to be made to pin 9. If 28 Vdc is supplied, no connection is to be made to pins 2 & 3.
Shorting pins 1 & 2 is optional.
3.
Single ground point. Ground connection to be within 1 foot of pin 17, heavy gauge wire.
4.
Jumper in aircraft connector. Without this jumper, the unit will not record or erase previously
recorded information, bulk erase will not activate, and test will indicate NO–GO.
5.
Pin 3 is not a DC return and is not grounded in the recorder.
6.
Pins p, q, and r may be jumpered. The control unit does not use these pins.
7.
Twisted shielded cable. Shields to be grounded at the recorder using short connections.
8.
If the power source has battery back-up, a means for terminating recording after a crash
should be included in the aircraft wiring. Grounding pin 10 terminates recording within 10
minutes.
9.
BITE status output: ground = no fault, open = fault or CVR not installed.
10.
Audio input .05 Vrms – 3 Vrms maximum. (1Vrms nominal).
11.
Per FAA Action Notice A8300.56 dated Jan. 24, 1990, the wiring to Channels 1 and 3 may be
transposed; that is, Channel 1 will be Pilot and Channel 3 will be Third Crew Member or PA
System.
12.
In the Model A200S, this option is not available.
In the Model FA2100, 2100–1010–( ) and 2100–1020–( ) configurations GMT is inputted as
low speed (12.5 kbps) ARINC-429 to pins 25 and 26. In addition, the –02 versions can also
accept GMT as an FSK signal combined with the audio input signals on either Channel 1 or
Channel 3. In all CVR configurations, the 205E1849–( ) Audio Compressor card provides
both 150 (1 sec resolution) and 125 (0.1 min. resolution) for 429 GMT inputs.
