Danfoss PVE 7 Series, Техническая информация

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PVE-EX warnings
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Warning
All brands and all types of directional control or proportional valves, which are used in many different
operation conditions and applications, can fail and cause serious damage.
Analyze all aspects of the application. The machine builder/system integrator alone is responsible for
making the final selection of the products and assuring that all performance, safety and warning
requirements of the application are met.
The process of choosing the control system and safety levels is governed by the machine directives EN
13849 (Safety related requirements for control systems).
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Warning
The installation must be performed as intended in order to have a safe system and a proper functional
application. In a case of damage to enclosure, plug or cable, the PVE-EX module must be replaced. Please
refer to the information in this manual for an assistance, or consult with a professional.
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Warning
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Not applying to the Operational Conditions can compromise safety.
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A PVG with PVE-EX can only perform according to description if conditions in this Technical
Information are met.
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In particularly exposed applications, protection in the form of a shield is recommended.
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When the PVE-EX is in fault mode the quality of performance and validity of feedback is limited
depending on the fault type.
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Error pins from more PVE-EX’s may not be connected. Inactive error pins are connected to ground
and will disable any active signal. Error pins are signal pins and can only supply very limited power
consumption.
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After replacement of modules or cables wiring quality must be verified by a performance test.
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By actuation at voltage below nominal PVG will have reduced performance.
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The PVE-EX is not designed for use with voltage outside nominal.
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Obstacles for the Pilot oil can have direct influence on spool control.
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Reduced pilot oil pressure will limit spool control.
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Too high pilot oil pressure can harm the PVE-EX.
Technical Information
Electrohydraulic Actuators PVE-EX
Warnings
28 | © Danfoss | October 2017 BC00000393en-US0102