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Valve positioner CMSX

The CMSX valve positioner from Festo is a digital, electropneumatic valve positioner for attachment to pneumatic quarter turn and linear actuators for a wide variety of applications in the process industry. It enables simple and efficient control of the position of process valves actuated by pneumatic actuators.
The CMSX is suitable for single and double-acting quarter turn actuators with a swivel angle of 0-100° and mechanical interface to VDI/VDE 3845.
It is also suitable for double-acting linear actuators.
The position of the CMSX is preset via an analog setpoint signal (0-10 V or 0/4-20 mA). For quarter turn actuators, the current position of the actuator is detected by a potentiometric angle sensor integrated in the valve positioner, for linear actuators by an external potentiometric travel sensor and transmitted to the valve positioner's control electronics. The controller compares the analog setpoint value with the measured value and controls the solenoid valves of the valve positioner accordingly. The solenoid valves control the actuator by aerating and exhausting the cylinder chambers until the control deviation is reduced to zero.
The control parameters are adjusted and determined fully automatically, so that the greatest possible time savings and optimum control response are achieved.
Several freely configurable functions, input and output signals make the CMSX flexible for any task.
Product options are available for the different  actuator types, flow rates and safety functions.

Accessories for valve positioners

This is a DARQ mounting adapter made of high-alloy stainless steel for direct mounting of the Festo CMSX valve positioner on quarter turn actuators with mechanical interface according to VDI/VDE 3845.
Available sizes:
- 30 x 80 x 20 mm
- 30 x 80 x 30 mm
- 30 x 130 x 30 mm