M9220-GGx-3 Proportional Electric Spring Return Actuators Installation Instructions
10
Setup and Adjustments
Direction of Action
The M9220-GGx-3 Proportional Electric Spring Return
Actuators are factory set for Direct Acting (DA)
operation. In DA mode, applying an increasing input
signal to the control input drives the actuator away from
the spring return position. Reverse Acting (RA)
operation is also available. In RA mode, applying an
increasing input signal to the control input drives the
actuator toward the spring return position. Figure 12
and Figure 13 indicate how the drive direction for the
actuator depends on the spring return direction and the
position of the mode selection switch.
Mode Selector Switch and CAL Function
The M9220-GGx-3 Proportional Electric Spring Return
Actuators are factory set at Direct Acting (DA), DC 0 to
10 V control input (Figure 13). To change to RA
operation, move the mode selection switch from DA to
RA
.
The DC input signal is selectable from
DC 0 to 10 V or from DC 2 to 10 V, which corresponds
to 0 to 90° rotation. If the rotation range is reduced, the
end-stop is reached with a reduced input signal. For
example, if a DC 0 to 10 V input signal is selected and
the rotation range is limited to 75°, the end-stop is
reached at DC 8.3 V. If an external 500 ohm resistor is
placed across the input (see Figure 10), the switch
positions then select between 0-20 mA or 4-20 mA.
The CAL function enables the actuator to redefine the
selected control input range proportionally across a
reduced rotation range. The actuator stores the
reduced rotation range in nonvolatile memory (retains
data when power is lost or removed).
To calibrate the control input range, proceed as follows:
1.
With power off, move the mode selection switch to
the CAL position (Figure 13). Then, energize the
actuator. The actuator automatically rotates until
the end-stops are found, and proportionally
reconfigures the control input range to the reduced
rotation range.
2.
Return the mode selection switch to the desired
selection (example: DA, 0 to 10 VDC control input).
Note:
During normal operation, if the actuator
stroke increases due to seal or seat wear, the input
is redefined to the increased rotation range in
approximately 0.5° increments.
3.
If the actuator mounting position is changed or if
the linkage is adjusted, repeat Steps 1 and 2 to
reinitiate the CAL function.
Note:
To repeat calibration with power applied, move
the mode selection switch out of the CAL position for at
least 2 seconds before returning it to the CAL position.
Auto calibration begins 5 seconds after you return it to
the CAL position.
Figure 12: Nominal Feedback Signal Relative to
Rotation Position
A
B
Control Inputs
CCW Face
of Actuator
CW Face
of Actuator
DA
RA
DA
RA
Mode Selection
Switch Setting
Increasing Signal
Decreasing Signal
F
IG
:D
R
V
P
O
S
Rotation Position
0-10V
Direct
Acting
Reverse
Acting
0-10V
0° is the spring return position.
*
Feedback
Direction
0.0V 1.7V 3.3V 5.0V 6.7V 8.3V 10.0V
10.0V 8.3V 6.7V 5.0V 3.3V 1.7V 0.0V
2-10V
2.0V 3.3V 4.7V 6.0V 7.3V 8.7V 10.0V
2-10V
10.0V 8.7V 7.3V 6.0V 4.7V 3.3V 2.0V
Figure 13: Mode Selection
modes
el
Side A of Actuator
Side B of Actuator
RA
DA
DA
2-10
0-10
0-10
2-10
+
+
CAL
2-10
0-10
0-10
2-10
+
+
CAL
2-10
0-10
0-10
2-10
+
+
CAL
RA
