User Manual MCx-B-xxxAx-8.09
Page 5 of 13
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Rev.2021.7 [email protected]
OPERATION
DIP switches
The DIP switches allow you to change the
settings on your actuator. To flip a switch,
gently use a small flat-head screwdriver.
See chart on next page for DIP switch functionality.
DIP
Function
1
2
Speed:
Choose how quickly the actuator will turn the drive wheel. See p.7.
3
For external gear stage (MCH)
– not an option for battery fail-safe model
4
5
6
7
8
Turns:
The actuator usually ships from the factory with the recommended number of turns for the
valve. However, this number can be changed. Turning on a switch will add a specific number of
turns to the actuator’s movement.
See p.6 for relation between positions of the DIP switches and number of turns.
Example: Turning on DIP 6 adds four turns, turning on DIP 8 adds one turn. If both DIP 6 and 8 are
on, then the total turns of the actuator would be five.
9
Signal loss:
See p.8.
10
11
Seating Torque:
Set how much torque the actuator exerts on the valve lever during the calibration
(finding valve seat) procedure. See p.7.
12
Direction/Calibration:
Toggle switch on and off while powered to re-calibrate actuator. Also sets
direction in which the actuator will open and close. See p.8.
Example: The MCM model actuator turns clockwise when the signal is decreased with DIP 12 in the
OFF position. Putting DIP 12 in the ON position will cause counterclockwise turning for a decrease
in signal. For changes in DIP 12 position to take effect, the power to the actuator must be cycled.
When cycling the power, the power must be off for at least 2 minutes to ensure the battery has
switched off.
Controlling the Actuator
The 4-20 mA (or 1-5 V / 1-10 V) input signal represents a total span of a number of turns.
I.e.: If you set the number of turns to 2, then a signal of 12 mA will set the actuator to exactly 1 turn from the
fully closed position. 15 mA will give: (15-4)/16=0.6875
⇒
68.75% of 2 turns
⇒
1.375 turns from closed.
In this example DIPs 1, 2, 5 and 12 are on.
