Sun Yeh Electrical OM Series - Page 32

Quarter -Turn Electric Valve Actuator【OM Series】 Sun Yeh Ele. Ind. Co., Ltd. | 2021.11
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c. Setting of fail position when input signal fails (Switches 6 - 8)
The input signal type is set by switches 1 and 2. And switch 6 is used to set the
corresponding relationship between value of input signal and operation direction of
actuator.
When S6 is set to ON
 The program defines 20 mA / 5 V/ 10 V as a command for fully-closed positioning. The
line graph below shows the signal level and the corresponding position of the actuator.
 When a low signal value received, the actuator operates toward fully-open position and
when a high signal value received, the actuator operates toward fully-closed position.
 The selection of the fail position while the input signal failed, please follow table below:
Signal Failed Position
State of Switch
Fully-Open ( 90°)
7 at OFF, 8 at ON
Fully-Closed ( 0° )
7 at ON, 8 at OFF
The Last Position
7 at ON, 8 at ON
Input Signal
Fully-Open ( 90°)
Fully-Closed ( 0° )
4 - 20 mA
4 mA
20 mA
1 - 5 V
1 V
5 V
2 - 10 V
2 V
10 V