Curtis Dyna-Fog 2742, Manual

Page: 44 / 84

POWER SUPPLY MODULE
The power regulator module takes the 12V DC battery power and converts it to
10:00 +/- .05 V DC and 5.00 +/- .12 V DC for use as references in the system. The
metering accuracy is dependent on the accuracy of the + 10 V DC supply. This
module also contains the reference amplifier which is analogous to the gallons of
gasoline remaining. An attenuator of 121:1 in the remote control box reduces the
0.9 volts to 7.5 millivolts for readout on the digital voltmeter. Pin-outs for the power
supply module are as follows:
PIN FUNCTION
1 -4V DC
2 Fuel sensor in
3 Ground
4 Fuel out
5 +12VDC
6 +5VDC
7 +12VDC
8 +10VDC
DESCRIPTION
-4 V DC in from tach decode module, usually -4.00 +/-
.15VDC.
Connects through J3 to fuel sensor (optional) located in
fuel tank, low resistance (20 ohms) corresponds to full
tank: high resistance (220 ohms) corresponds to empty
tank.
Module ground input.
Analog voltage to remote box; 0 corresponds to empty
0.9 V DC corresponds to 7.5 gallons (optional).
Power out interlock.
Reg5 V to rest of 5.00 +/- .12 volts DC.
Battery power input from machine on switch .
Reg10 V power to rest of 10.00 +/- .05
volts DC.
+ 10 VOLT OUT
+ 5 VOLT OUT
FUEL LEVEL OUT
FUEL SENSOR IN
+12 VOLT OUT
+12 V MACHINE ON
GROUND
-4 VOLT IN
REFERENCE TAB
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