Chapter 1 Operating Instructions
WSU/WEU263
6 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8013338/YTA4/2016-03-24
Subject to change without notice
About this document
We also refer you to the SICK homepage on the Internet at www.sick.com.
Here you will find information on:
• sample applications,
• these operating instructions in different languages for viewing and printing,
• EU declaration of conformity and other documents.
1.5 Abbreviations
External device monitoring
Electro-static discharge
Electro-sensitive protective equipment
Light Emitting Diode
Output signal switching device
1.6 Terminology, symbols used
Recommendations are designed to give you some assistance in your decision-making
process with respect to a certain function or a technical measure.
Refer to notes for special features of the device.
LED symbols describe the state of a diagnostics LED. Examples:
Red The red LED is illuminated constantly.
Yellow The yellow LED is flashing.
Green The green LED is off.
Instructions for taking action are shown by an arrow. Read carefully and follow the
instructions for action.
Warning!
A warning notice indicates an actual or potential risk or health hazard. They are designed
to help you to prevent accidents.
Read carefully and follow the warning notices!
Sender and receiver
In drawings and diagrams, the symbol denotes the sender and the symbol denotes
the receiver.
The term “dangerous state”
The dangerous state (standard term) of the machine is always shown in the drawings and
diagrams of this document as a movement of a machine part. In practical operation, there
may be a number of different dangerous states:
• machine movements,
• electrical conductors,
• visible or invisible radiation,
• a combination of several risks and hazards.
Note
EDM
ESD
ESPE
LED
OSSD
Recommendation
Note
Red, Yellow,
Green
Take action …
WARNING
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