TruTrak Pictorial Pilot - Manual (Page 17)

Electrical Pin-out
The table below provides a brief explanation of each pin function on the main 15-pin connector P101.
1
9 10 11 12 13 14 15
2 3 4 5 6 7 8
Rear 15-Pin Connector P101
viewed from rear of unit
P101
Pin
Function Notes
1 Autopilot Master (+12 to +14 V DC). The autopilot itself draws less than 0.3 ampere. Most of
the current required by the system is used by the servo (up to 1Amp depending on torque
setting)
2 Control Wheel Switch. Connect as shown in wiring diagram to a SPST momentary switch
located remotely to the autopilot for convenient engage/disengage function.
3 Primary Serial Input. Baud rate selectable, normally 4800 or 9600 baud. Automatically
decodes NMEA-0183, Garmin Aviation Format, or Apollo/UPSAT Moving-Map format.
Provides directional reference to the autopilot.
4,5,6 Reserved. Do not connect to these pins.
7 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.
8 Ground Connection. Provide #20 AWG to common grounding point.
9 Power Connection to Servo. Provide #20 AWG to Servo Pin 1.
10 Instrument Lamp Dimmer. A source of variable DC from external dimming control module.
Drives the LED brightness control. If left disconnected, the LED display will be full-on.
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 11 Pin 12
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
11
12
13
14
Reversed J201-5 J201-4 Servo CW (clockwise) Î RIGHT
Reverse servo direction if
necessary by swapping
wires on pin 11 and 12.
See note 3 on wiring
diagram.
15 Ground Connection to Servo. Provide #20 AWG to Servo Pin 9.
TruTrak Flight Systems Pictorial Pilot Installation & User Guide
December 2009 15 8300-011 Rev B