TruTrak AFS Pilot - Manual (Page 8)

TruTrak Flight Systems 8 AFS Pilot Installation/User Manual
October 2011 Rev B
Electrical Pin-out
P101
Pin
Function Notes
1 Pitch servo reversal circuit
2 Pitch servo reversal circuit Install jumper between pins 1 & 2 to reverse pitch servo
direction.
If jumper is already installed between pins 1 & 2, cut it
to reverse pitch servo direction.
3 Control Wheel Switch. Connect as shown in wiring diagram to a SPST momentary switch
located remotely to the autopilot for convenient engage/disengage function.
4 Pitch Servo Torque Control. A signal from the autopilot to the pitch servo which sets the
amount of torque to be delivered by the servo.
5 Pitch Servo Trim Sensor. A signal from the pitch servo to the autopilot which indicates
an out-of-trim condition and its direction.
6 Unused.
7 Auxiliary RS-232 Output.
8 Pitch Servo control lines. These lines cause the stepping motor in the pitch 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 pitch servo as shown on wiring diagram.
Do NOT attempt to
reverse servo direction
by swapping wires
9
10
11
12 Yaw Damper option.
13 Ground Connection. Provide #20 AWG to common grounding point.
14 ARINC-A Digital differential signals from Garmin, Sierra, or other panel-mount
receiver which provide directional steering commands (GPSS, GPSV) to
autopilot
15 ARINC-B
16 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.
17 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.
18 Auxiliary RS-232 Input. Presently unused, intended for future expansion.
19 No connection
20
21
22
23
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.
Reverse servo direction
if necessary by
swapping wires on pins
20 and 21. See note 2 on
wiring diagram.
Wiring to roll servo J201 Direction of servo arm / capstan rotation
(as viewed from face of the servo body)
for RIGHT aileron J101 Pin 20 Pin 21
Standar
d
J201-4 J201-5 Servo CCW (counter-clockwise)  RIGHT
Reverse
d J201-5 J201-4 Servo CW (clockwise)  RIGHT
24 No Connection. Reserved for future expansion.
25 No Connection. Reserved for future expansion.
Rear 25-Pin Connector P101
viewed from rear of unit 1
20 21 22 23 24 25
2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19
View of P101
Facing Rear of Programmer
DIGIFLIGHT II PINOUT DESCRIPTION, MAIN I/O CONNECTOR
P101
PIN
FUNCTION
Ground connection for Pitch Reverse Jumper. 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Pitch Reverse Jumper. See note 3 on External Wiring Diagram.
CONTROL WHEEL SWITCH
PITCH SERVO TORQUE CONTROL
PITCH SERVO TRIM SENSOR
AUTOPILOT MASTER ( +12 to +28 VDC )
AUX RS-232 OUT (FUTURE EXPANSION)
PITCH SERVO PH2N
PITCH SERVO PH2P
PITCH SERVO PH1N
PITCH SERVO PH1P
No Connection. Reserved for future expansion.
GROUND ( - )
ARINC-429 (A) INPUT
ARINC-429 (B) INPUT
ROLL SERVO TORQUE CONTROL
GPS AVIATION FORMAT OR NMEA-0183 SERIAL INPUT
AUX RS-232 IN (FUTURE EXPANSION)
AUTOPILOT POWER (INTERNALLY CONNECTED TO PIN 6)
ROLL SERVO PH2N
ROLL SERVO PH2P
ROLL SERVO PH1N
ROLL SERVO PH1P
No Connection. Reserved for future expansion.
No Connection. Reserved for future expansion.