COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 29
Apr. 14/16
Description and Operation
23–70–04
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
Notes for Figure 9:
1.
Recommended minimum wire size is #22; however, wire size #24 is electrically permiss-
ible except for long
−
run power leads where #18 wire is recommended (pins 3, 9, & 17).
Wire resistance should not exceed 1 ohm for DC power leads and should not exceed 5
ohms for other leads. All wiring should be MIL
−
W
−
22759 or MIL
−
C
−
27500.
2.
If 115 VAC, 400 Hz is supplied, connection is to be made to pins 2 & 1. If 28 VDC is sup-
plied, connection is to be made to pins 9 and 3.
3.
Recorder Chassis ground connection to be within 1 foot of pin 17, with heavy gauge wire.
Shields to be grounded at the recorder using short connections. Note that Pin 3 is used as
+28 VDC return. Control unit may be grounded in the cockpit to a local chassis ground.
4.
Record enable 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 used for DC power return and is not connected to chassis ground within the re-
corder. (see Note 3). Pin 1 is used for AC power return and is not connected to chassis
ground within the recorder. All power input and return pins (2 & 1, 9 & 3), are galvanically
insulated from the conductive chassis ground connection.
6.
The Control Unit pre-amp attenuation program pins are not used.
7.
Twisted shielded cable. Shields to be grounded at the airframe using short connections.
Tie shields to existing single point GND used for Pin 17. (see Note 3)
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 2100
−
1X27
−
( ) 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 recorder accepts both label 150 (1 sec resolution) and label 125
(0.1 min. resolution) for 429 GMT inputs. If both are present, label 150 will be used. Any
FSK input will be used only if there is no valid ARINC 429 GMT input.
13.
External microphone connections to control unit.
14.
Data Link and OMS input and output signals are applicable to p/n: 2100
−
1X27
−
( ). When
data link valid (pin 56) is grounded and data link communications (pins 32 and 34) are re-
ceiving data, then ARINC
−
429 label 350/352 Bit 16 will be set at zero = good
15.
Control Unit front panel illumination control.
16.
Data Link Fault = Open/Ground discrete, Asserted is Open.
17.
Pin 44 may be used to inhibit audio download when pins 7 and 8 are not jumpered and is
applicable to p/n: 2100-1X27-( )
.
The document reference is online, please check the correspondence between the online documentation and the printed version.
