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The valve control module VAEM makes precise switching of solenoid valves easier than ever. Up to 8 channels can be parameterised individually. A temporary resolution of only 0.2 ms and the control of the valves via current – not voltage – enable extremely high preci­sion, e.g. for dispensing applications. The holding current reduction saves energy and minimises heat input.

• Use, storage and transport conditions for Festo products
• Standards in pneumatics
• Compressed air preparation
• Operating conditions for valves
• Port designations of pneumatic components to ISO 5599
• Operating conditions for drives
• Pressure/force table and graphBuckling load graph
• Air consumption
• Pneumatics and explosion protection – ATEX
• EC directives/approvals
• Design – Clean room suitability
• Paint-wetting impairment substances and resistance to media
• Corrosion resistance class CRC
• Protection classes according to IEC/EN 60529
• Functional earth – protective earth – PELV
• Spark arresting

On/off process valves can be automated in different ways using pneumatics. This white paper looks at automation using an individual valve, a valve terminal and a digital valve terminal, and compares the three actuation methods in terms of:

• Required hardware/components and the installation

effort involved

• Investment costs

• Potential for compressed air savings and increased

energy efficiency

• Diagnostic and maintenance options

• Potential for function integration

• Possible applications in safety-related circuits

• Possible applications in potentially explosive areas

When valve terminals are used, short-circuit and short-circuit detection of the safe output modules of the Siemens ET 200 SP may result in diagnostic interrupts. These diagnostic interrupts can lead to the fact that an operation is not possible. This technical report explains the background and suggests possible solutions.