TruTrak EFIS (8300-056) - Manual (Page 13)

TruTrak Flight Systems 11 EFIS Installation Manual
February 2009 8300-056 Rev B
Electrical Pin-out
The table below provides a brief explanation of each pin function on the main 37-pin connector P101.
P101 EFIS Rear Connector (Viewed from rear of EFIS) or wire side of connector.
P101
Pin
Function Notes
1 Dedicated ground connection for Pitch Reverse Jumper. EFIS autopilot only
2 Pitch Reverse Jumper Direction of servo arm / capstan rotation EFIS autopilot only
3 SL-30 RS-232 OUTPUT.
4 BUTTON DIMMER connection
5 NO CONNECTION
6 NO CONNECTION
7 ALERT Not used at this time
8 NO CONNECTION
9 Not used at this time
10 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.
EFIS autopilot only
11 Pitch Servo Trim Sensor. A signal from the pitch servo to the autopilot which indicates an
out-of-trim condition and its direction.
EFIS autopilot only
12 AIRCRAFT POWER (+12 to +28 V DC). The EFIS itself draws less than 3 ampere.
13 Audio signal Out. This pin may be wired to an unswitched input of an audio panel. The
autopilot uses various voice or tones to denote specific events (loss of GPSS, capture
Glideslope, etc). Volume is adjustable within a setup screen of the autopilot.
14
15
16
17 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. EFIS autopilot only
18 AOA Not used at this time
19 GROUND CONNECTION. Provide #20 AWG to common grounding point.