Installation Manual
For
8300-013 Rev C
Automatic Pitch Trim
TRUTRAK FLIGHT SYSTEMS
1500 S. Old Missouri Road
Springdale, AR 72764
Ph: 479-751-0250 Fax: 479-751-3397
www.trutrakap.com
IT IS THE INSTALLERS RESPONSIBILITY TO ENSURE THAT THE TRIM SYSTEM DOES NOT EXCEED THE ABILITY OF THE PILOT TO CONTROL THE AIRCRAFT AT ANY SPEED WITH THE TRIM TAB AT FULL DEFLECTION IN EITHER POSITION.
IF UNABLE TO MAINTAIN FLIGHT CONTROL WITH THE TRIM TABS AT FULL DEFLECTION THEN STOPS WILL BE NEEDED IN THE AIRCRAFT TRIM SYSTEM.
Table of Contents
Electrical Pin-Out................................................................................................................. |
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1 |
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Automatic Pitch Trim Ground Checkout.......................................................................... |
2 |
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Retrofit to existing autopilot harness ................................................................................. |
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3 |
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Pitch Auto Trim Block Diagram......................................................................................... |
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3 |
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Roll Auto Trim Block Diagram .......................................................................................... |
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4 |
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28 Volt Aircraft with 12 Volt Trim System ....................................................................... |
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Manual Auto Trim Switching ............................................................................................. |
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5 |
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Trouble Shooting.................................................................................................................. |
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5 |
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RETURN MERCHANDISE POLICY |
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6 |
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Revision |
Date |
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Discription |
Pages |
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C |
12/22/2009 |
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New auto trim module |
All |
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Electrical Pin-Out
The table below provides a brief explanation of each pin function on the 25-pin connector P101.
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1 |
2 |
3 |
4 |
5 |
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6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
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25-Pin Connector P101 |
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14 |
15 |
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16 |
17 |
18 |
19 |
20 |
21 |
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22 |
23 |
24 |
25 |
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P101 Pin |
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Function |
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Notes |
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1 |
No Connection. Reserved for future expansion. |
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2 |
No Connection. Reserved for future expansion. |
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3 |
Pitch Servo Trim Sensor. Pitch servo trim sensor output to autopilot programmer. |
@2.5 v AP engaged no load |
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4 |
Pitch Servo Trim Sensor. Pitch servo trim sensor input from pitch servo pin 7. |
@2.5 v AP engaged no load |
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5 |
Torque Control. Pitch servo torque control input from autopilot programmer. |
@5 volt, AP engaged |
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6 |
Torque Control. Pitch servo torque control output to pitch servo. |
@5 volt, AP engaged |
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7 |
No Connection. Reserved for future expansion. |
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8 |
Trim Switch 1. Line 1 to existing trim switch. |
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9 |
Motor 1. Line 1 to existing trim servo motor. Will not control relays |
Voltage in @max 5 amps |
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10 |
Motor 2. Line 2 to existing trim servo motor. Will not control relays |
Voltage in @max 5 amps |
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11 |
Trim Switch 2. Line 2 to existing trim switch. |
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12 |
Power. Connects to autopilot master or pitch servo power line from programmer. |
11 – 35V input |
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13 |
Power. Connects to pitch servo pin 1. |
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14 |
Ground. Ground connection to link sensor. |
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15 |
Ground. Connect to aircraft ground. |
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Aircraft ground |
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16 |
Ground. Ground connection to pitch servo pin 9. |
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17 |
No Connection. Reserved for future expansion. |
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18 |
PH1P. Servo drive line output to pitch servo pin 3. |
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19 |
PH1P. Servo drive line input from programmer |
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20 |
PH1N. Servo drive line output to pitch servo pin 2. |
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21 |
PH1N. Servo drive line input from programmer |
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22 |
PH2P. Servo drive line output to pitch servo pin 5. |
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23 |
PH2P. Servo drive line input from programmer |
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24 |
PH2N. Servo drive line output to pitch servo pin 4. |
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25 |
PH2N. Servo drive line input from programmer |
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The Auto Trim controller MUST be wired directly to the aircraft trim motor. If the aircraft manual trim system uses a relay system the Auto Trim connects on the motor side of the relay system.
Total Weight |
Voltage |
Current |
Trim Motor Output |
.5 LB |
11 V – 35 V |
.25 A – 5 A |
Input voltage / 5 Amps |
Auto Trim Installation Manual |
1 |
TruTrak Flight Systems |
December 2009 |
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8300-013 Rev C |
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