Sunx SF4B User manual

SUNX Limited MJE-SF4B No.0012-72V
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SUNX Limited MJE-SF4B No.0012-72V
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(MEMO)

SUNX Limited MJE-SF4B No.0012-72V
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Thank you for purchasing SUNX’s Light Curtain,
SF4B
series (hereinafter called ‘this de-
vice’).
Please read this instruction manual carefully and thoroughly for the correct and optimum use
of this product.
Kindly keep this manual in a convenient place for quick reference.
This device is a light curtain for protecting a person from dangerous parts of a machine which
can cause injury or accident.
This manual has been written for the following personnel who have undergone suitable
training and have knowledge of light curtains, as well as, safety systems and standards.
who are responsible for the introduction of this device
who design the system using this device
who install and connect this device
who manage and operate a plant using this device
1) All the contents of this instruction manual are the copyright of the publishers, and may
not be reproduced (even extracts) in any form by any electronic or mechanical means
(including photocopying, recording, or information storage and retrieval) without per-
mission in writing from the publisher.
2) The contents of this instruction manual may be changed without prior notice for further
improvement of the device.
3) Though we have carefully drawn up the contents of this instruction manual, if there are
any aspects that are not clear, or any error that you may notice, please contact our
local SUNX office of the nearest distributor.
4) English and Japanese versions of this instruction manual are original.
Notes

SUNX Limited MJE-SF4B No.0012-72V
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Contents
Chapter 1 Introduction·······················································6
1-1 Attention Marks ········································································6
1-2 Safety Precautions···································································6
1-3 Applicable Standards / Regulations··········································9
1-4 Confirmation of Packed Contents···········································10
Chapter 2 Before Using This Device······························· 11
2-1 Features·················································································11
2-2 Part Description ·····································································11
2-3 Protection Area ······································································14
2-3-1 Sensing Area·············································································14
2-3-2 Safety Distance ·········································································15
2-3-3 Influence of Reflective Surfaces ···············································20
2-3-4 Sensor Placement·····································································21
2-4 Mounting ················································································22
2-4-1 Mounting of the Mounting Bracket ············································22
2-4-2 Mounting of the Bottom Cap Cable (optional) ··························28
2-4-3 Extension and Dismantling of Sensor (Series Connection)······29
2-5 Wiring·····················································································31
2-5-1 Power Supply Unit·····································································31
2-5-2 I/O Circuit Diagrams and Output Waveform ·····························32
2-5-3 Wiring · Connecting Procedure and
Connector Pin Arrangement······················································34
2-5-4 Basic Wiring ··············································································36
2-5-5 Wiring for Manual Reset (Interlock is Valid)······························38
2-5-6 Series Connection·····································································40
2-5-7 Parallel Connection···································································42
2-5-8 Series and Parallel Mixed Connection······································45
2-5-9 Wiring for Auto-reset (Interlock is Invalid)·································48
2-5-10 Wiring Configuration for Invalid External Device
Monitor Function ·······································································50
2-5-11 Connection Configuration for Valid Muting Function ················52
2-6 Adjustment·············································································54
2-6-1 Beam-axis Alignment ································································54
2-6-2 Operation Test···········································································56
2-6-3 Operation···················································································57
Chapter 3 Functions························································· 64
3-1 Self-diagnosis Function··························································64
3-2 Interlock Function···································································64
3-3 Emission Halt Function ··························································65
3-4 Interference Prevention Function ···········································65
3-5 Auxiliary Output (Non-safety Output) ·····································66
3-6 External Device Monitor Function ··········································66
3-7 Muting Function ·····································································68
3-8 Override Function ··································································71
3-9 Functions Using Handy Controller (
SFB-HC
) (Optional)········72

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Chapter 4 Maintenance···················································· 74
4-1 Daily Inspection ····································································· 74
4-2 Periodic Inspection (Every Six Months)································· 75
4-3 Inspection after Maintenance ················································ 75
Chapter 5 Troubleshooting ············································· 76
5-1 Troubleshooting of Emitter····················································· 76
5-2 Troubleshooting of Receiver·················································· 78
Chapter 6 Specifications · Dimensions ·························· 80
6-1 Specifications ········································································ 80
6-2 Options·················································································· 85
6-3 Dimensions············································································ 90
6-3-1 Rear Mounting with Standard Mounting Bracket (
MS-SFB-1
)· 90
6-3-2 Side Mounting with Standard Mounting Bracket (
MS-SFB-1
)·91
6-3-3 Rear Mounting with Dead Zoneless Mounting
Bracket (
MS-SFB-3
)································································· 92
6-3-4 Side Mounting with Dead Zoneless Mounting
Bracket (
MS-SFB-3
)································································· 93
6-3-5 Mounting Brackets···································································· 94
Chapter 7 Others······························································ 97
7-1 Glossary ················································································ 97
7-2 CE Marking Declaration of Conformity ·································· 99

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Chapter 1 Introduction
1-1
Attention Marks
This instruction manual employs the following attentions marks ,de-
pending on the degree of the danger to call operator’s attention to each particular action.
Read the following explanation of these marks thoroughly and observe these notices without
fail.
If you ignore the advice with this mark, death or serious injury could result.
If you ignore the advice with this mark, injury or material damage could
result.
<Reference>
It gives useful information for better use of this device.
1-2
Safety Precautions
Use this device as per its specifications. Do not modify this device since its functions and
capabilities may not be maintained and it may malfunction.
This device has been developed / produced for industrial use only.
This device is suitable for indoor use only.
Use of this device under the following conditions or environment is not presupposed.
Please consult us if there is no other choice but to use this device in such an environ-
ment.
1) Operating this device under conditions and environment not described in this manual.
2) Using this device in the following fields: nuclear power control, railroad, aircraft,
automobiles, combustion facilities, medical systems, aerospace development, etc.
When this device is to be used for enforcing protection of a person from any danger oc-
curring around an operating machine, the user should satisfy the regulations established
by national or regional security committees (Occupational Safety and Health Administra-
tion: OSHA, the European Standardization Committee, etc.). Contact the relative organi-
zation(s) for details.
In case of applying this device to particular equipment, follow the safety regulations in
regard to appropriate usage, mounting (installation), operation and maintenance. The
users including the installation operator are responsible for the introduction of this device.
Use this device by installing suitable protection equipment as a countermeasure for fail-
ure, damage, or malfunction of this device.
Before using this device, check whether the device performs properly with the functions
and capabilities as per the design specifications.
In case of disposal, dispose this device as industrial waste.
Machine designer, installer, employer and operator
The machine designer, installer, employer and operator are solely responsible to en-
sure that all applicable legal requirements relating to the installation and the use in any
application are satisfied and all instructions for installation and maintenance contained
in the instruction manual are followed.
Whether this device functions as intended to and systems including this device comply
with safety regulations depends on the appropriateness of the application, installation,
maintenance and operation. The machine designer, installer, employer and operator
are solely responsible for these items.
Engineer
The engineer would be a person who is appropriately educated, has widespread
knowledge and experience, and can solve various problems which may arise during
work, such as a machine designer, or a person in charge of installation or operation etc.

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Operator
The operator should read this instruction manual thoroughly, understand its contents,
and perform operations following the procedures described in this manual for the cor-
rect operation of this device.
In case this device does not perform properly, the operator should report this to the
person in charge and stop the machine operation immediately. The machine must not
be operated until correct performance of this device has been confirmed.
Environment
Do not use a mobile phone or a radio phone near this device.
If there exists a reflective surface in the place where this device is to be installed, make
sure to install this device so that reflected light from the reflective surface does not
enter into the receiver, or take countermeasures such as painting, masking, roughen-
ing, or changing the material of the reflective surface, etc. Failure to do so may cause
the sensor not to detect, resulting in death or serious injury.
Do not install this device in the following environments.
1) Areas exposed to intense interference (extraneous) light such as high-frequency
fluorescent lamp (inverter type), rapid starter fluorescent lamp, stroboscopic lights
or direct sunlight.
2) Areas with high humidity where condensation is likely to occur
3) Areas exposed to corrosive or explosive gases
4) Areas exposed to vibration or shock of levels higher than that specified
5) Areas exposed to contact with water
6) Areas exposed to too much steam or dust
Installation
Always keep the correctly calculated safety distance between this device and the
dangerous parts of the machine.
Install extra protection structure around the machine so that the operator must pass
through the sensing area of this device to reach the dangerous parts of the machine.
Install this device such that some part of the operator’s body always remains in the
sensing area when operator is done with the dangerous parts of the machine.
Do not install this device at a location where it can be affected by wall reflection.
When installing multiple sets of this device, connect the sets and, if necessary, install
some barriers such that mutual interference does not occur.
Do not use this device in a reflective configuration.
The corresponding emitter and receiver must have the same serial No. and be cor-
rectly oriented.
Equipment in which this device is installed
When this device is used in the ‘PSDI Mode’, an appropriate control circuit must be
configured between this device and the machinery. For details, be sure to refer to the
standards or regulations applicable in each region or country.
In Japan, do not use this device as safety equipment for a press machine.
Do not install this device with a machine whose operation cannot be stopped immedi-
ately in the middle of an operation cycle by an emergency stop equipment.
This device starts the performance after 2 seconds from the power ON. Have the
control system started to function with this timing.

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Wiring
Be sure to carry out the wiring in the power supply off condition.
All electrical wiring should conform to the regional electrical regulations and laws.
The wiring should be done by engineer(s) having the special electrical knowledge.
Do not run the sensor cable together with high-voltage lines or power lines or put them
together in the same raceway.
In case of extending the cable of the emitter or the receiver, each can be extended up
to 50m by using the exclusive cable. Furthermore, if the cable is extended in the state
that the sensor is in series connection, or the muting lamp is used, the total extendable
length of the cable depends on the number of the sensors in series connection.
For details, refer to ‘
2-5-3 Wiring · Connecting Procedure and Connector Pin Ar-
rangement
’.
When this device is used as a Korean S-mark conforming product, the power line ca-
ble connected to this device should be within 10m.
Do not control the device only at one control output (OSSD 1, OSSD 2).
In order that the output is not turned to ON due to earth fault of control output (OSSD 1,
OSSD 2), be sure to ground to 0V side (PNP output) / +24V side (NPN output).
When this device is used in line with conformity with the Korean S-mark, be sure to
ground to 0V (PNP output).
When using this device in Korea with S-mark, be sure to ground to 0V side (PNP
output).
Maintenance
When replacement parts are required, always use only genuine supplied replacement
parts. If substitute parts from another manufacturer are used, the sensor may not come
to detect, result in death or serious body injury.
The periodical inspection of this device must be performed by an engineer having the
special knowledge.
After maintenance or adjustment, and before starting operation, test this device fol-
lowing the procedure specified in ‘
Chapter 4 Maintenance
’.
Clean this device with a clean cloth. Do not use any volatile chemicals.
Others
Never modify this device. Modification may cause the sensor not to detect, resulting in
death or serious body injury.
Do not use this device to detect objects flying over the sensing area.
Do not use this device to detect transparent objects, translucent objects or objects
smaller than the specified minimum sensing objects.

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1-3
Applicable Standards / Regulations
This device complies with the following standards / regulations.
<EU Directives>
EU Machinery Directive 98/37/EC (Valid until December 28, 2009)
EU Machinery Directive 2006/42/EC (Valid from December 29, 2009)
EMC Directive 2004/108/EC
<European Standards>
EN 61496-1 (Type 4), EN 55011, EN 61000-6-2, EN 50178
EN ISO 13849-1: 2008 (Category 4, PLe)
<International Standards>
IEC 61496-1/2 (Type 4), ISO 13849-1: 2006 (Category 4, PLe), IEC 61508-1~7 (SIL3)
<Japanese Industrial Standards (JIS)>
JIS B 9704-1/2 (Type 4), JIS B 9705-1 (Category 4), JIS C 0508 (SIL3)
<Standards in U.S. / Canada)>
ANSI/UL 61496-1/2 (Type 4), ANSI/UL 508, UL 1998 (Class 2)
CAN/CSA C22.2 No.14, CAN/CSA C22.2 No.0.8
<Regulations in U.S.>
OSHA 1910.212, OSHA 1910.217(C), ANSI B11.1 to B11.19, ANSI/RIA 15.06
Regarding EU Machinery Directive, a Notified Body, TUV SUD, has certified with the type
examination certificate.
With regard to the standards in US / Canada, a NRTL, UL (Underwriters Laboratories Inc.)
has certified for C-UL US Listing Mark.
<Regulations in Korea>
S1-G-35-2005, S2-W-11-2003
The S-mark certificate has been certified by Korea Occupational Safety & Health Agency
(KOSHA).
<Reference>
The conformity to JIS, OSHA and ANSI for this device has been evaluated by ourselves.
The C-CL US Listing Mark indicates compliance with both Canadian and U.S. requirements.
This device conforms to the EMC directive and the Machinery directive. The mark on the sensor main
body indicates that this product conforms to the EMC directive.
The mark on the sensor main body indicates that this device has a certificate of the s-mark.
In Japan, never use this device as a safety equipment for any press machine or shearing
machine.
When this device is used in a place other than the places shown above, be sure to confirm
the standards or regulations applicable in each region or country before use.

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1-4
Confirmation of Packed Contents
Sensor: Emitter, Receiver each 1pc.
Test Rod 1 pc.
For
SF4B-F
:
SF4B-TR14
(ø 14 x 220mm), For
SF4B-H
:
SF4B-TR25
(
Ǿ
25 x 220mm)
Intermediate Supporting Bracket (
MS-SFB-2
) 0 to 3 sets
Note: The intermediate support bracket (
MS-SFB-2
) is enclosed with the following products. The quantity dif-
fers depending on the product as shown below:
1 set :
SF4B-F
… Sensor with 79 to 111 beam channels
SF4B-H
… Sensor with 40 to 56 beam channels
SF4B-A
… Sensor with 20 to 28 beam channels
2 sets:
SF4B-F127
,
SF4B-H
… Sensor with 64 to 80 beam channels
SF4B-A
… Sensor with 32 to 40 beam channels
3 sets:
SF4B-H
… Sensor with 88 to 96 beam channels
SF4B-A
… Sensor with 44 to 48 beam channels
Instruction Manual (this manual) 1 pc.

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Chapter 2 Before Using This Device
2-1
Features
This device is the light curtain with the following features.
No special controller is required.
The control output (OSSD 1, OSSD 2) is PNP / NPN output switching type.
Beam-axis alignment indicators which make beam-axis alignment easy are incorporated.
Each function setting is available by using the handy controller (
SFB-HC
) (optional)
Refer to ‘
3-9 Functions Using Handy Controller (SFB-HC) (Optional)
’ for details.
Refer to ‘
6-2 Options
’ for details of options.
2-2
Part Description

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<Emitter>
It emits light to the receiver facing it. Furthermore, the status of the emitter and the receiver is
indicated on its display section.
<Receiver>
It receives light from the emitter facing it. Simultaneously, it turns ON the control output
(OSSD 1, OSSD 2) when the all beam channels receive light from emitter, and it turns OFF
the control output (OSSD 1, OSSD 2) when one or more beam channels are blocked light.
Besides, the receiver displays its status on the display section.
Notes: 1) In case of using the muting function, the following items, 12-core bottom cap cable (
SFB-CB05-MU
,
SFB-CCB -MU
) (optional), muting sensor and muting lamp are required. Please purchase 12-core
bottom cap cable, muting sensor, and muting lamp separately.
2) The blanking function is set by using the handy controller (
SFB-HC
) (optional). Please purchase the
handy controller separately.
<Beam channel>
The light emitting elements of the emitter and the light receiving elements of the receiver are
placed at the following intervals, 10mm (
SF4B-F
), 20mm (
SF4B-H
), and 40mm
(
SF4B-A
).
<Standard mounting bracket (optional)>
This bracket is to be used for mounting the emitter / receiver. It enables to adjust the hori-
zontal mounting angle using the standard mounting bracket.
<M8 mounting bracket (optional)>
This allows the light curtain to be mounted at the rear side with one M8 hexagon-socket-head
bolt. Horizontal angle can be adjusted.
<Pitch adapter bracket (optional)>
This is used as the mounting bracket when changing over a previous light curtain with a
protective height of 200 to 750mm to this device. It is installed using two M5 hexa-
gon-socket-head bolts. Horizontal angle can be adjusted.
<M8 pitch adapter bracket (optional)>
This is used as the mounting bracket when changing over a previous light curtain with a
protective height of 200 to 750mm to this device. It is installed using two M8 hexa-
gon-socket-head bolts. Horizontal angle can be adjusted.
<Dead zoneless mounting bracket (optional)>
This dead zoneless bracket is used for mounting both emitter and receiver. This bracket is
useful for mounting the sensor to the limited mounting space.
<Intermediate supporting bracket (optional)>
This bracket is to be used for mounting the sensor having 79 beam channels or more for
SF4B-F ,
40 beam channels or more for
SF4B-H
, 20 beam channels or more for
SF4B-A
.

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<Display section>
Notes: 1) Since the color of the operation indicator changes according to ON / OFF status of the control output (OSSD
1, OSSD 2), the operation indicator is marked as ‘OSSD’ on the sensor.
2) The threshold where the control output (OSSD 1, OSSD 2) changes from OFF to ON is applied as ‘100%
incident beam intensity’.
3) The status ‘when light is blocked’ refers to the status that the some obstacle is existed in the sensing area.
4) The blanking function is set by using the handy controller (
SFB-HC
) (optional). Please purchase the handy
controller separately.
5) The description given in [ ] is marked on the sensor.

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2-3
Protection Area
2-3-1 Sensing Area
The sensing area is the zone formed by the sensing height of the sensor and the sensing
range between the emitter and the receiver. The sensing height is determined by the number
of beam channels. Furthermore, the sensing range can be 0.3 to 9m for
SF4B-H
(12 to 64
beam channels) and
SF4B-A
(6 to 32 beam channels), 0.3 to 7m for
SF4B-F
and
SF4B-H
(72 to 96 beam channels) and
SF4B-A
(36 to 48 beam channels). Take care that
the sensing range becomes short after mounting either protection cover (
FC-SFBH-
) (op-
tional). Take care that if the sensing range is less than 0.3m, malfunction may occur due to
the optical structure.
<Example of Correct Installation>
<Example of Incorrect Installation>
Be sure to install protection structure around the machine so that the operator must pass
through the sensing area of this device to reach the dangerous parts of the machine.
Furthermore, ensure that some part of the operator’s body always remains in the sensing
area when operation is done with the dangerous parts of the machine. Failure to do so can
result in serious injury or death.
Do not use any reflection type or recursive reflection type arrangement.
Furthermore, facing several receivers towards one emitter, or vice versa, could produce a
non-sensing area or cause mutual interference, which may result in serious injury or death.

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2-3-2 Safety Distance
The safety distance is the minimum distance that must be maintained between the light cur-
tain and the dangerous parts of the machine so that the machine can be stopped before a
human body or an object can reach the dangerous parts.
The safety distance is calculated based on the equation described in the next page when a
person moves perpendicular (normal intrusion) to the sensing area of the area sensor.
Calculate the safety distance correctly, and always maintain the distance which is equal to o
r
greater than the safety distance, between the sensing area of this device and the dangerous
parts of the machine. If the safety distance is miscalculated or if sufficient distance is no
t
maintained, the machine will not stop quickly before reaching to the dangerous parts, which
can result in serious injury or death.
Before designing the system, refer to the relevant standards of the region where this device is
to be used, and then install this device.
Furthermore, the equation described in the next pages is to be used only in case the intrusion
direction is perpendicular to the sensing area. In case the intrusion direction is not perpen-
dicular to the sensing area, be sure to refer to the relevant standard (regional standard,
specification of the machine, etc.) for details of the calculation.
The max. response time of the machine is from the point that the machine receives the hal
t
signal from this device to the point that the dangerous part of the machine stops. The max.
response time of the machine should be timed with the machine to be actually used.
The size of the minimum sensing object for this device varies depending on the case whether
the floating blanking function is applied or not. Calculate the safety distance with the proper
size of the minimum sensing object and appropriate equation.
<Size of minimum sensing object when applying floating blanking function>
Floating blanking function
Setting (Note)
Invalid 1 beam
channel
2 beam
channels
3 beam
channels
SF4B-F
غ
(10mm beam channel pitch type)
Ǿ
14mm
Ǿ
24mm
Ǿ
34mm
Ǿ
44mm
SF4B-H
غ
(20mm beam channel pitch type)
Ǿ
25mm
Ǿ
45mm
Ǿ
65mm
Ǿ
85mm
SF4B-A
غ
(40mm beam channel pitch type)
Ǿ
45mm
Ǿ
85mm
Ǿ
125mm
Ǿ
165mm
Note: Refer to ‘
3-9 Functions Using Handy Controller (SFB-HC) (Optional)
’ for details of
the floating blanking function.

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[For use in Europe (EU) (as EN 999)] (Also applicable to ISO 13855)
(For intrusion direction perpendicular to the sensing area)
<In case that the minimum sensing object is ø40mm or less>
Equation 1 S = K x T + C
S: Safety distance (mm)
Minimum required distance between the sensing area surface and the dangerous parts
of the machine
K: Intrusion velocity of operator’s body or object (mm/s)
Taken as 2,000 (mm/s) for calculation
T: Response time of total equipment (s)
T = T
m
+ T
SF4B
T
m
: Maximum halting time of device (s)
T
SF4B
: Response time of this device (s)
C: Additional distance calculated from the size of the minimum sensing object of the
sensor (mm)
However, the value of C cannot be 0 or less.
C = 8 x (d - 14)
d: Minimum sensing object diameter (mm)
<Reference>
For calculating the safety distance S, there are the following five cases.
First calculate by substituting the value K = 2,000 (mm/s) in the equation above. Then, classify the obtained
value of S into three cases, 1) S < 100, 2) 100 S 500, and 3) S > 500.
For Case 3) S > 500, recalculate by substituting the value K = 1,600 (mm/s). After that, classify the calculation
result into two cases, 4) S 500 and 5) S > 500. For details, refer to ‘Calculation Example 1 For use in
Europe’.
For calculating T
m
(maximum halt time of the device), use a special device called a ‘brake monitor’.
When this device is used in the ‘PSDI Mode’, an appropriate safety distance S must be calculated.
For details, be sure to refer to the standards or regulations applicable in each region or country.
<In the case the minimum sensing object is ø40mm or less>
Equation S = K x T + C
S: Safety distance (mm)
K: Intrusion velocity of operator’s body or object (mm/s)
Taken as 1,600 (mm/s) for calculation
T: Response time of total equipment (s)
T = T
m
+ T
SF4B
T
m
: Maximum halting time of device (s)
T
SF4B
: Response time of this device (s)
C: Additional distance calculated from the size of the minimum sensing object of the
sensor (mm)
C = 850 (mm)

SUNX Limited MJE-SF4B No.0012-72V
- 17 -
<Calculation Example>
Calculation Example 1 For use in Europe
(OFF response time: 14ms or less, minimum sensing object diameter: 14mm)
First, calculate with K = 2,000.
S = K x T + C
= K x (T
m
+ T
SF4B
) + 8 x (d - 14)
= 2,000 x (T
m
+ 0.014) + 8 x (14 - 14)
= 2,000 x T
m
+ 2,000 x 0.014
= 2,000 x T
m
+ 28
If the result is:
1) In case S < 100 (mm)
Safety distance S is taken as 100 (mm)
2) In case 100 S500 (mm)
Safety distance S is taken as 2,000 x T
m
+ 28 (mm)
3) In case S > 500 (mm)
S = K’ x (T
m
+ T
SF4B
) + 8 x (d - 14)
= 1,600 x (T
m
+ 0.014) + 8 x (14 - 14)
= 1,600 x T
m
+ 1,600 x 0.014
= 1,600 x T
m
+ 22.4
then, calculate again.
If the result is:
4) In case S 500 (mm)
Safety distance S is taken as 500 (mm)
5) In case S > 500 (mm)
Safety distance S is taken as 1,600 x T
m
+ 22.4 (mm)
In case this device is installed in a system with a maximum halting time of 0.1 (s)
S = 2,000 x T
m
+ 28
= 2,000 x 0.1 + 28
= 228
Since this value matches with Case 2) above, S is 228 (mm).
In case this device is installed in a system with a maximum halting time of 0.4 (s)
S = 2,000 x T
m
+ 28
= 2,000 x 0.4 + 28
= 828
Since this value matches with Case 3) above,
S = 1,600 x T
m
+ 22.4
= 1,600 x 0.4 + 22.4
= 662.4
Since this value matches with Case 5) above, S is 662.4 (mm).

SUNX Limited MJE-SF4B No.0012-72V
- 18 -
[For use in the United States of America (as per ANSI B11.19)]
Equation 2 S = K x (T
s
+ T
c
+ T
SF4B
+ T
bm
) + Dpf
S : Safety distance (mm)
Minimum required distance between the sensing area surface and the dangerous parts of the
machine
K : Intrusion speed {Recommended value in OSHA is 63 (inch/s) [ 1,600 (mm/s)] }
ANSI B11.19 does not define the intrusion speed ‘K’. When determining K, consider possible
factors including physical ability of operators.
T
s
: Halting time calculated from the operation time of the control element (air valve,
etc.) (s)
T
c
: Maximum response time of the control circuit required for functioning the brake (s)
T
SF4B
: Response time of this device (s)
T
bm
: Additional halting time tolerance for the brake monitor (s)
The following equation holds when the machine is equipped with a brake monitor.
T
bm
= T
a
- (T
s
+ T
c
)
T
a
: Setting time of brake monitor (s)
When the machine is not equipped with a brake monitor, it is recommended that 20% or more of
(T
s
+ T
c
) is taken as additional halting time.
Dpf : Additional distance calculated from the size of the minimum sensing of the sen-
sor (mm)
SF4B-F
Dpf = 23.8mm
SF4B-H
Dpf = 61.2mm
SF4B-A
Dpf = 129.2mm
Dpf = 3.4 x (d - 0.276) (inch)
3.4 x (d - 7) (mm)
d: Minimum sensing object diameter 0.552 (inch) 14 (mm)
SF4B-F
Minimum sensing object diameter 0.985 (inch) 25 (mm)
SF4B-H
Minimum sensing object diameter 1.772 (inch) 45 (mm)
SF4B-A
Note that the value of Dpf cannot be 0 or less.
<Reference>
When the floating blanking function is applied, the minimum sensing object becomes large. According to ANSI
B11.1, Dpf = 900mm (3ft) when d > 64mm (2.5 inches).
<Reference>
Since the calculation above is performed by taking 1 (inch) = 25.4 (mm), there is a slight difference between the
representation in (mm) and that in (inch). Refer to the relevant standard for the details.

SUNX Limited MJE-SF4B No.0012-72V
- 19 -
<Calculation Example>
Calculation Example 2 For use in the United States of America
[OFF response time: 14ms or less, minimum sensing object diameter: 0.552 inch 14 (mm)]
S = K x (T
s
+ T
c
+ T
SF4B01
+ T
bm
) + Dpf
= 63 x (T
a
+ 0.014) + 3.4 x (d - 0.276) (inch)
= 63 x (T
a
+ 0.014) + 3.4 x (0.552 - 0.276)
= 63 x T
a
+ 63 x 0.014 + 3.4 x 0.276
= 63 x T
a
+ 1.8204
63 x T
a
+ 1.82 (inch)
In case this device is installed in a system with a maximum halting time 0.1 (s)
S = 63 x T
a
+ 1.82
= 63 x 0.1 + 1.82
= 8.12 (inch)
206.248 (mm)
Hence, as per the calculations S is 206.2 (mm).
<Reference>
Since the calculation above is performed by taking 1 (inch) = 25.4 (mm), there is a slight difference between the
representation in (mm) and that in (inch). Refer to the relevant standard for the details.

SUNX Limited MJE-SF4B No.0012-72V
- 20 -
2-3-3 Influence of Reflective Surfaces
Install this device at a distance of at least A (m) (given below) away from reflective surfaces
such as metal walls, floors, ceilings, workpieces, covers, panels or glass surfaces.
<Side View> <Top View>
Distance between emitter and receiver
(Sensing range L) Allowable installation distance A
0.3 to 3m 0.16m
3 to 9m (Note 1) L x tan = L x 0.052 (m) ( = 3°)
Notes: 1) The sensing range L is applicable to
SF4B-H
(12 to 64 beam channels) and
SF4B-A
(6 to 32
beam channels). For
SF4B-F
and
SF4B-H
(72 to 96 beam channels) and
SF4B-A
(36 to 48 beam
channels), the distance between emitter and receiver is 3 to 7m.
2) The effective aperture angle for this device is ±2.5° (when L > 3m) as required by IEC 61496-2 / UL
61496-2. However, install this device away from reflective surfaces considering an effective aperture
angle of ±3° to take care of beam misalignment, etc. during installation.
Allowable Distance from Sensor Beam Channel to Reflective Surface
If there exists a reflective surface in the place where this device is to be installed, make sure
to install this device so that reflected light from the reflective surface does not enter into the
receiver, or take countermeasures such as painting, masking, roughening, or changing the
material of the reflective surface, etc. Failure to do so may cause the sensor not to detect,
resultin
g
in death or serious in
j
ur
y
.
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