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1 Preliminary note
Technical data, approvals, accessories and further information at www�ifm�com�
1.1 Notes on this document
This document applies to devices of the type "vibration sensor" (art� no�: VNB211)�
It is part of the device and contains information about the correct handling of the
product�
This document is intended for qualified electricians� These specialists are people
who are qualified by their training and their experience to see and to avoid
possible hazards that may be caused during operation of the device�
► Read this document before using the device�
► Keep this document during the service life of the device�
1.2 Symbols used
► Instructions
> Reaction, result
→ Cross-reference
LED on
LED flashes
Important note
Non-compliance may result in malfunction or interference�
Information
Supplementary note
2 Safety instructions
2.1 General
► Observe these operating instructions�
► Observe the warning notes in these instructions�
Non-observance of the instructions, operation which is not in accordance with use
as prescribed below, wrong installation or incorrect handling can affect the safety
of operators and machinery�
2.2 Installation and connection
The device must only be installed, connected and put into operation by a qualified
electrician as the safe function of the device and machinery is only guaranteed
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