| 摘要 |
<p>Methods and apparatus to monitor and/or control a pneumatic actuator are disclosed. An example apparatus includes a processor to execute a control application, a position sensor to monitor a position of a valve coupled to a pneumatic actuator, the position sensor to provide position information of the valve to the control application, and a latching valve to provide a pneumatic signal to the actuator, the latching valve and the pneumatic signal to be controlled by the control application based on at least one of the position information or a control signal from a separate device in a process control system.</p> |
