User Manual MCx-B-xxxAx-8.09
Page 7 of 10
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Rev.2020.3
Appendix
Changing the number of turns:
The 4...20mA (or 1
…5V) 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 12mA 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 etc.
With the DIP switch settings, you can adjust anything between 1 and 31 turns to represent the full signal range of
4.
..20mA. 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.
Speed and Torque Details:
The maximum speed of the actuator can be set
by using the first two positions of the
DIP switch selector
.
As a result of this setting, the actuator will limit the maximum speed. The tables below show the maximum torques
that can be expected at the given maximum speeds.
The torque available also depends on the voltage provided in the power connection and on the seating power
settings on DIP 10, 11 as shown below.
Speed and Torque of MC
L
-B-xxxAx Actuators
NOTE
: If actuator is MC
J
-B-xxxAx, divide torque values by 3.
Time for
1 turn
(sec)
OFF
OFF
7
OFF
ON
3
ON
OFF
2
ON
ON
1
24VDC
48
24VDC
12
24VDC
20
24VDC
38
Torque in in-lbs
Torque in in-lbs
DIP 1
DIP 2
Torque in in-lbs
Torque in in-lbs
66% Power*
100% Power*
16% Power*
33% Power*
To convert in-lbs to Nm, divide the in-lbs value by 9
For more turns set DIP 4 as follows:
DIP 4=0
0
DIP 4=1
+16 turns
Note:
This actuator can accommodate up to the following
number of turns on its different models:
MCL-B-xxxAx 31 turns MCJ -xxxAx 31 turns
MCM-B-xxxAx 31 turns MCK -xxxAx 31 turns
MCF-B-xxxAx xx turns
This will add 16 turns
to the function of DIPs 5
to 8
Operating torque is 100%. These torque values are for valve seating.
