TruTrak EMS BU (8300-065) - Manual (Page 17)

TruTrak Flight Systems 15 EMS Installation Manual
JUNE 2009 8300-065 Rev D
EMS ELECTRICAL PIN-OUT
The table below provides a brief explanation of each pin function on the main 37-pin connector J1.
J1 EMS Rear Connector (Viewed from rear of EMS) or wire side of connector.
J1 Pin Function Notes
1 Dedicated ground connection for Pitch Reverse Jumper. EMS autopilot only
2 Pitch Reverse Jumper Direction of servo arm / capstan rotation EMS autopilot only
3 SL-30 output. SL-30 NAV pin 4 RX
4 DIMMER (buttons) connection
5 NO CONNECTION
6 NO CONNECTION
7 ALERT Not used at this time
8 NO CONNECTION
9 AUX 2 RS-232 IN 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.
EMS 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.
EMS autopilot only
12 AIRCRAFT POWER MAIN BUSS
(+12 to +28 V DC).
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.
Not used at this time
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. EMS autopilot only
18 Not used at this time
19 AIRCRAFT GROUND CONNECTION
.