Contents
1 About this document........................................................................ 6
1.1 Function of this document....................................................................... 6
1.2 Scope......................................................................................................... 6
1.3 Target groups and structure of these operating instructions................ 6
1.4 Additional information.............................................................................. 7
1.5 Symbols and document conventions...................................................... 7
2 Safety information............................................................................ 9
2.1 General safety notes................................................................................. 9
2.2 Correct use................................................................................................ 9
2.3 Requirements for the qualification of personnel.................................... 9
3 Product description........................................................................... 11
3.1 Structure and function............................................................................. 11
3.1.1 System requirements.............................................................. 12
3.1.2 Safety by means of Flexi Loop................................................ 12
3.1.3 Subdivision of the safe sensor cascade................................ 13
3.1.4 Supply of power....................................................................... 14
3.2 Principle of operation............................................................................... 15
3.2.1 Operating principle of Flexi Soft............................................. 15
3.2.2 Operating principle on Flexi Classic........................................ 17
3.2.3 Protection against tampering.................................................. 20
3.3 Device components.................................................................................. 20
3.3.1 Flexi Loop node........................................................................ 20
3.3.2 Flexi Loop terminator............................................................... 22
3.3.3 Flexi Loop accessories............................................................ 22
3.3.4 Status indicators...................................................................... 24
4 Design................................................................................................. 27
4.1 Total current.............................................................................................. 27
4.1.1 Permissible total current of a section.................................... 27
4.1.2 Permissible inrush current...................................................... 27
4.1.3 Other limits............................................................................... 27
4.1.4 Connection facilities................................................................ 28
4.1.5 Division into sections............................................................... 30
4.2 Voltage drop via cables, Flexi Loop nodes and Flexi Loop accessories 31
4.2.1 Examples for the voltage drop................................................ 31
4.2.2 Possible solutions.................................................................... 34
4.3 Supply of OSSD devices........................................................................... 34
4.4 Integration in the electrical control......................................................... 34
4.4.1 Implementation of reset.......................................................... 34
4.4.2 Implementation of a safety locking device............................ 36
5 Installation and mounting................................................................ 40
CONTENTS
8015836/YT10/2016-05-24 | SICK O P E R A T I N G I N S T R U C T I O N S | Flexi Loop
3
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