Banner EZ-SCREEN LS2 30-150Q8 Series User manual

EZ-SCREEN®Type 2 Light Screen
Instruction Manual
Original Instructions
122452 Rev. H
19 February 2021
©Banner Engineering Corp. All rights reserved
122452

Contents
1 About This Document .................................................................................................................................................. 4
1.1 Important... Read This Before Proceeding! ......................................................................................................................................4
1.1.1 Use of Warnings and Cautions .................................................................................................................................................4
1.2 EU Declaration of Conformity (DoC) ................................................................................................................................................4
2 Introduction ...................................................................................................................................................................5
2.1 Features ..........................................................................................................................................................................................5
2.2 System Description ......................................................................................................................................................................... 5
2.3 Appropriate Applications and Limitations ........................................................................................................................................6
2.3.1 Examples: Appropriate Applications ........................................................................................................................................7
2.3.2 Examples: Inappropriate Applications ..................................................................................................................................... 7
2.4 Control Reliability and Safety Categories .........................................................................................................................................8
2.5 Operating Features .......................................................................................................................................................................... 8
2.5.1 Trip/Latch Output .....................................................................................................................................................................8
2.5.2 Wiring Options for Emitter/Receiver Swapability ..................................................................................................................... 9
2.5.3 Manual Reset/Remote Test Input and EDM ............................................................................................................................9
2.5.4 Status Indicators ....................................................................................................................................................................10
3 Mechanical Installation ............................................................................................................................................... 11
3.1 Mechanical Installation Considerations .........................................................................................................................................11
3.1.1 Calculating the Safety Distance (Minimum Distance) .............................................................................................................11
3.1.2 Reducing or Eliminating Pass-Through Hazards ...................................................................................................................14
3.1.3 Supplemental Safeguarding .................................................................................................................................................. 15
3.1.4 Other Considerations ..............................................................................................................................................................15
3.2 Mounting System Components ......................................................................................................................................................19
3.2.1 Overview of Emitter/Receiver Mounting Hardware .................................................................................................................19
3.2.2 Mounting and Initial Alignment of Emitter/Receiver Pairs .......................................................................................................20
4 Electrical Installation and Testing ..............................................................................................................................23
4.1 Routing Cordsets ........................................................................................................................................................................... 23
4.2 Initial Electrical Connections ......................................................................................................................................................... 24
4.2.1 Sensor Interchangeability ...................................................................................................................................................... 24
4.3 Initial Checkout Procedure .............................................................................................................................................................25
4.3.1 Configuring the System for Initial Checkout .......................................................................................................................... 25
4.3.2 Initial Power-Up ..................................................................................................................................................................... 26
4.3.3 Optical Alignment .................................................................................................................................................................. 26
4.3.4 Optical Alignment Procedure with Mirrors ............................................................................................................................. 28
4.3.5 Trip Test ................................................................................................................................................................................ 28
4.4 Electrical Connections to the Guarded Machine ...........................................................................................................................29
4.4.1 OSSD Output Connections ....................................................................................................................................................30
4.4.2 FSD Interfacing Connections .................................................................................................................................................30
4.4.3 Machine Primary Control Elements and EDM Input ............................................................................................................... 31
4.4.4 Manual Reset/Remote Test Input and EDM ..........................................................................................................................31
4.4.5 Preparing for System Operation ............................................................................................................................................ 33
4.5 Wiring Diagrams .............................................................................................................................................................................33
4.5.1 Generic Emitter Wiring Diagram ............................................................................................................................................33
4.5.2 Generic Wiring to FSDs (manual reset) .................................................................................................................................34
4.5.3 Generic Wiring — Interface Module (2-Channel EDM, Manual Reset) ................................................................................. 35
5 System Operation ....................................................................................................................................................... 36
5.1 Security Protocol ...........................................................................................................................................................................36
5.2 Reset Procedures ......................................................................................................................................................................... 36
5.2.1 Receiver Resets .................................................................................................................................................................... 36
5.2.2 Resetting the Emitter .............................................................................................................................................................. 36
5.3 Status Indicators ........................................................................................................................................................................... 36
5.3.1 Receiver ................................................................................................................................................................................ 37
5.3.2 Emitter ................................................................................................................................................................................... 37
5.4 Normal Operation ..........................................................................................................................................................................38
5.4.1 System Power-Up ..................................................................................................................................................................38
5.4.2 Run Mode .............................................................................................................................................................................. 38
5.4.3 Manual Reset Procedure .......................................................................................................................................................38
6 Troubleshooting ......................................................................................................................................................... 39
6.1 Troubleshooting and Lockout Conditions ......................................................................................................................................39
6.2 Recovery Procedures ....................................................................................................................................................................39
6.2.1 Receiver (System Reset) .......................................................................................................................................................39
6.2.2 Emitter Reset .........................................................................................................................................................................39
6.3 Electrical and Optical Noise .......................................................................................................................................................... 40
EZ-SCREEN® Type 2 Light Screen

6.3.1 Check for Sources of Electrical Noise ................................................................................................................................... 40
6.3.2 Check for Sources of Optical Noise .......................................................................................................................................41
7 Product Support and Maintenance ........................................................................................................................... 42
7.1 Cleaning ........................................................................................................................................................................................42
7.2 Manufacturing Date .......................................................................................................................................................................42
7.3 Warranty Service ...........................................................................................................................................................................42
7.4 Disposal ......................................................................................................................................................................................... 42
7.5 Banner Engineering Corp Limited Warranty ................................................................................................................................. 42
7.6 Contact Us ..................................................................................................................................................................................... 43
8 Checkout Procedures ..................................................................................................................................................44
8.1 Schedule of Checkouts ................................................................................................................................................................. 44
8.2 Commissioning Checkout ............................................................................................................................................................. 44
9 Specifications and Accessories ................................................................................................................................46
9.1 Specifications ................................................................................................................................................................................46
9.1.1 General Specifications ...........................................................................................................................................................46
9.1.2 Emitter Specifications ............................................................................................................................................................ 46
9.1.3 Receiver Specifications ......................................................................................................................................................... 46
9.1.4 Emitter and Receiver Dimensions .......................................................................................................................................... 47
9.1.5 Bracket Dimensions ................................................................................................................................................................47
9.2 Accessories ....................................................................................................................................................................................49
9.2.1 Accessories ........................................................................................................................................................................... 49
9.2.2 Cordsets ................................................................................................................................................................................. 49
9.2.3 Interface Modules .................................................................................................................................................................. 51
9.2.4 Contactors .............................................................................................................................................................................. 52
9.2.5 Safety Controllers ................................................................................................................................................................... 52
9.2.6 Lens Shield .............................................................................................................................................................................52
9.2.7 EZ-LIGHT® for EZ-SCREEN®................................................................................................................................................52
9.2.8 MSA Series Stands ............................................................................................................................................................... 53
9.2.9 MSM Series Corner Mirrors ...................................................................................................................................................53
9.2.10 SSM Series Corner Mirrors ................................................................................................................................................. 54
9.2.11 Accessory Mounting Brackets ............................................................................................................................................. 56
9.2.12 Alignment Aids .....................................................................................................................................................................57
9.2.13 Replacement Parts .............................................................................................................................................................. 57
9.2.14 Documentation .................................................................................................................................................................... 57
10 Standards and Regulations ...................................................................................................................................... 58
10.1 Applicable U.S. Standards ........................................................................................................................................................... 58
10.2 OSHA Regulations .......................................................................................................................................................................58
10.3 International/European Standards ............................................................................................................................................... 59
11 Glossary .................................................................................................................................................................... 60
EZ-SCREEN® Type 2 Light Screen

1 About This Document
1.1 Important... Read This Before Proceeding!
It is the responsibility of the machine designer, controls engineer, machine builder, machine operator, and/or maintenance
personnel or electrician to apply and maintain this device in full compliance with all applicable regulations and standards. The
device can provide the required safeguarding function only if it is properly installed, properly operated, and properly
maintained. This manual attempts to provide complete installation, operation, and maintenance instruction. Reading the
manual in its entirety is highly recommended to ensure proper understanding of the operation, installation, and maintenance.
Please direct any questions regarding the application or use of the device to Banner Engineering Corp..
For more information regarding U.S. and international institutions that provide safeguarding application and safeguarding
device performance standards, see Standards and Regulations on p. 58.
WARNING:
•The user is responsible for following these instructions.
•Failure to follow any of these responsibilities may potentially create a dangerous condition
that could result in serious injury or death.
• Carefully read, understand, and comply with all instructions for this device.
• Perform a risk assessment that includes the specific machine guarding application. Guidance on a
compliant methodology can be found in ISO 12100 or ANSI B11.0.
• Determine what safeguarding devices and methods are appropriate per the results of the risk
assessment and implement per all applicable local, state, and national codes and regulations. See
ISO 13849-1, ANSI B11.19, and/or other appropriate standards.
• Verify that the entire safeguarding system (including input devices, control systems, and output
devices) is properly configured and installed, operational, and working as intended for the
application.
• Periodically re-verify, as needed, that the entire safeguarding system is working as intended for
the application.
1.1.1 Use of Warnings and Cautions
The precautions and statements used throughout this document are indicated by alert symbols and must be followed for the
safe use of the EZ-SCREEN Type 2 Light Screen. Failure to follow all precautions and alerts may result in unsafe use or
operation. The following signal words and alert symbols are defined as follows:
Signal Word Definition Symbol
WARNING: Warnings refer to potentially hazardous situations which, if not avoided, could
result in serious injury or death.
CAUTION: Cautions refer to potentially hazardous situations which, if not avoided, could
result in minor or moderate injury.
These statements are intended to inform the machine designer and manufacturer, the end user, and maintenance personnel,
how to avoid misapplication and effectively apply the EZ-SCREEN Type 2 Light Screen to meet the various safeguarding
application requirements. These individuals are responsible to read and abide by these statements.
1.2 EU Declaration of Conformity (DoC)
Banner Engineering Corp. herewith declares that these products are in conformity with the provisions of the listed directives
and all essential health and safety requirements have been met. For the complete DoC, please go to
www.bannerengineering.com.
Product Directive
EZ-SCREEN Type 2 Light Screen 2006/42/EC
Representative in EU: Peter Mertens, Managing Director, Banner Engineering BV. Address: Park Lane, Culliganlaan 2F, bus
3,1831 Diegem, Belgium.
EZ-SCREEN® Type 2 Light Screen
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2 Introduction
2.1 Features
• An optoelectronic safeguarding device
•Creates a screen of synchronized, modulated infrared sensing beams;
choose from 10 sizes, in 150 mm (6 in) increments and defined areas from
150 mm to 1.8 m (6 in to 71 in)
• Compact package for smaller production machines
• Models available with Trip or Latch output operation (automatic or manual
start/restart)
• 30 mm (1.18 in) resolution
• Remote Test input terminals for simulating a "blocked" condition
• Operating range up to 15 m (50 ft)
• Type 2 per IEC 61496-1/-2; Category 2 PLc per EN ISO 13849-1
• FMEA tested according to IEC 61496-1, Type 2 requirements
• Receiver LEDs provide system status and emitter/receiver alignment
indications
• Highly immune to EMI, RFI, ambient light, weld flash, and strobe light
• Two-piece design
• Vibration-tolerant, factory burned-in emitter and receiver circuitry for
toughness and dependability
2.2 System Description
Note: This manual refers to an emitter and its receiver, and their cabling as "a System".
Banner EZ-SCREEN Type 2 emitters and receivers provide a redundant, microprocessor-controlled, opposed-mode
optoelectronic "curtain of light", or "light screen". EZ-SCREEN Type 2 typically is used for point-of-operation safeguarding,
and is suited to safeguard a variety of lower-risk machinery.
The EZ-SCREEN Type 2 is a two-piece (two-box) system comprising an emitter and a receiver, but no external controller.
The external device monitoring (EDM) function ensures the fault detection capability required by EN ISO 13849-1 Category
2.
The EZ-SCREEN Type 2 emitters have a row of synchronized modulated infrared (invisible) light-emitting diodes (LEDs) in a
compact metal housing. Receivers have a corresponding row of synchronized photodetectors. The light screen created by
the emitter and receiver is called the defined area; its width and height are determined by the length of the sensor pair and
the distance between them. The maximum range is 15 m (50 ft), which decreases if corner mirrors are used. Resolution is 30
mm (1.18 in).
Both emitter and receiver feature LEDs to provide continuous indication of the System’s operating status, alignment and error
conditions.
In typical operation, if any part of an operator’s body (or any opaque object) of more than a pre-determined cross section is
detected, the solid-state Output Signal Switching Device (OSSD) safety outputs turn OFF. These safety outputs are
connected to the guarded machine’s Final Switching Devices (FSDs) that control the machine primary control elements
(MPCEs), which immediately stop the motion of the guarded machine.
Both OSSD outputs must be connected to the machine control so that the machine’s safety-related control system interrupts
the circuit or power to the MPCEs (Machine Primary Control Elements), resulting in a non-hazardous condition. Each OSSD
is capable of sourcing 0.5A at +24V dc.
EZ-SCREEN® Type 2 Light Screen
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EZ-SCREEN Type 2 is extensively FMEA (Failure Mode and Effects Analysis) tested to IEC 61496-1/-2 requirements. The
design of the EZ-SCREEN Type 2 has considered all single faults such that a loss of a critical safety function will result in a
stop command and a lockout condition. In the event of an accumulation of undetected faults, a remote external test (or
check) is required to maintain the safety function.
Electrical connections are made through M12 (or Euro-style)
quick-disconnects. An optional hookup that provides sensor
interchangeability (or “swapability”) – the ability to install
either sensor at either QD connection – is possible. Using a
parallel connection (color-for-color), the emitter cable can be
connected to the receiver cable, providing the ability to swap
the emitter and receiver position. This hookup option
provides advantages during installation, wiring, and
troubleshooting.
All models require a supply voltage of +24V dc ±20%.
Figure 1. Banner EZ-SCREEN Type 2: emitter, receiver, and two
interconnecting cables
Quick-Disconnect
Cables
M12 QD
Fittings
Defined
Area
Emitter
Specified Test Piece
Synchronization
Beam
Receiver
Status
Indicators
2.3 Appropriate Applications and Limitations
WARNING: Read this Section Carefully Before Installing the System
If all mounting, installation, interfacing, and checkout procedures are not followed properly, the Banner
device cannot provide the protection for which it was designed. The user is responsible for ensuring that
all local, state, and national laws, rules, codes, or regulations relating to the installation and use of this
control system in any particular application are satisfied. Ensure that all legal requirements have been met
and that all technical installation and maintenance instructions contained in this manual are followed.
The user has the sole responsibility to ensure that this Banner device is installed and interfaced to the
guarded machine by Qualified Persons 1, in accordance with this manual and applicable safety
regulations. Failure to follow these instructions could result in serious injury or death.
The Banner EZ-SCREEN Type 2 is intended for lower-risk machine guarding and other safeguarding applications, as
determined by a risk assessment. It is the user’s responsibility to verify whether the safeguarding is appropriate for the
application and is installed, as instructed by this manual, by a Qualified Person.
The EZ-SCREEN Type 2 ability to perform its safeguarding function depends upon the appropriateness of the application
and upon its proper mechanical and electrical installation and interfacing to the guarded machine. If all mounting,
installation, interfacing, and checkout procedures are not followed properly, the EZ-SCREEN Type 2 cannot provide
the protection for which it was designed.
1A person who, by possession of a recognized degree or certificate of professional training, or who, by extensive knowledge, training and
experience, has successfully demonstrated the ability to solve problems relating to the subject matter and work.
EZ-SCREEN® Type 2 Light Screen
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WARNING:
•Install System Only on Appropriate Applications
•Failure to follow these instructions could result in serious injury or death.
• Use Banner's EZ-SCREEN Type 2 only on machinery that can be stopped immediately after a
stop signal is issued at any point in the machine's stroke or cycle, such as part-revolution clutched
machines. Under no circumstances may the EZ-SCREEN Type 2 be used on full-revolution
clutched machinery or in unsuitable applications.
• If there is any doubt about whether or not your machinery is compatible with the EZ-SCREEN
Type 2, contact Banner Engineering.
WARNING:
•Use of EZ-SCREEN Type 2
•Failure to follow these instructions could result in serious bodily injury or death.
• EZ-SCREEN Type 2 meets the Type 2 requirements of IEC 61496 and Category 2 PLd
requirements of EN ISO 13849-1. DO NOT use EZ-SCREEN Type 2 unless it is installed, tested,
and inspected in accordance with this manual. DO NOT use EZ-SCREEN Type 2 where Control
Reliability is required, or where Category 3, Category 4, or Type 4 AOPD (active opto-electronic
protective device) have been mandated, or where a risk assessment has determined that frequent
access by personnel to the hazard could result in an irreversible or serious injury (for example,
OSHA reportable injury).
• Typical use is for safeguarding in situations where the consequence of an accident will result in
only slight (normally reversible) injuries that are typically treated by the normal healing processes
and minor medical treatment (that is, first aid, as defined by OSHA 29CFR1904.7).
2.3.1 Examples: Appropriate Applications
EZ-SCREEN Type 2 are typically used for, but is not limited to, the following applications (dependent on machine risk
assessment):
•Small assembly equipment
• Automated production equipment
• "Table-top" robotic work cells
• Component insertion/"pick-and-place" machines
• Small packaging machines
• Equipment and process protection (non-personnel safety)
• Applications that could result in only slight (normally reversible) injuries (such as bump, bruise, knock-down, trapping
but not crushing, minor cuts and abrasions, etc.)
2.3.2 Examples: Inappropriate Applications
Do not use EZ-SCREEN Type 2 in the following applications:
• As a primary safeguard in frequently accessed hazardous situations that could result in serious injuries (normally
irreversible, including death)
• In any case where Control Reliability, Category 3, Category 4, PL d, PL e, or Type 4 AOPD (active opto-electronic
protective device) have been mandated. See EN ISO 13849-1, IEC 61496-1, or other appropriate standard
• With any machine that cannot be stopped immediately after a stop signal is issued, such as single-stroke (or full-
revolution) clutched machinery
• With any machine with inadequate or inconsistent machine response time and stopping performance
• With any machine that ejects materials or component parts through the defined area
• In any environment that is likely to adversely affect photoelectric sensing efficiency. For example, corrosive chemicals
or fluids or unusually severe levels of smoke or dust, if not controlled, may degrade sensing efficiency
• As a tripping device to initiate or reinitiate machine motion (PSDI applications), unless the machine and its control
system fully comply with the relevant standard or regulation (see OSHA 29CFR1910.217, ANSI/NFPA 79, ANSI
B11.19, ISO 12100, IEC 60204-1, IEC 61496-1, or other appropriate standard)
If an EZ-SCREEN Type 2 is installed for use as a perimeter guard (where a pass-through hazard may exist, see Reducing or
Eliminating Pass-Through Hazards on p. 14), the dangerous machine motion can be initiated by normal means only after
the safeguarded area is clear of individuals and the EZ-SCREEN Type 2 has been manually reset.
EZ-SCREEN® Type 2 Light Screen
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2.4 Control Reliability and Safety Categories
To summarize the expected safety circuit performance in high-risk situations, requirements of Control Reliability (OSHA
29CFR1910.217 and ANSI B11.19) and Category 3 or 4 and PL d or PL e (EN ISO 13849-1) demand that a reasonably
foreseeable, single failure does not lead to the loss of the safety function, and does not prevent a normal or immediate stop
from occurring. The failure or the fault must be detected at or before the next demand of safety (e.g., at the beginning or end
of a cycle, or when a safeguard is actuated). The safety-related part of the control system then must issue an immediate stop
command, or prevent the next machine cycle or hazardous situation until the failure or fault is corrected.
The effect of ANSI B11.19, and EN ISO 13849-1 is to set a baseline for situations in which a minimum level of performance
has been mandated or in cases where a risk assessment has determined a need for Control Reliability, Category 3 or
Category 4 level of performance.
In lower-risk safety applications, safeguards and safety circuits do not require the level of performance and fault tolerance
described by Control Reliability, Category 3 or 4 and PL d or PL e. Applications involving situations that could result in a
slight or normally reversible injury (e.g., only requiring first aid, as defined by OSHA 29CFR1904) can be solved by EN ISO
13849-1 Category 2 PL c.
EN ISO 13849-1 Category 2 does not require the same level of performance and fault tolerance as required by Control
Reliability, Category 3 or Category 4. Safety-related parts of control systems designed to Category 2 “shall be designed so
that their function(s) are checked at suitable intervals by the machine control system.” This allows a single fault to lead to the
loss of the safety function between the check [test] of the system, but the loss of safety function is detected by the check. By
comparison, in a system designed to EN ISO 13849-1 Category 4, a single fault or an accumulation of faults will not lead to a
loss of the safety function.
While EN ISO 13849-1 generally applies to the machine level, IEC61496-1/-2 specifies requirements for the design,
construction and testing for two levels or “types” of active opto-electronic protective devices (AOPDs) or light curtains (light
screens). “Type 2” and “Type 4” describe differing requirements to ensure that appropriate safety-related performance is
achieved. The appropriate type is dependent on the overall degree of risk reduction, as determined by the machine’s Risk
Assessment (see ISO 12100, ANSI B11.19, or other relevant standard).
A Type 2 AOPD relies on periodic testing to detect a failure to danger. Between tests, a single fault can result in the loss of
the safety function. While this level of performance and fault tolerance is generally not allowed in Category 4 situations, it is
acceptable in the lower-risk situations described by Category 2.
While the EZ-SCREEN Type 2 conducts continual internal self-tests and all single faults have been considered, the
installation should provide an additional periodic test/check of the EZ-SCREEN Type 2 and its interface to ensure the
integrity of the safety function (see Manual Reset/Remote Test Input and EDM on p. 31). A component failure detected by
periodic test/check must cause a “stop” signal to be sent to the guarded machine and put the System into a Lockout
condition.
Recovery from this type of Lockout condition requires:
• Replacement of the failed component (to restore the safety function)
• The appropriate reset procedure.
2.5 Operating Features
The Banner EZ-SCREEN Type 2 Light Screen models described by this manual feature standard functions:
• Trip or Latch Output (depending on model)
• External Device Monitoring (EDM) via the Test/Retest input
The System Response Time (Tr) can be determined by the model number on the emitter and receiver.
2.5.1 Trip/Latch Output
Whether a receiver features Trip or Latch Output determines whether the System will enter RUN mode automatically after
power-up, or if it will require a manual reset first. If the System has Trip Output, other measures must be taken to prevent a
pass-through hazard.
For Latch Output models, the EZ-SCREEN Type 2 requires a manual reset for the OSSD outputs to turn ON, after power is
applied and all beams are clear.
• For Trip Output models, the OSSD outputs will turn ON after power is applied and the receiver passes its internal
self-test/synchronization and recognizes that all beams are clear. Trip Output models will also turn on after all beams
are cleared following a blocked beam.
• For Latch Output models, the EZ-SCREEN Type 2 requires a manual reset for the OSSD outputs to turn ON,
whenever power is applied and all beams are clear.
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WARNING: Use of Auto (Trip) or Manual (Latch) Start/Restart
Application of power to the Banner device, the clearing of the sensing field, or the reset of a manual start/
restart (latch) condition MUST NOT initiate dangerous machine motion. Machine control circuitry must be
designed so that one or more initiation devices must be engaged (in a conscious act) to start the machine
– in addition to the Banner device going into Run mode. Failure to follow these instructions could
result in serious injury or death.
2.5.2 Wiring Options for Emitter/Receiver Swapability
Each EZ-SCREEN Type 2 sensor can be connected to its own power supply or, color-for-color to the other sensor’s cable.
The color-for-color hookup allows the emitter and receiver positions to be interchanged without rewiring (functionality known
as sensor " swapability"). Model CSB.. splitter cordsets and DEE2R.. double-ended cables facilitate interconnection between
an EZ-SCREEN Type 2 receiver and emitter, providing a single "homerun" cable for optional swapable hookup.
Individual Cordsets Splitter Cordsets
Bn
Or/Bk
Or
Wh
Bk
Bu
Gn/Ye
Vi
+24V dc
C
n.c.
n.c.
OSSD2
OSSD1
0V dc
Ground
Reset/Test & EDM
AB
D
C
AB
Key Description
A Emitter
B Receiver
C QDE-8..D Cordsets
Key Description
A Emitter
B Receiver
C DEE2R.. Cordsets
D CSB.. Cordsets
2.5.3 Manual Reset/Remote Test Input and EDM
A single input provides the means to reset the system from a latch or lockout condition, to externally test the light screen and
its interface, and to monitor external devices (EDM) for proper operation. If the System is in Run condition with outputs ON,
operating the switch results in a test. If the System is Latched or Locked Out, operating the switch results in a reset.
External Device Monitoring (EDM)
This feature allows the EZ-SCREEN Type 2 system to monitor the status of external devices such as MPCEs. A normally
closed and a normally open contact from each monitored device are wired in series-parallel to detect if one of the devices
fails.
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2.5.4 Status Indicators
Status indicators on both the emitter and receiver are clearly visible on each sensor’s front panel.
Figure 2. EZ-SCREEN Type 2 emitter and receiver status indicators
Power/Fault LED (Green)
Alignment LEDs
(Yellow)
Status Blocked LED (Red)
Status Clear LED (Green)
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3 Mechanical Installation
The EZ-SCREEN Type 2 system performance as a safety guarding device depends on:
•The suitability of the application
• The proper mechanical and electrical installation and interfacing to the guarded machine
WARNING: Read this Section Carefully Before Installing the System
If all mounting, installation, interfacing, and checkout procedures are not followed properly, the Banner
device cannot provide the protection for which it was designed. The user is responsible for ensuring that
all local, state, and national laws, rules, codes, or regulations relating to the installation and use of this
control system in any particular application are satisfied. Ensure that all legal requirements have been met
and that all technical installation and maintenance instructions contained in this manual are followed.
The user has the sole responsibility to ensure that this Banner device is installed and interfaced to the
guarded machine by Qualified Persons 2, in accordance with this manual and applicable safety
regulations. Failure to follow these instructions could result in serious injury or death.
3.1 Mechanical Installation Considerations
The two primary factors that influence the layout of the EZ-SCREEN Type 2 system mechanical installation are the Safety
Distance (Minimum Distance) and the supplemental safeguarding/eliminating pass-through hazards. Other considerations
include:
•Emitter and Receiver Orientation
• Adjacent Reflective Surfaces
• Use of Corner Mirrors
• Installation of Multiple Systems
WARNING:
•Position the System Components Carefully
•Failure to observe this warning could result in serious injury or death.
• Position the system components such that the hazard cannot be accessed by reaching over,
under, around, or through the sensing field. Additional and supplemental guarding may be
required.
3.1.1 Calculating the Safety Distance (Minimum Distance)
Safety Distance (Ds), also called Minimum Distance (S), is the minimum distance required between the defined area and the
closest reachable hazard point. The distance is calculated so that when an object or a person is detected (by blocking a
sensing beam), the EZ-SCREEN Type 2 sends a stop signal to the machine, causing it to stop by the time the object or
person can reach any machine hazard point.
The distance is calculated differently for U.S. and European installations. Both methods take into account several factors,
including a calculated human speed, the total system stopping time (which itself has several components), and the depth
penetration factor. After the distance has been determined, record the calculated distance on the Daily Checkout Card.
WARNING:
•Calculate the Safety Distance (Minimum Distance)
•Failure to establish and maintain the safety distance (minimum distance) could result in serious
injury or death.
• Mount the components at a distance from the nearest hazard such that an individual cannot reach
the hazard before cessation of the hazardous motion or situation. Calculate this distance using the
supplied formulas, as described by ANSI B11.19 and ISO 13855. Mount the components more
than 100 mm (4 in) away from the hazard, regardless of the calculated value.
2A person who, by possession of a recognized degree or certificate of professional training, or who, by extensive knowledge, training and
experience, has successfully demonstrated the ability to solve problems relating to the subject matter and work.
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Figure 3. Safety distance (minimum distance) and hard (fixed) guarding
Hard (fixed) Guarding
Reset Switch
Nearest Hazard Point
Robot
Turn-
Table
Hard (fixed)
Guarding
Safety Light Curtain/Screen
Models With Response Times
Models (see note below) Defined Area Height Number of Beams Response Time (Tr)
LS2..30-150Q8 150 mm (5.9 in) 8 11 ms
LS2..30-300Q8 300 mm (11.8 in) 16 13 ms
LS2..30-450Q8 450 mm (17.7 in) 24 14 ms
LS2..30-600Q8 600 mm (23.6 in) 32 16 ms
LS2..30-750Q8 750 mm (29.5 in) 40 17 ms
LS2..30-900Q8 900 mm (35.4 in) 48 19 ms
LS2..30-1050Q8 1050 mm (41.3 in) 56 21 ms
LS2..30-1200Q8 1200 mm (47.2 in) 64 22 ms
LS2..30-1350Q8 1350 mm (53.1 in) 72 24 ms
LS2..30-1500Q8 1500 mm (59 in) 80 25 ms
LS2..30-1650Q8 1650 mm (65 in) 88 27 ms
LS2..30-1800Q8 1800 mm (70.9 in) 96 29 ms
Note: The .. in the model numbers is one of the following:
•E = Emitter
•TR = Trip-Output Receiver
•LR = Latch-Output Receiver
•TP = Trip-Output Emitter/Receiver Pair
•LP = Latch-Output Emitter/Receiver Pair
Pair model numbers end in 88 (for example, LS2TP30-150Q88) to indicate that both the transmitter and
receiver have an 8-pin connector.
Formula and Examples
U.S. Applications European Applications
The Safety (Separation) Distance formula for U.S. applications:
Ds = K × (Ts + Tr) + Dpf
The Minimum Distance formula for European applications:
S = (K × T) + C
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U.S. Applications European Applications
Ds
the Safety Distance, in inches
K
1600 mm per second (or 63 in per second), the OSHA
29CFR1910.217, and ANSI B11.19 recommended hand-speed
constant (see Note 1 below)
Ts
the overall stop time of the machine (in seconds) from the initial
stop signal to the final ceasing of all motion, including stop times of
all relevant control elements (for example, IM-T-.. Interface
Modules) and measured at maximum machine velocity (see Note 3
below)
Tr
the maximum response time, in seconds, of the EZ-SCREEN Type
2 emitter/receiver pair (depending on model)
Dpf
the added distance due to the depth penetration factor as
prescribed in OSHA 29CFR1910.217, and ANSI B11.19 for U.S.
applications.
Calculate using the formula: Dpf = 3.4 × (d – 7) where d is the
resolution of the light curtain (for d < 64 mm). For EZ-SCREEN
Type 2, d = 30 mm and Dpf = 78 mm (3 in).
S
the Minimum Distance, in mm, from danger zone to light screen
center line; minimum allowable distance is 100 mm ( 175 mm for
non-industrial applications), regardless of calculated value
K
hand-speed constant (see Note 2 below); 2000 mm/s (for Minimum
Distances < 500 mm) 1600 mm/s (for Minimum Distances > 500
mm)
T
the overall machine stopping response time (in seconds), from the
physical initiation of the safety device and the machine coming to a
stop (or the hazard removed). This can be broken down into two
parts: Ts and Tr where T = Ts + Tr
C
the additional distance, in mm, based on intrusion of a hand or
object towards the danger zone prior to actuation of a safety
device. Calculate using the formula (in mm):
C = 8 × (d - 14)
where d is the resolution of the light curtain (for d ≤ 40 mm). For
EZ-SCREEN Type 2, d = 30 mm and C = 128 mm (5 in).
Notes:
1. The OSHA-recommended hand speed constant K has been determined by various studies and, although
these studies indicate speeds of 1600 mm/sec. (63 in/sec.) to more than 2500 mm/sec. (100 in/sec.), they
are not conclusive determinations. Consider all factors, including the physical ability of the operator, when
determining the value of K to be used.
2. The recommended hand speed constant K, derived from data on approach speeds of the body or parts of
the body as stated in ISO 13855.
3. Ts is usually measured by a stop-time measuring device. If the machine manufacturer's specified stop time is
used, at least 20% should be added to allow for possible clutch/ brake system deterioration. This
measurement must take into account the slower of the two MPCE channels, and the response time of all
devices or controls that react to stop the machine.
WARNING:
•Stop time (Ts) must include the response time of all devices or controls that react to stop
the machine
•If all devices are not included, the calculated safety distance (Ds or S) will be too short, which can
lead to serious injury or death.
• Include the stop time of all relevant devices and controls in your calculations.
• If required, each of the two machine primary control elements (MPCE1 and MPCE2) must be
capable of immediately stopping the dangerous machine motion, regardless of the state of the
other. These two channels of machine control need not be identical, but the stop time performance
of the machine (Ts, used to calculate the safety distance) must take into account the slower of the
two channels.
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Examples
Example: U.S. Applications, Model
K= 63 in. per second (the hand speed constant set by OSHA)
Ts = 0.32 (0.250 second is specified by the machine
manufacturer; plus 20% safety factor; plus 20 ms for
interface module IM-T-9A response time)
Tr = 0.016 seconds (the specified response time of an
LS2..30-600 EZ-SCREEN Type 2)
Dpf = 3 in
Substitute the numbers into the formula as follows:
Ds = K × ( Ts + Tr ) + Dpf
Mount the EZ-SCREEN Type 2 emitter and receiver so that no part of the
defined area will be closer than 24.2 in. to the closest reachable hazard
point on the guarded machine.
Example: European Applications, Model
K= 1600 mm per second
T= 0.336 (0.250 second specified by machine manufacturer;
plus 20% safety factor; plus 20 ms interface module
response time), plus 0.016 seconds (the specified
LS2..30-600 response time)
C= 8 x (30 - 14) = 128 mm (14 mm resolution)
Substitute the numbers into the formula as follows:
S = (K × T ) + C
S = (1600 x 0.336) + 128 = 665.6 mm
Mount the EZ-SCREEN Type 2 emitter and receiver so that no part of
the defined area will be closer than 665.6 mm to the closest reachable
hazard point on the guarded machine.
3.1.2 Reducing or Eliminating Pass-Through Hazards
A pass-through hazard is associated with applications where personnel may pass through a safeguard, such as the EZ-
SCREEN Type 2 Light Screen (which issues a stop command to remove the hazard), and then continues into the guarded
area. This is common in access and perimeter guarding applications. Subsequently, their presence is no longer detected,
and the related danger becomes the unexpected start or restart of the machine while personnel are within the guarded area.
A pass-through hazard typically results from large safety distances calculated from long stopping times, large minimum
object sensitivities, reach-over, reach-through, or other installation considerations. A pass-through hazard can be generated
with as little as 75 mm (3 in) between the sensing field and the machine frame or hard (fixed) guarding.
Eliminate or reduce pass-through hazards whenever possible. While it is recommended to eliminate the pass-through hazard
altogether, this may not be possible due to machine layout, machine capabilities, or other application considerations.
One solution is to ensure that personnel are continually sensed while within the hazardous area. This can be accomplished
by using supplemental safeguarding, such as described by the safety requirements in ANSI B11.19 or other appropriate
standards.
An alternative method is to ensure that once the safeguarding device is tripped it will latch and will require a deliberate
manual action to reset. This method of safeguarding relies upon the location of the reset switch as well as safe work
practices and procedures to prevent an unexpected start or restart of the guarded machine. The EZ-SCREEN Type 2 Light
Screen provides a configurable Manual Start/Restart (Latch Output) function for these applications.
WARNING:
•Use of the Banner device for Access or Perimeter Guarding
•Failure to observe this warning could result in serious injury or death.
• If a Banner device is installed in an application that results in a pass-through hazard (for example,
perimeter guarding), either the Banner device or the Machine Primary Control Elements (MPCEs)
of the guarded machine must cause a Latched response following an interruption of the defined
area.
• The reset of this Latched condition may only be achieved by actuating a reset switch that is
separate from the normal means of machine cycle initiation.
WARNING:
•Perimeter guarding applications
•Failure to observe this warning could result in serious injury or death.
• Use lockout/tagout procedures per ANSI Z244.1, or use additional safeguarding as described by
ANSI B11.19 safety requirements or other applicable standards if a passthrough hazard cannot be
eliminated or reduced to an acceptable level of risk.
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3.1.3 Supplemental Safeguarding
Properly position the EZ-SCREEN Type 2 such that an
individual cannot reach through the defined area and access
the hazard point before the machine has stopped.
Additionally, the hazard cannot be accessible by reaching
around, under, or over the defined area. To accomplish this,
supplemental guarding (mechanical barriers, such as screens
or bars), as described by ANSI B11.19 safety requirements or
other appropriate standards, must be installed. Access will then
be possible only through the defined area of the EZ-SCREEN
Type 2 System or through other safeguarding that prevents
access to the hazard (see Figure 4 on p. 15).
The mechanical barriers used for this purpose are typically
called "hard (fixed) guarding"; there must be no gaps between
the hard (fixed) guarding and the defined area. Any openings in
the hard (fixed) guarding must comply with the safe opening
requirements of ANSI B11.19 or other appropriate standard.
Figure 4. An example of supplemental safeguarding
Hard (fixed) Guarding
Reset Switch
Conveyor
Opening
Area
Guarding
Robot
Turn-
Table
Hard (fixed)
Guarding
Area
Guarding
Safety Light Curtain/Screen
Figure 4 on p. 15 shows an example of supplemental safeguarding inside a robotic work cell. The EZ-SCREEN Type 2, in
conjunction with the hard (fixed) guarding, is the primary safeguard. Supplemental safeguarding (such as a horizontal-
mounted safety light screen as an area guard) is required in areas that cannot be viewed from the reset switch (for example,
behind the robot and the conveyor). Additional supplemental safeguarding may be required to prevent clearance or trapping
hazards (for example, a safety mat as an area guard between the robot, the turntable, and the conveyor).
WARNING:
•The hazard must be accessible only through the sensing field
•Incorrect system installation could result in serious injury or death.
• The installation of the EZ-SCREEN Type 2 must prevent any individual from reaching around,
under, over or through the defined area and into the hazard without being detected.
• See OSHA CFR 1910.217, ANSI B11.19, and/or ISO 14119, ISO 14120 and ISO 13857 for
information on determining safety distances and safe opening sizes for your guarding device.
Mechanical barriers (for example, hard (fixed) guarding) or supplemental safeguarding might be
required to comply with these requirements.
3.1.4 Other Considerations
Reset Switch Location
The reset switch must be mounted at a location that complies with the warning and guidelines below. If any
hazardous areas are not in view from the switch location, additional means of safeguarding must be provided. The switch
should be protected from accidental or unintended actuation (for example, through the use of rings or guards).
A key-actuated reset switch provides some operator or supervisory control, as the key can be removed from the switch and
taken into the guarded area. However, this does not prevent unauthorized or inadvertent resets due to spare keys in the
possession of others, or additional personnel entering the guarded area unnoticed. When considering where to locate the
reset switch, follow the guidelines below.
WARNING:
•Install reset switches properly
•Failure to properly install reset switches could result in serious injury or death.
• Install reset switches so that they are accessible only from outside, and in full view of, the
safeguarded space. Reset switches cannot be accessible from within the safeguarded space.
Protect reset switches against unauthorized or inadvertent operation (for example, through the use
of rings or guards). If there are any hazardous areas that are not visible from the reset switches,
provide additional safeguarding.
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All reset switches must be:
•Outside the guarded area
• Located to allow the switch operator a full, unobstructed, view of the entire guarded area while the reset is performed
• Out of reach from within the guarded area
• Protected against unauthorized or inadvertent operation (such as through the use of rings or guards).
Important: Resetting a safeguard must not initiate hazardous motion. Safe work procedures require a
start-up procedure to be followed and the individual performing the reset to verify that the entire hazardous
area is clear of all personnel before each reset of the safeguard is performed. If any area cannot be
observed from the reset switch location, additional supplemental safeguarding must be used: at a
minimum, visual and audible warnings of machine start-up.
Adjacent Reflective Surfaces
WARNING:
•Do not install the system near reflective surfaces
•Reflective surfaces could reflect the sensing beam(s) around an object or person within the
defined area, preventing detection by the system. Failure to prevent reflection problems results in
incomplete guarding and an optical short circuit that could result in serious injury or death.
• Do not locate the defined area near a reflective surface. Perform the trip test, as described in the
product documentation, to detect such reflection(s).
A reflective surface located adjacent to the defined area may deflect one or more beams around an object in the defined
area. In the worst case, an optical short circuit may occur, allowing an object to pass undetected through the defined area.
This reflective surface may result from shiny surfaces or glossy paint on the machine, the workpiece, the work surface, the
floor, or the walls. Beams deflected by reflective surfaces are discovered by performing the trip test and the periodic checkout
procedures. To eliminate problem reflections:
•If possible, relocate the sensors to move the beams away from the reflective surface(s), being careful to maintain
adequate separation distance
• Otherwise, if possible, paint, mask, or roughen the shiny surface to reduce its reflectivity
• Where these are not possible (as with a shiny workpiece or machine frame), determine the worst-case resolution
resulting from the optical short circuit and use the corresponding depth penetration factor (Dpf or C) in the Safety
Distance (Minimum Distance) formula; or mount the sensors in such a way that the receiver's field of view and/or the
emitter's spread of light are restricted from the reflective surface
• Repeat the trip test (see Trip Test under Initial Checkout Procedure on p. 25) to verify these changes have
eliminated the problem reflection(s). If the workpiece is especially reflective and comes close to the defined area,
perform the trip test with the workpiece in place
Figure 5. Adjacent Reflective Surfaces
d
d
d
Operating Range (R)
Emitter Receiver
Do not position reflective surfaces
within the shaded area
top view
side view
For 0.2 to 3 m (8" to 10') Operating range: d = 0.26 m (10")
For Operating range > 3 m (>10'): d = 0.0875 x R (m or ft)
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Use of Corner Mirrors
EZ-SCREEN Type 2 may be used with one or more corner mirrors. Mirrors are not allowed for applications that would allow
undetected personnel access into the safeguarded area. The use of glass-surface corner mirrors reduces the maximum
specified emitter/receiver separation by approximately 8 percent per mirror, as follows:
Light Screen Maximum Range
Light Screen Series 0 Mirrors 1 Mirror 2 Mirrors 3 Mirrors 4 Mirrors
14 mm EZ-SCREEN® (SLS) 6 m (20 ft) 5.6 m (18.4 ft) 5.2 m (17.0 ft) 4.8 m (15.7 ft) 4.4 m (14.5 ft)
30 mm EZ-SCREEN® (SLS) 18 m (60 ft) 16.8 m (55 ft) 15.5 m (51 ft) 14.3 m (47 ft) 13.1 m (43 ft)
EZ-SCREEN® LP (SLP) 7 m (23 ft) 6.5 m (21.2 ft) 6.0 m (19.5 ft) 5.5 m (18.0 ft) 5.1 m (16.6 ft)
EZ-SCREEN® LP Basic (SLPVA) 4 m (13 ft) 3.7 m (12.1 ft) 3.4 m (11.2 ft) 3.1 ft m (10.3 ft) 2.8 m (9.2 ft)
EZ-SCREEN® LS (SLL) 12 m (39 ft) 11 m (36 ft) 10.1 m (33 ft) 9.3 m (30.5 ft) 8.6 m (28 ft)
EZ-SCREEN® LS Basic (SLLV) 8 m (26.2 ft) 7.4 m (24.3 ft) 6.8 m (22.3 ft) 6.2 m (20.3 ft) 5.7 m (18.7 ft)
EZ-SCREEN® Type 2 (LS2) 15 m (50 ft) 13.8 m (45 ft) 12.7 m (42 ft) 11.7 m (38 ft) 10.8 m (35 ft)
See the specific mirror data sheet or www.bannerengineering.com for more information.
If mirrors are used, the difference between the angle of incidence from the emitter to the mirror and from the mirror to the
receiver must be between 45° and 120° (see Figure 6 on p. 17). If placed at a sharper angle, an object in the light screen
may deflect beam(s) to the receiver, preventing the object from being detected, also know as false proxing. Angles greater
than 120° result in difficult alignment and possible optical short circuits.
WARNING:
•Retroreflective Mode Installation
•Failure to follow these instructions may create unreliable sensing and may result in serious injury
or death.
• Do not install emitters and receivers in retroreflective mode with less than a 45° angle of
incidence. Install emitters and receivers at an appropriate angle.
Figure 6. Using EZ-SCREEN Type 2 sensors in a retroreflective mode
A
Emitter
Receiver
Mirror
45˚ < A < 120˚
Emitter
Receiver
Mirror
Emitter and Receiver Orientation
The emitter and receiver must be mounted parallel to each other and aligned in a common plane, with both machine interface
cable ends pointing in the same direction. Never mount the emitter with its machine interface cable end oriented in the
opposite direction of the cable end of the receiver. If this occurs, voids in the light screen may allow objects or personnel to
pass through the defined area undetected.
The emitter and receiver may be oriented in a vertical or horizontal plane, or at any angle between horizontal and vertical, as
long as they are parallel to each other and their cable ends point in the same direction. Verify that the light screen completely
covers all access to the hazard point that is not already protected by hard (fixed) guarding or other supplemental guarding.
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WARNING:
•Properly install system components
•Incorrectly orienting the system components impairs the performance of the system and results in
incomplete guarding, which can result in serious injury or death.
• Install the system components with their corresponding cable ends pointing in the same direction.
Figure 7. Examples of Correct Emitter/Receiver Orientation
Receiver
Emitter
Receiver
Emitter
Receiver
Emitter
Both cable ends down Both cable ends up Orientation parallel to floor with both
cable ends pointing in the same
direction
Figure 8. Examples of Incorrect Emitter/Receiver Orientation
Receiver
Emitter
Receiver
Emitter
Cable ends point in opposite directions
Problem: Voids in defined area
Emitter and receiver not parallel to each other
Problem: Reduced excess gain
Installation of Multiple Systems
Whenever two or more EZ-SCREEN Type 2 emitter and receiver pairs are adjacent to one another, optical crosstalk may
take place between the systems. To minimize optical crosstalk, alternate the positions of the emitters and receivers (see
Figure 9 on p. 19).
When three or more systems are installed in the same plane (as shown in Figure 9 on p. 19), optical crosstalk may occur
between sensor pairs whose emitter and receiver lenses are oriented in the same direction. In this situation, eliminate optical
crosstalk by mounting these sensor pairs exactly in line with each other within one plane, or by adding a mechanical barrier
between the pairs.
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Figure 9. Installation of Multiple Systems
Receiver
Emitter
Scan Code 2
Receiver
Emitter
Scan Code 1
a. Two systems in a horizontal plane
Receiver
Emitter
Scan Code 2
Receiver
Emitter
Scan Code 1
b. Two or three systems stacked (or alternate receiver/
emitter positions)
Emitter
Receiver
Horizontal
Receiver Horizontal
Emitter
Scan Code 1
Scan Code 2
c. Two systems at right angles
Receiver 1
Emitter 1
Scan Code 1
Receiver 2
Emitter 2
Scan Code 2
Receiver 3
Emitter 3
Scan Code 2
Opaque Shield
d. Multiple systems
WARNING:
•Properly connect multiple pairs of sensors
•Connecting multiple output signal switching devices (OSSD) safety outputs to one interface
module or otherwise parallel OSSD outputs can result in serious bodily injury or death, and is
prohibited.
• Do not connect multiple pairs of sensors to a single device.
WARNING:
•Adjacent components can synchronize incorrectly
•The light curtain's safety function is reduced when components are not synchronized correctly,
creating an unsafe condition that could result in serious injury or death.
• When multiple systems are mounted closely together, or where a secondary emitter is in view
(within ±5°) and within range of an adjacent receiver, a receiver can synchronize to the signal from
the wrong emitter, reducing the safety function of the light curtain.
3.2 Mounting System Components
3.2.1 Overview of Emitter/Receiver Mounting Hardware
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Mounting Hardware
The EZ-SCREEN standard end-cap mounting bracket
hardware is supplied with each emitter and receiver.
Brackets are designed to mount directly to MSA Series
stands using the hardware with the supplied stands.
Figure 10. Emitter and Receiver End-Cap Mounting Brackets
Using Center Mounting Brackets
Center mounting brackets are supplied with longer sensors
and must be used whenever the sensors are subject to
shock or vibration. The sensors are designed to be mounted
with up to 450 mm (18 in) distance between brackets:
•Sensors 600 to 900 mm (24 in to 36 in) long are
supplied with one center bracket, which should be
centered on the sensor.
• Sensors 1050 to 1350 mm (42 in to 54 in) long are
supplied with two center brackets, which should be
positioned 1/3 of the sensor's length from each
sensor end.
• Sensors 1500 to 1800 mm (59 in to 71 in) long are
supplied with three center brackets
To install each bracket:
1. Spread the clamp and snap over the back of the
sensor so that the clamp is securely fastened to the
sensor without blocking any beams.
2. Compress the foam spacer and slide the clamp along
the length of the sensor housing to align the clamp
with the center mounting bracket as shown in Figure
11 on p. 20. Three separate mounting holes are
provided on the clamp to allow for all possible
mounting configurations.
3. Connect the clamp to the center bracket using the
M3 screw supplied.
4. Loosen all the mounting screws to the sensor, align
the sensors and then tighten the end screws. Finally,
tighten the M3 screw joining the clamp to the center
mounting bracket.
Figure 11. Emitter and Receiver Center Mounting Brackets
3.2.2 Mounting and Initial Alignment of Emitter/Receiver Pairs
Emitter/receiver pairs may be spaced from 0.2 to 15 m (8 in to 50 ft) apart. The maximum distance between an emitter and
its receiver is reduced if corner mirrors are used. The supplied brackets (when mounted to the sensor end caps) allow ±30°
rotation.
To mount each emitter/receiver pair:
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