User Manual RCx-AC-xxxAx-8.09
Page 7 of 17
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Rev.2021.11 [email protected]
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.
Changing the number of turns
With the DIP switch settings, you can adjust anything between 1 and 31 turns to represent the full signal
range of 4-20
mA. Check in the table below. (1 = “On”, 0 = “Off”).
Total Turns
Dip4=0
DIP 5
DIP 6
DIP 7
DIP 8
reserved
0
0
0
0
1
0
0
0
1
2
0
0
1
0
3
0
0
1
1
4
0
1
0
0
5
0
1
0
1
6
0
1
1
0
7
0
1
1
1
8
1
0
0
0
9
1
0
0
1
10
1
0
1
0
11
1
0
1
1
12
1
1
0
0
13
1
1
0
1
14
1
1
1
0
15
1
1
1
1
WARNING
: Be sure that the number of turns the actuator is set for is
LESS
than the number of
turns for the valve. The actuator should not stop itself on a fully opened valve. It can damage the
valve, and the actuator will lose its position.
For more turns, set DIP 4 to the ON position.
This will add 16 turns to the number set by DIPs
5 through 8, as shown in the table.
DIP 4=0
+0 turns
DIP 4=1
+16 turns
