Inxpect LBK System User manual

Instructions translated from the original
LBK System
Instruction manual
v1.3 - EN
Volumetric Safety System
WARNING! Whoever uses this system must read the instruction manual for their safety. Read and
adhere to the "Safety information" chapter in its entirety before using the system for the first time.

Copyright © 2018-2019, Inxpect SpA
All rights reserved in all countries.
Any distribution, alteration, translation or reproduction, partial or total, of this
document is strictly prohibited unless with prior authorization in writing from
Inxpect SpA, with the exception of the following actions:
lPrinting the document in its original format, totally or partially.
lTransferring the document on websites or other electronic systems.
lCopying contents without any modification and stating Inxpect SpA as
copyright owner.
Inxpect SpA reserves the right to make modifications or improvements to the
relative documentation without prior notice.
Requests for authorization, additional copies of this manual or technical
information on the latter, must be addressed to:
Inxpect SpA
Via Serpente, 91
25131 Brescia (BS)
Italy
[e-mail]
[phone]

Contents
Glossary of terms iv
1. This manual 6
1.1 Information on this manual 6
2. Safety 8
2.1 Safety information 8
2.2 Conformity 9
2.3 National restrictions 11
3. Get to know LBK System 13
3.1 LBK System 13
3.2 Controller LBK-C22 14
3.3 Sensors LBK-S01 16
3.4 Inxpect Safety application 17
4. Functioning principles 18
4.1 Sensor functioning principles 18
4.2 Safety functions 18
4.3 Access detection function 19
4.4 Restart prevention function 19
4.5 Muting 21
4.6 Anti-tampering function 22
4.7 Anti-masking function 23
5. Sensor position 25
5.1 Basic concepts 25
5.2 Sensor field of vision 26
5.3 Dangerous area calculation 27
5.4 Calculation of position for sensor height < 1 m 28
5.5 Calculation of position for sensor height > 1 m 32
5.6 Outdoor installations 34
6. Applications 35
6.1 Applications overview 35
6.2 Linear barrier (complete restart prevention) 36
6.3 Linear barrier (limited restart prevention) 38
6.4 Other applications 42
7. Installation and use procedures 44
7.1 Before installation 44
7.2 Install and configure LBK System 45
7.3 Validate safety functions 49
7.4 Manage the configuration 51
7.5 Other functions 52
8. Maintenance and troubleshooting 53
8.1 Troubleshooting 53
8.2 System log 54
8.3 Cleaning and spare parts 56
8.4 Periodic tests 57
8.5 Updates 57
9. Technical references 59
9.1 Technical data 60
9.2 Terminal blocks and connectors pin-outs 61
9.3 Electrical connections 63
9.4 Default values 67
10. Appendix 69
10.1 Disposal 69
10.2 Service and warranty 69
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Glossary of terms
D
Dangerous area
Area to be monitored because it is dangerous for people.
Detection area
Portion of the field of vision where detection is guaranteed.
F
Field of vision
Sensor area of vision. It is composed of two areas: detection area and uncertainty area. It can have
two ranges: 110° and 50°.
FMCW
Frequency Modulated Continuous Wave.
M
Machinery
The system for which the dangerous area is monitored.
Monitored area
Area actually monitored by the system. Includes the stopping area, and only for the access
detection function, any pre-alarm area.
P
Pre-alarm area
Only for the access detection function. Area where motion detection triggers the closure of the
dedicated auxiliary relay.
R
Rotation
Sensor rotation around the transverse axis. The sensor inclination is the angle between the center of
the field of vision of the sensor and a line parallel to the ground.
S
Stopping area
Portion of the area monitored by the sensor where, if motion is detected, the system safety relays
are de-energized. If it does not correspond to the dangerous area defined in the risk assessment,
the residual risk must be calculated and additional safety measures must be introduced.
Glossary of terms

T
Tolerance area
Portion of the monitored area where detection is not guaranteed.
U
Uncertainty area
Area of the field of vision where detection or not of an object depends on the characteristics of the
same object.
Glossary of terms
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1. This manual
1.1 Information on this manual
1.1.1 Objectives of this instruction manual
This manual explains how to integrate LBK System for safeguarding machinery operators and how to install
it, use it and maintain it safely.
These instructions do not pertain to the functioning of the machinery where LBK System is installed.
1.1.2 Obligations with regard to this manual
NOTICE: this manual is an integral part of the product and must be kept for its entire working life.
It must be consulted for all situations related to the life cycle of the product from its delivery through to
decommissioning.
It must be conserved so that it is accessible to operators, in a clean location and in good condition.
In the event of manual loss or damage, contact Customer Assistance Service.
Always enclose the manual when the equipment is sold.
1.1.3 Provided documentation
Document Code Date Distribution format
Instruction manual (this
manual)
LBK-System_
instructions_en v1.3
SEP
2019
hard copy
online PDF
PDF downloadable from the site
www.inxpect.com/industrial/tools
Instruction manual to interact
with Inxpect Safety
LBK-app_
instructions_en v1.3
SEP
2019
the online help accessible from the
application Inxpect Safety
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1.1.4 Instruction manual updates
Publication
date Code Updates
SEP 2019 LBK-System_
instructions_
en v1.3
Added formulas to calculate the real alarm distance (installation < 1m
"Calculate the real alarm distance" on page32 and installation > 1m "Calculate
the real alarm distance" on page33)
Added topic "Safety functions" on page18
Added table "Default values" on page67
Integrated restart prevention function ("Restart prevention function" on
page19)
Added anti-masking function sensitivity levels ("Sensitivity level" on page24)
Integrated anti-tampering function: considered rotations, disabling and checks
("Anti-tampering function" on page22)
Added reference to Metal protector kit
Integrated muting function: signal characteristics ("Enable muting signal
characteristics" on page22)
Integrated restrictions and conformity notes "Conformity" on page9
Updated procedure "Define the working frequency of the sensors" on page45
Alignment with new application version Inxpect Safety
Access detection security function renamed
Other minor changes
FEB 2019 LBK-System_
instructions_
it v1.2
Added 50° field of vision ("Sensor field of vision" on page26)
Added application validation procedure Inxpect Safety ("Validate safety
functions" on page49)
Updated contents for installation of sensors at heights over 1 m
Integration for masking signals ("Anti-masking function" on page23)
Added formulas for calculation of sensor position ("Calculation of position for
sensor height > 1 m" on page32
Reorganization of topics
SEP 2018 LBK-System_
instructions_
en v1.1
"Anti-tampering function" on page22
Changed and integrated the section "Applications" on page35
Added working frequency setting
Changed voltage and current values for safety relays
JUN 2018 LBK-System_
instructions_
en v1.0
First publication
1.1.5 Intended users of this instruction manual
The recipients of the instruction manual are:
lThe designer of the machinery onto which the system will be installed
lSystem installer
lMachinery maintenance technician
1. This manual
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2. SAFETY
2.1 Safety information
2.1.1 SAFETY MESSAGES
Warnings related to safety of the user and equipment as envisaged in this document are as follows:
WARNING! indicates a hazardous situation which, if not avoided, may cause death or serious
injury.
NOTICE: indicates obligations that if not observed may cause harm to the equipment.
2.1.2 PERSONNEL SKILLS
The recipients of this manual and the skills required for each activity presented herein are as follows:
Recipient Assignments Skills
Machinery
designer
lDefines which protective devices
should be installed and installation
specifications
lKnowledge of significant hazards of the
machinery that must be mitigated based on
risk assessment.
lKnowledge of the entire machinery safety
system and the system on which it is
installed.
Protection
system installer
lInstalls the system
lConfigures the system
lPrints configuration report
lAdvanced technical knowledge in the fields
of electrical and industrial safety
lKnowledge of the dimensions of the
dangerous area of the machinery to be
monitored
lReceives instructions from the machinery
designer
Machinery
maintenance
technician
lPerforms maintenance on the
system
lAdvanced technical knowledge in the fields
of electrical and industrial safety
2.1.3 INTENDED USE
LBK System is certified as SIL 2 according to IEC/EN 62061 and PL d in accordance with EN ISO 13849-1.
Performs the following safety functions:
laccess detection function: prevents access to a dangerous area. Access to the area de-energizes the
safety relays to stop the machinery's moving parts.
lrestart prevention function: prevents unexpected starting or restarting of the machinery. Detection of
motion within the dangerous area maintains the safety relays de-energized to prevent machinery
starting.
LBK System is suitable for protecting the entire body.
LBK System has been designed to monitor dangerous areas in industrial environments. Thanks to IP67
protection grade, the sensors are suitable for indoor and outdoor installations.
2.1.4 GENERAL WARNINGS
lWrong installation and configuration of the system decreases or inhibits the protective function of the
system. Follow the instructions provided in this manual for correct installation, configuration and
validation of the system.
lChanges to the system configuration may compromise the protective function of the system. After any
changes made to the configuration, validate correct functioning of the system by following the
instructions provided in this manual.

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lIf the system configuration allows access to the dangerous area without detection, implement additional
safety measures (e.g. guards).
lThe presence of static objects, in particular metallic objects, within the field of vision may limit the
efficiency of sensor detection. Keep the sensor field of vision unobstructed.
lThe system protection level (SIL 2, PL d) must be compatible with the requirements set forth in the risk
assessment.
lCheck that the temperature of the areas where the system is stored and installed is compatible with the
storage and operating temperatures indicated in the technical data of this manual.
2.1.5 WARNINGS FOR THE RESTART PREVENTION FUNCTION
lThe restart prevention function is not guaranteed in blind spots. If required by the risk assessment,
implement adequate safety measures in those areas.
lMachinery restarting must be enabled only in safe conditions. The restart enable button must be installed:
ooutside of the dangerous area
onot accessible from the dangerous area
oin a point where the dangerous area is fully visible
2.1.6 RESPONSIBILITY
The machinery designer and system installer are responsible for the operations listed below:
lProviding adequate integration of the system's outgoing signals (both safety and auxiliary).
lChecking the monitored area of the system and validating it based on the needs of the application and
risk assessment. Following the instructions provided in this manual.
2.1.7 LIMITS
lThe system cannot detect the presence of people who are immobile and not breathing or objects within
the dangerous area.
lThe system does not offer protection from pieces ejected from the machinery, from radiation, and objects
falling from above.
lThe machinery command must be electronically controlled.
2.2 Conformity
2.2.1 STANDARDS AND DIRECTIVES
Directives 2006/42/EC (MD - Machinery)
2014/53/EU (RED - Radio equipment)
Standards IEC/EN 62061: 2005 SIL 2
EN ISO 13849-1: 2015 PL d
EN ISO 13849-2: 2012
IEC/EN 61496-1: 2013
IEC/EN 61508: 2010 Part 1-7 SIL 2
ETSI EN 300 440 v2.1.1
ETSI EN 301 489-1 v2.2.0 (only emissions)
ETSI EN 301 489-3 v2.1.1 (only emissions)
IEC/EN 61326-3-1:2017
IEC/EN 61010-1: 2010
Note: no type of failure has been excluded during the system analysis and design phase.
2.2.2 CE
The manufacturer, Inxpect SpA, states that the LBK System type of radio equipment complies with the

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2014/53/EU and 2006/42/CE directives. The full EU declaration of conformity text is available on the
company's website at the address: www.inxpect.com.
At the same address all updated certifications are available for download.
2.2.3 FCC
LBK System complies with FCC CFR title 47, part 15, subpart B. It contains FCC ID: UXS-SMR-3X4.
Operation is subject to the following two conditions:
lthis device may not cause harmful interference, and
lthis device must accept any interference received, including interference that may cause undesired
operation
NOTICE: changes or modifications made to this equipment and not explicitly approved by Inxpect SpA may void the
FCC authorization to operate this equipment.
2.2.4 INDUSTRY CANADA
en This device contains licence-exempts radio apparatus that complies with Innovation, Science and
Economic Development Canada’s RSS-310.
Operation is subject to the following conditions:
lthis device may not cause harmful interference, and
lthis device must accept any interference received, including interference that may cause undesired
operation.
fr L’appareil radio exempt de licence contenu dans le present appareil est conforme aux CNR
d’Innovation, Sciences et Developpement economique Canada RSS-310.
L’exploitation est autorisee aux deux conditions suivantes :
lL’appareil ne doit pas produire de brouillage;
lL’appareil doit accepter tout brouillage radioelectrique subi, meme si le brouillage est susceptible d’en
compromettre le fonctionnement.
2.2.5 SRRC
en LBK-S01 is a micro-power (short range) radio transmission equipment, type G, and does not require
any type approval.
zh-CN LBK-S01是一种微功率(近程)无线电传输设备，G型，不需要任何类型认可。
2.2.6 IMDA
2.2.7 NCC
en The use of low-power RF devices shall not affect flight safety or interfere with legal communications;
if interference is found, the user should stop using the device immediately and improve it until there is no
interference.

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Legal communication in the preceding paragraph refers to radio communications operating in accordance
with the provisions of the Telecommunications Act. Low-power RF devices must withstand interference
from legitimate communications or radio electrical equipment for industrial, scientific, and medical use.
zh-TW 第十二條 經型式認證合格之低功率射頻電機，非經許可，公司、商號或使用者均不得擅自變更
頻率、加大功率或變更原設計之特性及功能。
第十四條 低功率射頻電機之使用不得影響飛航安全及干擾合法通信；經發現有干擾現象時，應立即停
用，並改善至無干擾時方得繼續使用。前項合法通信，指依電信法規定作業之無線電通信。低功率射頻
電機須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干擾。
2.2.8 ICASA
TA 2019-5126
APPROVED
2.3 National restrictions
2.3.1 FRANCE AND THE UNITED KINGDOM
LBK System is a short range device in class 2 in accordance with the directive 2014/53/EU (RED - Radio
equipment) and is subject to the following restrictions:
FR UK
it Restrictions in France and the United Kingdom. The national frequency allocation in France and the
United Kingdom prohibits free use of the entire 24-24.25 GHz band. Correctly set the authorized band in the
Inxpect Safety application.
fr Restrictions en FR. En France, la répartition nationale des fréquences ne permet pas l'utilisation libre
de la totalité de la bande 24-24,25 GHz. Définissez correctement la bande autorisée dans l'application Inxpect
Safety.
2.3.2 JAPAN
en Restrictions in Japan. In Japan, the national allocation of frequencies does not allow the free use of
the whole band 24-24.25 GHz. Set the country correctly in the Inxpect Safety application and the authorized
band 24,05-24,25 GHz will be automatically selected.
ja 日 本 における制 限。日 本 では、全 国 的 な周 波 数 割 り当 てでは、24〜24.25 GHzの全帯域を自由に使用
することはできません。Inxpect Safetyアプリケーションで承 認 された帯 域 を設 定 します。
2.3.3 KOREA
en Restrictions in Korea. In Korea, the national allocation of frequencies does not allow the free use of
the whole band 24-24.25 GHz. Set the country correctly in the Inxpect Safety application and the authorized
band 24,05-24,25 GHz will be automatically selected.
ko 한국의 제한.한국에서는 국가의 주파수 할당 규정에 따라 24-24.25 GHz 전체 주파수 대역을 무료로 사용하
는 것을 허용하지 않는다. Inxpect Safety 애플리케이션에서승인된대역을 설정한다.

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2.3.4 ARGENTINA
en Restrictions in Argentina. In Argentina, the national allocation of frequencies does not allow the free
use of the whole band 24-24.25 GHz. Set the authorized band correctly in the Inxpect Safety application.
es-AR Restricciones en Argentina. La atribución de las bandas de frecuencia en la República Argentina no
permite el uso libre de toda la banda de 24-24,25 GHz. Configure correctamente la banda autorizada en la
aplicación Inxpect Safety.
2.3.5 MEXICO
en Restrictions in Mexico. In Mexico, the national allocation of frequencies does not allow the free use
of the whole band 24-24.25 GHz. Set the country correctly in the Inxpect Safety application and the
authorized band 24,05-24,25 GHz will be automatically selected.
es-MX Restricciones en México. La atribución de las bandas de frecuencia en México no permite el uso libre
de toda la banda de 24-24,25 GHz. Configure correctamente la banda autorizada en la aplicación Inxpect
Safety.
2.3.6 CHINA
en Restrictions in China. The use in China is strictly linked to compliance with the temperature range of
operation, which can not fall below 0° C or 32° F.
zh-CN 中国的限制。在中国使用须严格符合操作温度范围，不能低于0°C或32°F。

3. Get to know LBK System
Contents
This section includes the following topics:
3.1 LBK System 13
3.2 Controller LBK-C22 14
3.3 Sensors LBK-S01 16
3.4 Inxpect Safety application 17
3.1 LBK System
3.1.1 Safety functions
LBK is an active protection radar system that monitors the dangerous areas of a machinery. It can perform
two safety functions (see "Safety functions" on page18):
laccess detection function: it places the machinery in a safe condition when someone enters the
dangerous area
lrestart prevention function: it inhibits the machinery restart if there are people in the dangerous area
3.1.2 Inputs and outputs
Thanks to its digital inputs and outputs, LBK System provides an automatic control system that manages
the primary safety functions of the machinery.
In addition to safety outputs, the system is also fitted with two configurable auxiliary outputs (failure, pre-
alarm and muting status) and three digital inputs (emergency button, restart enable button and muting).
3.1.3 Special features
Some of the special features of this protection system are presented as follows:
limmunity to dust and smoke
lreduction of false alarms caused by the presence of water or processing waste
lpre-alarm area to signal proximity or prepare the machinery for stopping
lthree configurable sensitivity levels
lmuting on the entire system or only on some sensors
3.1.4 Main components
LBK System is composed of a controller and up to six sensors. The Inxpect Safety software application
allows system operation configuration and checks.
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3.1.5 Controller - sensors communication
The sensors communicate with the controller via CAN bus using diagnostic mechanisms in compliance with
standard EN 50325-5 to guarantee SIL 2 and PL d.
For correct functioning, each sensor must be assigned with an identification (ID). Two sensors on the same
bus must have different IDs.
The default settings for the sensors is ID = 0, or no assigned ID.
3.1.6 Applications
LBK System integrates with the machinery control system: when performing safety functions or detecting
failures, LBK System de-energizes the safety relays and keeps them de-energized, so the control system can
command safety conditions of the area and/or prevent restarting of the machinery.
In the absence of other control systems, LBK System can be connected to the devices that control the power
supply or machinery start-up (e.g. external relays on the power supply line).
LBK System does not perform normal machinery control functions.
For connection examples, see "Electrical connections" on page63.
3.2 Controller LBK-C22
3.2.1 Functions
The controller performs the following functions:
lCollects information from all the sensors via CAN bus.
lCompares the position of detected motion with the set stopping and pre-alarm thresholds.
lDe-energizes the safety output relays when at least one sensor detects motion in the stopping area.
lDe-energizes the safety output relays if a failure is detected in the sensor or the controller.
lManages the auxiliary inputs and outputs (to learn about the functions see "Auxiliary outputs" on the
next page and "Digital inputs" on the next page).
lCommunicates with the Inxpect Safety software for all configuration and diagnostic functions.
3.2.2 Structure
Part Description
ADIP switch to include/exclude the termination resistance:
lOn (default) =resistance included
lOff = resistance excluded
BDigital inputs status LED
CSensors CAN bus terminal block
DMicro USB port for connecting the computer and communicating with the Inxpect Safety
software
ESafety outputs status LED
FAuxiliary outputs status LED
GPower supply terminal block
HDigital inputs terminal block
3. Get to know LBK System

Part Description
ISystem status LED
LSafety outputs terminal block
MAuxiliary outputs terminal block
3.2.3 System status LED
The LEDs are each dedicated to a sensor, and can display the following statuses:
Status Meaning
Green Normal sensor function and no movement detected
Orange Normal sensor function and some movement detected
Flashing red Sensor in error. See "Controller LED" on page53
Steady red System error. See "Controller LED" on page53
3.2.4 Inputs and outputs status LED
The meaning of the LEDs when they are on is as follows:
LED Meaning
Safety output Energized relay (closed contact)
Auxiliary output Energized relay (closed contact)
Digital input High logic level (1)
3.2.5 Safety outputs
The controller has one dual channel safety output realized with forced guided safety relays for alarms and,
direct or indirect, safety of the machinery.
3.2.6 Safety outputs status
The relay contacts are normally open. The statuses of the safety outputs are as follows:
lde-energized relay (open contact):
omotion detected in stopping area or
ofailure detected in system
lenergized relay (contact closed): no motion detected and normal functioning
3.2.7 Auxiliary outputs
The controller has two relay outputs, which can be configured via the Inxpect Safety application, for:
lpre-alarm
lfailure
lmuting status
3.2.8 Auxiliary outputs status
The statuses of the auxiliary outputs are as follows:
Output De-energized relay (open contact) Energized relay (closed contact)
Pre-alarm No motion detected in the pre-alarm area Motion detected in the pre-alarm area
Failure Failure Normal functioning
Muting status Muting disabled Muting enabled
3.2.9 Digital inputs
The controller has three dual channel digital inputs and common reference potential for:
lmuting function (signal with characteristics according to the parameters set = muting enabled, see
"Enable muting signal characteristics" on page22)
3. Get to know LBK System
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lmachinery emergency button (low logic level (0) = stopping enabled)
lbutton for enabling machinery restart (high logic level (1) for 200 ms and transition to low logic level (0)
= restart enabled)
The inputs are type1, type 2 and type 3 (see "Voltage and current limits for digital inputs" on page62).
The function of the inputs can be configured through the Inxpect Safety application.
3.2.10 SNS input
The controller also has an SNS input (high logic level (1) = 24 V) to check the correct functioning of the chip
that detects the status of the inputs.
NOTICE: if at least one input is connected, the SNS input must also be connected.
3.3 Sensors LBK-S01
3.3.1 Functions
The sensors perform the following functions:
lDetect motion in their field of vision.
lSend the motion detection signal to the controller through CAN bus.
lSignal failures detected in diagnostics on the controller through CAN bus.
3.3.2 Structure
Part Description
ASensor
BScrews for fastening the sensor at a specific inclination
CPerforated bracket for installing the sensor on the ground or on the machinery
DStatus LED
EConnectors for connecting the sensors in a chain and to the controller
3.3.3 Status LED
Status Meaning
Steady on Normal functioning and no detected motion
Rapid flashing on (100 ms) Normal functioning and motion detected
Other conditions Error. See "Sensor LED" on page53
3. Get to know LBK System

3.4 Inxpect Safety application
3.4.1 Functions
The application permits the following main functions to be performed:
lConfigure the system.
lPrint configuration report.
lCheck system functioning.
lDownload system log.
3.4.2 Access
The application can be downloaded free of charge at www.inxpect.com/industrial/tools.
To use the application, the computer must be connected to a LBK-C22 controller using a micro-USB cable.
Some functions are password protected. The password is to be set through the application and then saved
on the controller. The available functions according to access type are presented as follows:
Available functions Access type
lDisplay the system status (Dashboard)
lDisplay the sensors configuration (Configuration)
lPerform a periodic test (Maintenance)
lDownload the system log and display the reports (Settings >Activity History)
lRestore factory default settings (Settings >General)
lBack up the configuration (Settings >General)
lValidate the system (Validation)
without password
lAll the available functions without password
lConfigure the system (Configuration and Settings)
lLoad a configuration (Settings >General)
lChange the access password (Settings >User account)
lUpdate the firmware (Settings >General)
with password
3.4.3 Main menu
Page Function
Dashboard Display the main information on the configured system.
Configuration Define the configuration of the sensors and monitored area.
Validation Start the validation procedure.
Maintenance Start the wizard for periodic test.
Display the date of the next scheduled periodic test.
Display the performed periodic tests report.
Settings Configure the sensors.
Configure the auxiliary inputs and outputs function.
Update the firmware.
Perform the configuration back up and load a configuration.
Download the log.
Other general functions.
Ignore unsaved changes.
Login Enable access to the configuration functions. Password required.
3. Get to know LBK System
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4. Functioning principles
Contents
This section includes the following topics:
4.1 Sensor functioning principles 18
4.2 Safety functions 18
4.3 Access detection function 19
4.4 Restart prevention function 19
4.5 Muting 21
4.6 Anti-tampering function 22
4.7 Anti-masking function 23
4.1 Sensor functioning principles
4.1.1 Introduction
The LBK-S01 sensor is an FMCW (Frequency Modulated Continuous Wave) radar device based on a
proprietary detection algorithm. The sensor sends impulses and obtains information, analyzing the
reflection of the objects that it encounters.
4.1.2 Factors that influence the reflected signal
The signal reflected by the object depends on several characteristics of the same object:
lmaterial: metallic objects have a very high reflection coefficient, while paper and plastic reflect only a
small portion of the signal.
lsurface exposed to the sensor: the greater the surface exposed to the radar, the greater the reflected
signal.
lposition with respect to the sensor: objects positioned perfectly in front of the radar generate a greater
signal with respect to side objects.
lmotion speed: the faster the motion of the object, the greater the reflected signal
4.1.3 Signaled and missed objects
Many objects inside of an industrial environment reflect the radar signal. The signal analysis algorithm takes
into consideration only those objects that move within the field of vision, ignoring completely static objects.
Furthermore, a falling objects filtering algorithm allows ignoring false alarms generated by work waste
products that fall within the field of vision of the sensor.
4.2 Safety functions
4.2.1 Default operation
In LBK System‘s default operation all sensors perform both safety functions:
lthe sensor performs the access detection function ("Access detection function" on the next page)
when it is in normal operation (status No alarm)
lthe sensor performs the restart prevention function ("Restart prevention function" on the next page)
when in alarm state for access detection (status Alarm)
4.2.2 Selectable safety functions
In the manual system configuration via the Inxpect Safety application, you can select which safety functions
each sensor performs:
lBoth (default)
lAlways access detection: even when the system is in Alarm status, the sensor has the field of vision
and the sensitivity of the No alarm status.
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lAlways restart prevention: even when the system is in No alarm status, the sensor has the field of
vision and the sensitivity of the Alarm status
For example, if a sensor is set up with a 50° field of vision and always the access detection security function,
the sensor will still have a 50° field of vision both in the Alarm status and in the No alarm status.
WARNING! If the access detection function is always selected, additional safety measures must be
introduced to ensure the restart prevention function.
Note: in the linear barrier configuration, both functions are selected by default.
4.3 Access detection function
4.3.1 Description
The function de-energizes the safety relays and prevents the machinery from restarting if motion is detected
in the system stopping area.
For the access detection function the sensor can be set with a 50° or a 110° field of vision. For details, see
"Sensor field of vision" on page26.
WARNING! The stopping area may not correspond to the defined dangerous area according to the
risk assessment. Calculate the actual dimensions based on the field of vision of the single sensor
(see "Sensor position" on page25) and perform the validation of the function (see "Validate safety
functions" on page49). If necessary, implement additional safety measures.
Note: for linear barrier application, the stopping area is calculated automatically by the Inxpect Safety application based on the set
dimensions of the dangerous area and the configuration of the sensors.
4.3.2 Pre-alarm area
A pre-alarm area can be configured, where if the machinery is functioning and the system detects motion,
the dedicated auxiliary output relay closes. For example, this is useful for connecting a light or acoustic
signal. The pre-alarm area is defined through the Inxpect Safety application.
4.4 Restart prevention function
4.4.1 Description
The function maintains safety relays de-energized and prevents the machinery from restarting if motion is
detected in the system stopping area.
The function detects movements of just a few millimeters, such as breathing movements (with normal
breathing or apnea of no more than 5 seconds), and the movements necessary for a person to remain in
balance in an upright or squatting position.
WARNING! The stopping area may not correspond to the defined dangerous area according to the
risk assessment. Calculate the actual dimensions based on the field of vision of the single sensor
(see "Sensor position" on page25) and perform the validation of the function (see "Validate safety
functions" on page49). If necessary, implement additional safety measures.
Note: for linear barrier application, the stopping area is calculated automatically by the Inxpect Safety application based on the set
dimensions of the dangerous area and the configuration of the sensors.
4.4.2 Function limits
The coverage of the restart prevention function is defined by the geometry of the field of vision. The field of
vision of the sensor depends on the inclination and height of the sensor installation, see "Sensor position" on
page25.
For the restart prevention function, a sensor set with 50° field of vision has the same coverage as the 110°
field of vision.
NOTICE: during the configuration phase, take this aspect into consideration to avoid generating false alarms.
4.4.3 Cases of non-guaranteed function
Function is not guaranteed in the following cases:
4. Functioning principles
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lthere are objects that limit or prevent the sensor from detecting movement, particularly if the limitation
lasts longer than the delay time set (parameter Restart time out).
lthe sensor does not detect a sufficient portion of the body, for example if it detects the limbs but not the
torso of a person sitting [A], lying [B] or leaning [C].
WARNING! The position of the person is determined by the position of his or her center of
gravity. This function is not guaranteed if a person has body parts within the sensor's field of
vision but the axis of the person’s center of gravity is outside that field.
Only when there are no restrictions does the function ensure that a person is detected when standing up [D].
4.4.4 Types of managed restart
NOTICE: it is the responsibility of the machinery designer to assess if automatic restart prevention can guarantee the
same level of safety as manual restart (as defined in standard EN ISO 13849-1:2015, section 5.2.2).
The system manages three types of restart prevention:
Type Conditions for enabling machinery restart
Automatic The time interval set through the Inxpect Safety application has passed since the last
motion detection*.
Manual The status of the restart enable button indicates that the restart is enabled (digital
input status = 1).
4. Functioning principles