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The 272630D provides:
1. A 2-10 Vdc voltage proportional to the valve
stem position. This output is capable of
sourcing up to 20 mA dc drive current.
2. An isolated "Form C" relay contact closure
that energizes when the valve is open more
than the setting of the trimmer potentiometer
("trim pot").
Position feedback voltage mirrors the control
signal. For ML6984 and direct acting ML7984
operation, see Fig. 3. For reverse acting
ML7984, see Fig. 4.
STROKE
UPPER
SEAT
First and last steps
are @ 0.75V per step
LOWER
SEAT
1.75V
2.5V
Fig. 3 - Feedback voltage reponse for
ML6984 and direct acting ML7984
STROKE
UPPER
SEAT
28 steps @
0.25V per step
LOWER
SEAT
FEEDBACK VOLTAGE
1.75V
2.5V
Fig. 4 - Feedback voltage response for
reverse acting ML7984
Auxiliary Switch Setup
1. Drive actuator to desired position.
2. Adjust trimmer potentiometer ("trim pot") until
relay is energized. (On-board LED will light).
28 steps @
0.25V per step
FEEDBACK VOLTAGE
9.5V
First and last steps
are @ 0.75V per step
9.5V
10.25V
10.25V
3
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