SGI-8 rev. C
SIGNAL INTERFACE UNIT
This unit can recalibrate an ignition system tachometer signal.
Wiring:
PWR -
12 volt accessory power
GND -
ground
Sig. In -
Ignition system tach signal
(negative side of coil or tach output)
OUT1 -
high voltage output for some tachometers
OUT2 -
standard output to tachometer
OUT3 -
not used
OUT4 -
not used
OUT5 -
not used
If OUT2 does not drive your tachometer, try using OUT1.
Switch settings:
1
switch ON
OFF
#1
ECM tach signal
Standard tach signal
#2
Standard tach signal Low volt tach signal
#3
#4
4 cyl gauge
Off
Off
6 cyl gauge
Off
On
8 cyl gauge
On
Off
10 cyl gauge
On
On
Tach input
signal
standard tach output signal
high voltage output signal
SGI-8 C
Dakota Digital
TACHOMETER SIGNAL INTERFACE
PW
R
GN
D
Si
g. In
OUT1
OUT2
OUT3
OUT4
OUT5
GROUND
12 volt accessory
power
#1 Input Type
#2 Sensitivity
#3 Gauge cyl
#4 Gauge cyl
Setup and diagnostic lights
RED
GREEN
Status
OFF OFF
Power
off.
OFF
ON
Power on, no tach signal present
OFF
Flashing
Power on, tach signal present
ON
Flashing
Engine cylinder calibration adjustment mode
ON
ON
UP switch is being held to preset cal
ON
OFF
DN switch is being held to enter setup mode
