Table of Contents
Advertisement
DESERT AIRCRAFT OWNER'S MANUAL HFEDCN0054 Rev G
Pin
Signal
1
NC
2
PUMP SIGNAL
3
NC
4
NC
5
GND
6
PUMP (+)
7
TACH OUT
8
PUMP (-)
9
THROTTLE SIGNAL
10
GND
11
ENABLE
(Special feature
available on request)
12
GND
13
MAIN GND
14
POWER 12V
a. ECM Blink Patterns:
If the engine is not starting, checking the STATUS light on the top of the ECM can signal what
problem is seen by the ECM. The pattern repeats after 3 second pause, and blinks at 1 to 2 Hz.
# of Blinks
1
2
3
5
This Document is not controlled when printed. See HFE "Released Documents" folder on server for latest revision,
Description
Not Connected (RS-232 level Tx)
Variable voltage output from fuel pump assembly.
Not Connected (RS-232 level Rx)
Not Connected
Crank signal output ground reference
Fuel System power (routed internally from system power pin
14 and enabled by a high side driver (relay) from ECM state
commands).
+5V logic-level digital output. This pin has a maximum
continuous load of ±20mA. Output signal has a 50% duty cycle.
Fuel system ground reference.
Throttle position with logic-level input. A Pulse Width
Modulated (PWM) signal at nominally 50Hz with ON time
ranging from 900µs to 2100µs corresponding to throttle
position (0% to 100%). This pin has an 8mA draw.
Throttle input ground reference.
Engine enable signal from AP. A 5 volt signal present to enable
(UAV option only). This pin has an 8mA draw. 10k pull down
resistor.
Enable ground reference
Main Ground
Main power input. 10 to 14 volts. Maximum power draw is 12
W at wide open throttle. (11.1v 3 cell LiPo 2000ma or bigger)
Table III: ECM Input Connector 14 Pin
Issue
High battery disconnected
MAT disconnected/no signal
CHT disconnected/no signal
Pulse train (throttle) not active
Table IV: Blink Patterns
14
or contact HFE International.
Advertisement
Table of Contents
