SICK Flexi Loop User manual

OPERATING INSTRUCTIONS
Flexi Loop
Safe sensor cascade hardware

Described product
Flexi Loop safe sensor cascade
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
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reserved for SICK AG. Reproduction of this document or parts of this document is only
permissible within the limits of the legal determination of Copyright Law. Any modifica‐
tion, abridgment or translation of this document is prohibited without the express writ‐
ten permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
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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
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5.1 Scope of delivery...................................................................................... 40
5.2 Mounting in a cable channel................................................................... 40
5.3 Mounting with cable tie............................................................................ 40
5.4 Mounting with C-Fix bracket..................................................................... 40
6 Electrical installation........................................................................ 42
6.1 Safety......................................................................................................... 42
6.2 Connections.............................................................................................. 42
6.2.1 Connection to Flexi Soft.......................................................... 42
6.2.2 Connection to Flexi Classic..................................................... 43
6.2.3 Connections of the Flexi Loop nodes..................................... 44
6.2.4 Connection of the Flexi Loop nodes....................................... 45
6.2.5 Connections of the EMSS Flexi Loop node............................ 46
6.2.6 Connections of the OSSD Flexi Loop node............................. 47
6.2.7 Connections of the PWRI power supply accessory................ 48
6.2.8 Connections of the MSTR1 Flexi Loop accessory.................. 48
6.2.9 Connections of the MSTR2 Flexi Loop accessory.................. 49
6.2.10 Connections of the DIAG Flexi Loop accessory...................... 50
6.2.11 Connection of Flexi Loop YCON1 and YCON2 adapters........ 50
6.2.12 Connections of the Flexi Loop YCON1 adapter...................... 51
6.2.13 Connections of the Flexi Loop YCON2 adapter...................... 52
7 Configuration..................................................................................... 55
7.1 Prerequisites............................................................................................. 55
7.2 Safety......................................................................................................... 55
7.3 Configuration of protection against tampering with the MSTR Flexi
Loop accessory......................................................................................... 55
7.4 Configuration with a standard controller................................................ 57
7.4.1 Prerequisites............................................................................ 57
7.4.2 Configuration of the hardware................................................ 57
7.4.3 Options for application design in the PLC.............................. 61
8 Commissioning.................................................................................. 67
8.1 Display sequence during switching on.................................................... 67
8.2 Commissioning using the DIAG Flexi Loop accessory or the MSTR
Flexi Loop accessory................................................................................. 67
8.3 Test notes.................................................................................................. 67
8.3.1 Thorough checks before the initial commissioning............... 68
8.3.2 Regular thorough check of the protective device by quali‐
fied safety personnel............................................................... 68
8.3.3 Daily functional checks of the protective device................... 68
9 Troubleshooting................................................................................. 69
9.1 In the event of faults or errors................................................................. 69
9.2 SICK support............................................................................................. 69
9.3 Indications of the LEDs............................................................................ 69
9.3.1 MS LED..................................................................................... 69
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9.3.2 LEDs of the EMSS Flexi Loop nodes....................................... 71
9.3.3 LEDs of the OSSD Flexi Loop nodes....................................... 72
9.3.4 LEDs of the PWRI power supply accessory............................ 72
9.3.5 LEDs of the MSTR1 Flexi Loop accessory.............................. 73
9.3.6 LEDs of the MSTR2 Flexi Loop accessory.............................. 74
9.3.7 LEDs of the DIAG Flexi Loop accessory.................................. 76
9.4 Extended diagnostics............................................................................... 77
9.4.1 Diagnostics using the MSTR2 Flexi Loop accessory............. 77
9.4.2 Test tools for the configuration............................................... 79
10 Technical data.................................................................................... 81
10.1 Data sheet................................................................................................. 81
10.1.1 Overall system.......................................................................... 81
10.1.2 All Flexi Loop nodes and Flexi Loop accessories................... 81
10.1.3 EMSS Flexi Loop node (FLN-EMSS0000105 and FLN-
EMSS1100108)....................................................................... 83
10.1.4 OSSD Flexi Loop node (FLN-OSSD1000105 and FLN-
OSSD1100108)....................................................................... 84
10.1.5 Terminator................................................................................ 84
10.1.6 PWRI power supply accessory................................................ 85
10.1.7 MSTR Flexi Loop accessory..................................................... 86
10.2 Dimensional drawings.............................................................................. 87
10.2.1 Dimensional drawing Flexi Loop node.................................... 87
10.2.2 Dimensional drawing PWRI power supply accessory............ 88
10.2.3 Dimensional drawing terminator............................................ 88
10.2.4 Dimensional drawing C-Fix bracket........................................ 89
10.2.5 Dimensional drawing MSTR Flexi Loop accessory................ 90
10.2.6 Dimensional drawing DIAG Flexi Loop accessory.................. 91
10.2.7 Dimensional drawing for Flexi Loop YCON adapter............... 91
10.3 Compatibility............................................................................................. 92
11 Ordering information........................................................................ 93
11.1 Flexi Loop node......................................................................................... 93
11.2 Flexi Loop accessories............................................................................. 93
12 Accessories........................................................................................ 95
12.1 Plug connectors........................................................................................ 95
12.2 Pre-assembled cables.............................................................................. 95
12.3 Mounting accessories.............................................................................. 96
13 Annex.................................................................................................. 97
13.1 Compliance with EU directives................................................................. 97
13.2 Checklist for the manufacturer................................................................ 98
14 List of figures..................................................................................... 99
15 List of tables....................................................................................... 101
CONTENTS
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1 About this document
1.1 Function of this document
These operating instructions contain the information that is required during the life
cycle of the safe sensor cascade.
These operating instructions are to be made accessible to all persons who work with
the safe sensor cascade.
Read these operating instructions carefully and make sure you have completely under‐
stood the contents before you work with the safe sensor cascade.
1.2 Scope
These operating instructions apply to the safe sensor cascade Flexi Loop.
These operating instructions form part of SICK part number 8015834 (all available lan‐
guage versions of this document).
In addition, the following documents contain information on the safe sensor cascade:
Document Title Part number
Operating instructions Flexi Loop in the Flexi Soft
Designer Software
8014521
Operating instructions Flexi Soft Modular safety con‐
troller Hardware
8012999
Operating instructions Flexi Soft in the Flexi Soft
Designer Configuration Soft‐
ware
8012998
Operating instructions Flexi Classic Modular safety
controller
8011562
Additional information IO-Link FLA-MSTR00002 8017450
Competence brochure Guide for Safe Machinery 8008007
Table 1: Available documents
1.3 Target groups and structure of these operating instructions
These operating instructions are aimed at the following target groups: project engineers
(planners, developers, designers), fitters, electricians, operators and maintenance per‐
sonnel.
The structure of these operating instructions is orientated on the phases of life of the
safe sensor cascade: design, mounting, electrical installation, commissioning, opera‐
tion and maintenance.
In many applications the target groups are assigned as follows to the manufacturer and
organization operating the machine in which the safe sensor cascade is integrated:
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Area of responsibility Target group Specific chapter in these operating instruc‐
tions 1)
Manufacturer Project engineers
(planners, developers,
designers)
"Design", page 27
"Technical data", page 81
"Accessories", page 95
Fitters "Installation and mounting", page 40
"Commissioning", page 67
"Checklist for the manufacturer", page 98
Electricians "Electrical installation", page 42
Operators Operator "Troubleshooting", page 69
Maintenance person‐
nel
"Troubleshooting", page 69
"Ordering information", page 93
Table 2: Assignment of target groups
1) Chapters listed here are aimed at all target groups. All target groups must follow the safety notes and
warnings in the entire operating instructions!
In other applications the operating organization is at the same time the manufacturer
of the machine — with the corresponding assignment of the target groups.
1.4 Additional information
www.sick.com
The following information is available on the Internet:
•versions in other languages
•data sheets and application examples
•CAD data of drawings and dimensional drawings
•certificates (e.g. EU declaration of conformity)
•Guide for Safe Machinery (Six steps to a safe machine)
1.5 Symbols and document conventions
The following symbols are used in these operating instructions:
Safety notes and other notes
DANGER
Indicates a situation presenting imminent danger, which will lead to death or serious
injuries if not prevented.
WARNING
Indicates a situation presenting possible danger, which may lead to death or serious
injuries if not prevented.
CAUTION
Indicates a situation presenting possible danger, which may lead to moderate or minor
injuries if not prevented.
NOTICE
Indicates a situation presenting possible danger, which may lead to property damage if
not prevented.
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NOTE
Indicates useful tips and recommendations.
Instructions to action
bThe arrow denotes instructions to action. Read carefully and follow the instructions
for action.
LED symbols
These symbols indicate the status of an LED:
The LED is off.
The LED is illuminated continuously.
 The LED is flashing.
 Two LEDs are flashing alternately.
 Two LEDs are flashing in synchronism.
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2 Safety information
2.1 General safety notes
This chapter contains general safety information about the safe sensor cascade.
More safety information about specific usage situations of the safe sensor cascade is
available in the respective chapters.
DANGER
Hazard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
bRead this document carefully and ensure that you have fully understood the con‐
tents before you work with the device.
bPay particular attention to all safety notes in this document.
2.2 Correct use
The Flexi Loop safe sensor cascade is an expansion for the Flexi Soft and Flexi Classic
safety controllers. It can be used …
•To IEC 61508 up to SIL3
•To EN 62061 up to SIL claim limit 3
•To EN ISO 13849-1 up to category 4 and performance level e
The degree of safety actually attained depends on the external circuit, the design of the
wiring, the parameter configuration, the selection of the safety sensors and their place‐
ment on the machine.
The safe sensor cascade must only be used within the limits of the prescribed and
specified technical data and operating conditions at all times.
Incorrect use, improper modification, or tampering with the safe sensor cascade will
invalidate any warranty offered by SICK AG; in addition, any responsibility and liability
on the part of SICK AG for damage and secondary damage caused by such use, modifi‐
cation, or tampering shall be excluded.
Foreseeable misuse
The Flexi Loop safe sensor cascade is not suitable for the following usage, among oth‐
ers:
•outdoors
•under water
•in explosive environments
2.3 Requirements for the qualification of personnel
Only qualified safety personnel are permitted to configure, install, connect, commission,
and maintain the safe sensor cascade.
Project planning
For project planning, a person is considered competent when he/she has expertise and
experience in the selection and use of protective devices on machines and is familiar
with the relevant technical rules and national work safety regulations.
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Mechanical mounting
For mechanical mounting, a person is considered competent when he/she has the
expertise and experience in the relevant field and is sufficiently familiar with the appli‐
cation of the protective device on the machine that he/she can assess its operational
safety status.
Electrical installation
For electrical installation, a person is considered competent when he/she has the
expertise and experience in the relevant field and is sufficiently familiar with the appli‐
cation of the protective device on the machine that he/she can assess its operational
safety status.
Configuration
For configuration, a person is considered competent when he/she has the expertise
and experience in the relevant field and is sufficiently familiar with the application of
the protective device on the machine that he/she can assess its work safety aspects.
Commissioning
For commissioning, a person is considered competent when he/she has the expertise
and experience in the relevant field and is sufficiently familiar with the application of
the protective device on the machine that he/she can assess its operational safety sta‐
tus.
Operation and maintenance
For operation and maintenance, a person is considered competent when he/she has
the expertise and experience in the relevant field and is sufficiently familiar with the
application of the protective device on the machine and has been instructed by the
machine operator in its operation.
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3 Product description
This chapter provides information on the principle of operation of the safe sensor cas‐
cade and provides application examples.
3.1 Structure and function
The Flexi Loop safe sensor cascade is an expansion for the Flexi Soft or Flexi Classic
system. A safe sensor cascade comprises individual Flexi Loop nodes that are con‐
nected to the safety controller. The Flexi Loop nodes make it possible to collect informa‐
tion from physically distributed safety sensors and safety switches.
Figure 1: Flexi Loop safe sensor cascade
1Flexi Soft
2Flexi Classic with MSTR Flexi Loop accessory
3Safety sensors with monitored semiconductor output (OSSD)
4Electro-mechanical safety switches
5Flexi Loop
Dual-channel, equivalent switching, electro-mechanical safety switches (e.g. reed
switches) or safety sensors with monitored semiconductor output (OSSD) (e.g. safety
light curtains or safety laser scanners) can be connected to the Flexi Loop nodes.
The main function of the Flexi Loop nodes is the safe and quick monitoring of the
switches and sensors connected so as to provide a common shutdown criterion to the
safety controller.
Diagnostic functions make it possible to locate which safety sensor or safety switch has
shut down for which reason. Discrepancy or sequence errors are detected by means of
testing, as are cross-circuits or short-circuits on the sensors or switches.
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Unsafe inputs and outputs also make it possible to evaluate certain situations (e.g. con‐
tamination) on the monitored system or to trigger functions (e.g. illumination of lamps
and activation of door locking devices).
Special features
•up to 32 Flexi Loop nodes per safe sensor cascade
•up to 100 m between Flexi Loop nodes and up to 3,200 m total length of the safe
sensor cascade
•up to 10 m cable length between the Flexi Loop nodes and the devices connected
•optional status indication via DIAG Flexi Loop accessory
•optional power supply by means of PWRI power supply accessory
•enclosure rating IP 65 and IP 67 to EN 60529
Connection to safety controllers:
•Flexi Soft safety controller
•Flexi Classic safety controller
•up to 8 safe sensor cascades on one Flexi Soft safety controller
•up to 48 safe sensor cascades on one Flexi Classic safety controller
3.1.1 System requirements
Flexi Soft safety controller
The safe sensor cascade is connected directly to a Flexi Soft safety controller extension
module. The following prerequisites apply:
•one main module
°FX3-CPUx with firmware V3.xx or higher
•one or more expansion modules
°FX3-XTIO with firmware V3.xx or higher
°FX3-XTDI with firmware V3.xx or higher
°FX3-XTDS with firmware V3.xx or higher
Flexi Classic safety controller
The safe sensor cascade is connected to the main module or a Flexi Classic safety con‐
troller extension module with a Flexi Loop MSTR accessory. The following prerequisites
apply:
•one main module
°UE410-MU version 13.45 or higher
•one Flexi Loop MSTR1 or MSTR2 accessory
•one or more extension modules (optional)
°UE410-XU version 13.45 or higher
°UE410-8DI version 13.45 or higher
3.1.2 Safety by means of Flexi Loop
•Performance level up to PL e
°dependent on the performance level of the overall application
°independent of the number of Flexi Loop nodes and thus the number of sen‐
sors / switches
°independent of whether the sensors / switches are directly connected to the
safety controller or to the safe sensor cascade
•one cut-off path; the status of this path is represented in the Flexi Soft logic by
means of a single safe bit. This feature permits quick, safe shutdown.
•no error masking
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The problem of error masking
If tested dual-channel equivalent safety switches are connected in series, errors cannot
be detected reliably. The following example shows such a situation.
Figure 2: Error masking
If the switch S2 is opened correctly, e.g. the system is shut down. If the switch S3 is
now also opened, the error on S3 cannot be detected (error masking). If the switch S3
is closed before S2, the error remains undetected.
3.1.3 Subdivision of the safe sensor cascade
The safe sensor cascade is divided into segment, section and string:
•Segment
A segment starts at the safety controller or the FL_OUT female connector of the
upstream Flexi Loop node; it includes the connection cable as far as the FL_OUT
female connector of the Flexi Loop node (see "Connections of the Flexi Loop
nodes", page 44) and the supply lines to the devices that are connected to the
Flexi Loop node.
•section
A section extends from a supply of power to the next accessory for the supply of
power or to the terminator.
•string
A string covers the complete safe sensor cascade from the connection on the
safety controller to the terminator.
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Figure 3: Subdivision of the safe sensor cascade
1Segment
2Section
3String
4Safety controller
The Flexi Loop safe sensor cascade has a line topology. After the last Flexi Loop node
the cascade must always be terminated using a FLT-TERM00001 terminator.
NOTE
The terminator must be connected directly to the Flexi Loop node, it is not allowed to be
connected via a cable.
Power supply and diagnostic accessories can be installed between the Flexi Loop
nodes (see "Supply of power", page 14).
Within Flexi Loop, the connection is made with standard 5-pin unshielded cables with A-
coded M12 male connectors and M12 female connectors. Cables up to 100 m in
length can be laid between the individual Flexi Loop nodes.
Sensors or switches are connected with 5-pin or 8-pin unshielded cables with M12
male connectors (see "Pre-assembled cables", page 95). A series of SICK sensors or
switches can be connected with 1:1 cables (male/female connector).
The Flexi Loop YCON1 and YCON2 adapters can be used to decouple the non-safe
inputs and outputs of the 8-pin Flexi Loop EMSS nodes and the 8-pin Flexi Loop OSSD
nodes.
•The cables for the sensors or switches must not exceed a length of 10 m 1).
•You must consider the pin assignment of the individual Flexi Loop nodes and the
accessories when making the connection (see "Connections", page 42).
3.1.4 Supply of power
DANGER
Always supply the OSSD devices connected with power via the OSSD female connector
on the Flexi Loop node!
Never supply an OSSD device connected with power directly from a separate power sup‐
ply. If several power supplies in a Flexi Loop section are connected in parallel, in case of
a ground fault overcurrent and a cable fire may occur.
Always use the power supply accessory to connect additional power supplies.
1) Including any connecting cables that might be used for the Flexi Loop YCON1 and YCON2 adapters.
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The power supply accessory is characterized by:
•Voltage supply to the safe sensor cascade and connection of additional power
supply units (see "Connection facilities", page 28)
•electrical isolation in individual sections
•shutdown of the safe sensor cascade or the section in case of overload
Depending on the number of Flexi Loop nodes, the length of the cables, and the power
consumption of the connected sensors or actuators, a voltage supply from a single
power supply unit might not be sufficient. Should this be the case, additional power
supply units can be connected with the power supply accessory.
Figure 4: Supply of power
1Section 1
2Section 2
3Supply of power for section 2
3.2 Principle of operation
3.2.1 Operating principle of Flexi Soft
The Flexi Soft I/O modules provide the interface to the Flexi Soft safety controller.
Safe cut-off path
The safety information on the switches and sensors connected is combined and trans‐
mitted quickly and safely to the Flexi Soft.
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Figure 5: Safe cut-off path
1Safe cut-off path
2I/O module for the Flexi Soft safety controller
3Safety sensors with monitored semiconductor output (OSSD)
4Electro-mechanical safety switches
Diagnostic information
Non-safe diagnostic information about the statuses inside the safe sensor cascade and
about the Flexi Loop nodes is also sent to the Flexi Soft safety controller.
Further processing of information in the logic editor
The safety information and the non-safe diagnostic information can undergo further
processing in the logic of the Flexi Soft safety controller (see the “Flexi Loop in the Flexi
Soft Designer” operating instructions, part no. 8014522) or it can be forwarded to a
PLC, for example, via a gateway.
Figure 6: Further processing of information
1Gateway
2Diagnostic information
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3.2.2 Operating principle on Flexi Classic
Flexi Loop MSTR1 or MSTR2 accessory
The safe sensor cascade is connected to the Flexi Classic safety controller with a Flexi
Loop MSTR1 or MSTR2 accessory. The Flexi Loop accessory enables the safe sensor
cascade to function as a dual-channel equivalent opening safety switch. The safety
information from the connected switches and sensors is collated and sent quickly and
securely to the inputs of the Flexi Classic safety controller.
In the example Flexi Loop is connected to the input control circuit A. Program 1 is
selected.
Figure 7: MSTR1 Flexi Loop accessor on the Flexi Classic safety controller
1Program in Flexi Classic
2MSTR1 Flexi Loop accessory
3Safety sensors with monitored semiconductor output (OSSD)
4Electro-mechanical safety switches
If a safety sensor or a safety switch at a Flexi Loop node switches to the OFF state, the
Flexi Loop MSTR1 or MSTR2 accessory can be relied upon to forward this cut-off infor‐
mation.
In the example, program 1 is cutting off the Q1 and Q2 OSSDs of the safety controller.
You can find detailed information about the safety controller programs in the “Flexi
Classic Modular Safety Controller” operating instructions (SICK part no. 8011737).
I/O functions of the Flexi Loop MSTR2 accessory
The Flexi Loop MSTR2 accessory supports non-safe I/O functions in addition to the
functions of the Flexi Loop MSTR1 accessory.
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Figure 8: I/O functions of the Flexi Loop MSTR2 accessory
1Program in Flexi Classic
2I/O functions
3Emergency stop pushbutton with reset button and Reset required lamp
In the configuration from the factory the AUX_IN of the MSTR2 Flexi Loop accessory
switches all AUX_OUT of the Flexi Loop nodes. The AUX_IN of the Flexi Loop nodes
switch the AUX_OUT of the MSTR2 Flexi Loop accessory.
The non-safe input of the MSTR2 Flexi-Loop accessory switches the non-safe outputs of
the Flexi Loop nodes. You can use this function, for example, to control lamps or to
implement a locking device.
The non-safe output of the Flexi Loop MSTR2 accessory collects the statuses of the
non-safe inputs of the Flexi Loop nodes. The statuses are linked with a logical OR oper‐
ation prior to delivery (factory setting). You can use this function for a group reset sig‐
nal, for example.
The factory settings for the MSTR2 Flexi Loop accessory can be configured via IO-Link.
IO-Link functions of the MSTR2 Flexi Loop accessory
If the IO-Link is connected, for example, to a PLC, then the MSTR2 Flexi Loop accessory
and the PLC exchange data via this interface.
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Figure 9: IO-Link functions of the MSTR2 Flexi Loop accessory
1Program in Flexi Classic
2LED display
3Diagnostics information on the PLC
The parameter list with all data that can be read and written is available as a separate
document (SICK part number 8017450).
Process data
The PLC and the MSTR2 Flexi Loop accessory communicate cyclically in a data frame
for process data:
•Flexi Loop transmits 4 bytes of input data to the PLC. These bytes contain the sta‐
tus of the non-safe inputs AUX_IN of the Flexi Loop nodes.
•Flexi Loop receives 4 byte of output data from the PLC. These bytes contain the
commands for the non-safe outputs AUX_OUT of the Flexi Loop nodes.
Service data
The PLC communicates acyclically with the MSTR2 Flexi Loop accessory for service
data. The service data offer the following options:
•execution of commands
•configuration of the parameters for the Flexi-Loop string and the individual Flexi
Loop nodes
•reading the parameter values and statuses of the Flexi Loop string and the Flexi
Loop nodes
Events
While in operation you can follow occurrences in the system via so-called events. The
following events are available:
•state of the cut-off path
•synchronization safety controller
•Flexi Loop not in operation
•cable connection
•dynamic error
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•static error
•critical error
•configuration difference
3.2.3 Protection against tampering
DANGER
Hazard due to disabling the protection against tampering!
If you disable the protection against tampering, then a Flexi Loop node can be removed
or jumpered. In this situation the safe sensor cascade switches on despite the change.
Only disable the tamper protection if imperative for the implementation of the applica‐
tion. In this case prevent possible tampering by other measures (e.g. protected cable
laying).
Flexi Soft safety controller
The Flexi Soft safety controller saves the node type and the number of nodes in a safe
sensor cascade.
This prevents Flexi Loop nodes from being replaced with other types of node as well as
preventing them from being removed, added, or jumpered. In specific cases, this pro‐
tection against tampering can be disabled (see the “Flexi Loop in the Flexi Soft
Designer” operating instructions, part no. 8014522).
Flexi Classic safety controller with Flexi Loop MSTR accessories
The MSTR Flexi Loop accessory saves the number of nodes in a safe sensor cascade.
In this way it is ensured Flexi Loop nodes are not removed or added, or Flexi Loop
nodes jumpered.
If you wish, you can configure IO-Link so that the Flexi Loop MSTR2 accessory also
saves the node type. If you do this, the Flexi Loop MSTR2 accessory is able to prevent
Flexi Loop nodes from being replaced with other types of node. In specific cases, this
protection against tampering can be disabled (see "Removing protection against tam‐
pering", page 56).
3.3 Device components
3.3.1 Flexi Loop node
FLN-EMSS0000105 — 5-pin
Figure 10: FLN-EMSS0000105 Flexi Loop node — 5-pin
The 5-pin EMSS Flexi Loop node is suitable for connecting dual-channel, equivalent
switching electro-mechanical safety switches, e.g. magnetic safety switches or emer‐
gency stop pushbuttons. The safety switches connected are tested for cross-circuit and
short-circuit as well as discrepancy and sequence errors.
3 PRODUCT DESCRIPTION
20 O P E R A T I N G I N S T R U C T I O N S | Flexi Loop 8015836/YT10/2016-05-24 | SICK
Subject to change without notice