CMSX-...-C-U-F1-...
8 Festo – CMSX-...-C-U-F1-...– 1506a English
2 Features
Feature Type code Specification
Type CMSX Positioner for process automation
Design SPositioner, path/angle measurement integrated
SE Positioner, path/angle measurement external
Display type CLCD, backlit
Setpoint value UConfigurable (0 …10 V , 0 ... 20 mA, 4 … 20 mA)
Position feedback F1 4 … 20 mA
Function DDouble-acting
SSingle-acting
Standard nominal flow rate 50 50 l/min
130 130 l/min
Safety function AOpen or close in case of breakdown1)
CMaintain position2) in case of breakdown1)
1) Failure of the operating voltage supply
2) Block air for semi-rotary drive on both sides
Tab. 1 Type code CMSX (e.g. CMSX-S-C-U-F1-D-50-A)
3 Function and application
The positioner is intended for position control of pneumatic semi-rotary drives and double-acting linear
drives in process automation systems.
The product is intended for use in industrial environments. Outside of industrial environments, e.g. in
commercial and mixed-residential areas, actions to suppress interference may have to be taken.
Appropriate for operation are drives with a mechanical interface in accordance with VDI/VDE Direct
ive 3845. Appropriate mechanical mounting adapters are required for mounting (accessories
èwww.festo.com/catalogue).
The CMSX enables simple and efficient position control based on the PID control algorithm. Positions
are specified via an analogue setpoint signal (0 V … 10 V or 0 mA … 20 mA or 4 mA … 20 mA). The integ
rated potentiometer senses the current position of the drive and forwards the measured value to the
internal regulator. The regulator compares the setpoint value specified by analogue means to the
measured value and actuates the internal valves accordingly by means of pulse-width modulation
(PWM).
