Curtis Dyna-Fog 2742, Manual

Page: 45 / 84

MOTOR CONTROL MODULE
The motor control module receives a command from the rate potentiometer
located on the remote control box and generates a variable pulse width
command to the formulation motor. The command signal is added to the feed
back signal generated by the tachometer decode circuit and a difference
amplified drives the variable pulse width generator.
This module also contains the circuits needed to operate the fault indicator in
the remote control box and to provide the voltage to open the 3-way solenoid
valve. Pin outs for the motor control module are as follows:
PIN FUNCTION DESCRIPTION
1 System ground in Provides ground to module from system
2 Rate command Command voltage from potentiometer in remote control
box.
Ground to voltage regulator.
+5.00+/-.12VDC.
Ground to remote control box.
3 Ground
4 +5 V DC
5 Ground
FAULT OUT
OUT TO LOW OVERRANGE
GROUND TO TAC & SPEED
COMPOSITE FAULT INPUT
CONTROL ON COMMAND
RATE FEEDBACK
+ 5 VDC INPUT
RATE COMMAND
NOT USED
+12 VDC INPUT
NOT USED
LOW RATE IN
LOW RATE OUT
GROUND TO REMOTE
GROUNG TO REG.
SYSTEM GROUND IN
REFERENCE TAB
45