TruTrak Yaw Damper - Manual (Page 7)

Electrical Pin-Out
The table below provides a brief explanation of each pin function on the 25-pin connector P501.
P101
Pin
Function Notes
1 Power. Connects to autopilot master or pitch servo power line from programmer. +12 or +28 V
2 Ground. Connect to aircraft ground. Aircraft ground
3 Yaw Damper Activity. A signal from the autopilot which sets the amount of response the
yaw damper exhibits to azimuth disturbances and “ball” deflection.
0 to +5v at YD
For testing only
4 Yaw Damper Leveling. A signal from the autopilot which is used for fine adjustment of
the “ball” in a yaw damper.
0 to +5v at YD
For testing only
5 Torque Control. Servo torque control output to servo pin 6 +5v at servo pin 6
For testing only
6 No Connection. Reserved for future expansion.
7 No Connection. Reserved for future expansion.
8 Yaw Damper Activate. A signal from the autopilot which turns on the yaw damper
function.
0 to engaged at YD
For testing only
9 No Connection. Reserved for future expansion.
10 PH1P. Servo drive line output to servo pin 3.
11 PH1N. Servo drive line output to servo pin 2.
12 PH2N. Servo drive line output to servo pin 4. Swap to reverse
13 PH2P. Servo drive line output to servo pin 5. Servo direction
14 Power. Power connection to pitch servo pin 1 Connected internally to
pin 1
15 Ground. Ground connection to pitch servo pin 9. Connected internally to
pin 2
16 No Connection. Reserved for future expansion.
17 Jumper to pin 18 for mounting with the connector forward
18 Jumper to pin 17 for mounting with the connector forward
19 No Connection. Reserved for future expansion.
20 No Connection. Reserved for future expansion.
21 No Connection. Reserved for future expansion.
22 No Connection. Reserved for future expansion.
23 No Connection. Reserved for future expansion.
24 No Connection. Reserved for future expansion.
25 No Connection. Reserved for future expansion.
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
25-Pin Connector P501
TruTrak Flight Systems Yaw Damper Installation Manual
December 2009 5 8300-063 Rev C