Controller Provides Closed Loop For Quarter Turn Actuators

Festo introduced the CMSX, a process industry closed loop position controller for quarter turn actuators. The electro-pneumatic CMSX positioner provides proportion closed loop control for liquids, gases or any application utilizing a quarter turn actuator, in such industries as food and beverage, water/wastewater, paper manufacturing and pharmaceutical.

The unit is equipped with two digital output signals for alarms and a 4-20mA output signal that provides data on the actual position of the valve for greater overall feedback and closed loop control. For maximum energy savings, once the position of the actuator is reached, the unit goes into rest mode and air consumption drops to zero. To ensure safety, the unit can be predefined to fail in-place or in the open or closed position in the event of an electrical system failure or use of the digital input signal for emergency shutdown mode.

The CMSX is self-commissioning for simple set up and commissioning – users simply push a button. The CMSX comes standard with a teach function that makes it easy to delineate the valve’s specified range of motion. Each unit can accommodate 0-10V, 4-20mA, or 0-20mA input.

The CMSX is ideal for the multi-functional Festo DFPB quarter turn actuator. The CMSX meets the IP65 standard for dust and water protection and the ISO 5211 mounting standard. The housing is made from a technical polymer that is ideal for indoor and outdoor applications. Signal and position information is displayed via a backlit LED screen.