SERIES 90 MODUTROL IV™ MOTORS
63-2631
10
OPERATION
Use Series 90 Modutrol IV Motors for standard Series 90
operation (see Table 7):
1.
Two potentiometers, one in the controller and one in the
motor, along with the motor resistor network, form a
bridge circuit. As long as the value of the controlled
medium remains at the setpoint, the circuit remains
balanced and the motor does not run.
2.
When the controlled medium value changes, the
controller potentiometer wiper moves, unbalancing the
bridge circuit.
3.
The imbalance is amplified and the microcontroller then
drives the motor in the direction necessary to correct the
controlled medium change.
4.
As the motor shaft rotates, it turns the feedback
potentiometer, rebalancing the bridge circuit, stopping
the motor.
Table 7. Modutrol IV Motor Operation.
Fig. 10. Attaching a shunt resistor to TRADELINE motors.
Table 8. Cam Arrangements.
Motor Type
Signal
Resulting Action
Non-Spring Return
or Spring Return
Open W and short
R to B
drives open
Open B and short
R to W
drives closed
Jumper R-W-B
drives to midstroke
None
drives closed
Non-Spring Return Power Loss
stops (none)
Spring Return
Power Loss
spring returns
(closed)
Motor
Inner
Cam
Outer
Cam
M9164D1009, M9174D1007
Red
Blue
M9175D1014
M9172W1004
Red
Red
ALL OTHER M9164, M9172, M9175 Blue
Red
M9161, M9171
M9184, M9194
M9185, M9186
M9484, M9494
All Other M9174
Blue
Blue
T1
T2
R
B
W
M17626