| 摘要 |
In a positioner, a control calculating portion 1 and a valve opening detecting portion) 4 are contained within a first case 10-1, and an electropneumatic converting portion 2 and a pneumatic circuit portion 3 are contained within a second case 10-2. The first case 10-1, which contains the control calculating portion 1 and the valve opening detector 4, is assembled together with the valve 300, and the second case 10-2, which contains the electropneumatic converting portion 2 and the pneumatic circuit portion 3, is located in a position away from the valve 300. A control signal MV, which is a PWM signal (a digital signal), is sent through a cable 6 from the control calculating portion to the electropneumatic converting portion. |
