TruTrak DFC Install Manual - Manual (Page 6)

DFC Autopilot Installation Manual TruTrak Flight Systems
May 2006 Printing 4
Autopilot Rear Connections to P101 (Continued)
P101
Pin
Function Notes
23 GS DOWN
24 GS UP Analog +/- 150 mV differential signals from Glideslope receiver. Pin 24 more
positive than pin 23 indicates GS needle above center.
25 Primary Serial Input. Baud rate selectable 1200, 2400, 4800 or 9600 baud. Automatically
decodes NMEA-0183, Garmin Aviation Format, or Apollo/UPSAT Moving-Map or GPSS
format. Provides directional reference to the autopilot.
26 ARINC-A
27 ARINC-B Digital differential signals from Garmin, Sierra, or other panel-mount receiver
which provide directional steering commands (GPSS) to autopilot
28 Roll Servo Torque Control. A signal from the autopilot to the roll (aileron) servo which sets
the amount of torque to be delivered by the servo.
29 Localizer mode signal. When floating or at power supply potential, the autopilot will assume
CDI signal represents a VOR deviation. When grounded, the autopilot will assume that CDI
represents a localizer signal with different flight dynamics, and in addition will allow coupling
to the glideslope as well for an ILS approach. Some Nav receivers refer to this as the “ILS
Energize” function.
30 Auxiliary RS-232 Input. Presently unused, intended for future expansion.
31 No Connection. Reserved for future expansion.
Roll (aileron) Servo control lines. These lines cause the stepping motor in the roll servo to run
in the appropriate direction at the desired velocity. They are small-signal lines and do not have
any substantial current-carrying capability or require any special shielding. Connect to roll
servo as shown on wiring diagram.
Wiring to roll servo J201
J101 Pin 32 Pin 33
Direction of servo arm / capstan rotation
(as viewed from face of the servo body)
for RIGHT aileron
Standard J201-4 J201-5 Servo CCW (counter-clockwise) Î RIGHT
32
33
34
35
Reversed J201-5 J201-4 Servo CW (clockwise) Î RIGHT
Reverse servo
direction if necessary
by swapping wires on
pin 32 and 33. See
note 3 on wiring
diagram.
36 No Connection. Reserved for future expansion.
37 No Connection. Reserved for future expansion.
Specific connections for certain commonly-used in-panel GPS units
Note that the information in the tables is based upon the best information available from each manufacturer’s documentation at
the time of publication. Please consult the appropriate installation manual for confirmation of wiring information.
Garmin 430 and 530 connections to TruTrak autopilot
P4001 [P5001] on
Garmin 430 [530]
Signal Name
(Garmin)
Signal Name
(TruTrak)
P101 on
TruTrak Autopilot
21 MAIN +LEFT CDI LEFT 21
22 MAIN +RIGHT CDI RIGHT 22
27 MAIN +UP GS UP 24
28 MAIN +DOWN GS DOWN 23
56 GPS RS 232 OUT 1 Primary Serial Input 25
46 GPS ARINC 429 OUT A ARINC-A 26
47 GPS ARINC 429 OUT B ARINC-B 27
14 ILS / GPS APPROACH Localizer Mode 29
Garmin 430/530 setup instructions: