ID: 3588

Positioning and SIL: what goes together, grows together

Smart positioner CMSH from Festo with HART communication

Dosing, mixing, filling – the number of control applications in the process industries is steadily growing and demands high-performance positioners for process valves. Nowadays, extensive diagnostic options such as a pressure-assisted partial stroke test are vital for reliable operation. The new positioner CMSH from Festo for single-acting and double-acting actuators is therefore the perfect highly dynamic, low-wear positioning system for linear and rotary movements. Its 2-wire technology supports HART communication and condition monitoring functions.

The positioner CMSH is suitable for a broad range of applications for large and small actuators thanks to its high air flow rate. It is characterised by low internal air consumption, which makes it very energy-efficient. The safety functions on the CMSH are already integrated, resulting in cost savings of up to 30%. It offers extensive integrated functions for self-monitoring and diagnostics with clear recommendations for action. This includes numerous standard diagnostic options such as position monitoring and counters for control interventions and positioner changes.


Integrated pressure sensors also enable intelligent diagnostic functions like continuous monitoring of the break-away pressure of a process valve. The positioner can be used at ambient temperatures from -40 to 80°C. This makes it the perfect positioning system for applications in the chemical industry, in mining and mineral processing as well as in the fields of energy, biotech, pharmaceuticals, cosmetics, water and bulk goods.


Easy to operate

The positioner CMSH is user-friendly and easy to operate thanks to its large and rotatable plain-text display that can be read from various directions. The setup wizard makes it easy to commission. As part of this process, a fast or robust control mode can be selected. The device condition can be read off at a glance directly on the local display based on status feedback to NE107.


Classic installation or integrated air routing

There are two ways in which it can be installed directly on the actuator: in addition to  the classic installation using a mounting adapter to VDE/VDI 3845-1 with external piping, it can also be installed easily and securely with integrated air routing to VDE/VDI 3847-2 either using the connection block DADG-FM-F9-… or the pneumatic adapter of the VTOP, the pneumatic extension modules from Festo for easy and flexible integration of additional functions. The integrated air routing eliminates the need for external piping. This reduces the susceptibility to leakages to a minimum. These variants also offer the possibility of attaching additional instruments like a pilot valve, volume booster or filter regulator.


Savings of up to 30% with integrated safety functions

For the first time, control and safety functions are implemented within the positioner. Both functions are realised via two completely independent, separate microcontrollers for control and safety. Safety-related digital and analogue inputs enable reliable switching of the process valve in combination with the integrated pilot valve. In addition, the internal self-test guarantees the cyclical monitoring of the safety function. This makes the CMSH suitable for use in safety-related systems up to and including SIL 2. There is no need for an additional solenoid valve with external piping for the emergency shutdown (ESD) functionality. The CMSH is easy to integrate into existing, safety-related  installations.

费斯托 (Festo)是一家全球性的独立的家族企业,总部位于德国埃斯林根。自成立以来,Festo在工业自动化技术和技术教育方面制定标准,从而为环境、经济和社会的可持续发展做出贡献。公司为超过35个行业的30万家工厂和过程自动化客户提供气动和电驱动自动化技术解决方案,其中生命科学和实验室自动化业务受到越来越多的关注。Festo产品和服务遍布176个国家。2023年,费斯托在全球61个国家的250多个分支机构拥有约20600名员工,实现销售额36.5亿欧元。每年约7%的销售额用于研发。在这家学习型企业,1.5%的销售额用于基础和进一步培训。Festo 教学培训 (Didactic SE) 是全球领先的技术教育和培训供应商,为全球客户提供工业环境中全面的数字化和常规学习解决方案。

© Festo SE & Co. KG
CMSH positioner
The new 2-wire positioner CMSH with HART communication from Festo.
© Festo SE & Co. KG
CMSH positioner on quarter turn actuator with VTOP
Easy and safe installation of the CMSH on the actuator with VTOP with integrated air supply to VDE/VDI 3847-2. This eliminates the need for external piping and significantly reduces the susceptibility to leakages.