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8/11/2019 3RG7841 Standard Cat. 2 Light Curtain
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SIGUARD Light Curtain 3RG7841
Instruction M anual
Order No.: 3ZX1012-0RG78-1EB1
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GWA 4NEB 839 6009-12 604020
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WARNING
SIGUARD photo-electric safety systems are intended to protect operatorsworking at or near dangerous machinery. They can only perform thisfunction if they are correctly fitted to a suitable machine. It is essential thatthe full contents of this manual and all the authoritative documents referredto herein are fully understood before any attempt at installation is made. If indoubt contact your authorized SIEMENS distributor.
IMPORTANT
This manual must accompany the product throughout its working life. Thosepersons responsible for the product must ensure that all persons involved inthe installation, commissioning, operation, maintenance and servicing of theproduct have access to all the information supplied by the manufacturers ofthe machine and its safety system.
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Notes on connecting and operating instructions
These instructions contain information on the efficiency in the use of SIGUARD light
curtains 3RG7841 in accordance with their intended applications. These instructionsconstitute a part of the scope of delivery.
Warning and safety notes are indicated by the symbol
The Siemens AG is not liable for damage resulting from improper use.Acquaintance with these instructions constitutes part of the knowledge
required for proper use.
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TABLE OF CONTENTS
1 System Overview and Range of Applications ......................................33
1.1 System overview ..........................................................................33
1.2 Approvals .....................................................................................33
1.3 Device types and range of applications .......................................34
2 Safety Precautions ..................................................................................35
2.1 General hazards caused by non-observance of safetyprecautions ..................................................................................35
2.2 Special safety instructions for use of Type 2 protective devices ..35
2.3 Operating conditions ....................................................................36
3 Design and Function ...............................................................................37
3.1 System overview ..........................................................................37
3.2 Operating mode ...........................................................................37
3.3 Cascading ....................................................................................37
3.4 Display elements .........................................................................39
3.5 Separate transmission channels to prevent mutual
interference ..................................................................................393.6 Test input .....................................................................................40
3.7 OSSD switch output .....................................................................40
3.8 Contamination and fault signal output .........................................40
3.9 Diagnostic function ......................................................................40
4 Installation ................................................................................................42
4.1 General installation procedures ...................................................42
4.1.1 Distance from reflective surfaces .................................................42
4.1.2 Preventing mutual interference between adjacent devices ..........43
4.2 Mounting procedures for SIGUARD light curtains(resolution 30 mm) .......................................................................44
4.3 Mounting procedures for SIGUARD light curtains usedfor the horizontal safeguarding of danger areas(resolution 55 and 80 mm) ...........................................................45
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4.4 Mechanical installation ................................................................ 46
4.4.1 Standard mounting ...................................................................... 46
4.4.2 Mounting using the protective mounting profile ........................... 47
5 Electrical installation .............................................................................. 48
5.1 Installation procedures ................................................................ 48
5.2 Power supply ............................................................................... 48
5.3 Connecting cables ....................................................................... 48
5.4 Connecting examples .................................................................. 49
5.4.1 Connection with a SIGUARD evaluation unit 3RG7847-4BD ...... 49
5.4.2 Connection with a SIGUARD test monitoring unit
3RG7847-4BF (with integrated muting function) ......................... 50
6 Device Start-up ........................................................................................ 51
7 Cleaning ................................................................................................... 51
8 Technical Dates and Dimensional Drawing .......................................... 52
9 Selection and Ordering information ...................................................... 56
9.1 Selecting a SIGUARD light curtain 3RG7841 ............................. 569.2 Ordering information ................................................................... 56
9.3 Scope of delivery and accessories ............................................. 58
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1 System Overview and Range of Applications
1.1 System overview
SIGUARD is a product group consisting of testable light curtains. Incombination with a test monitoring unit such as the SIGUARD evaluation unit3RG7847 devices qualify as an active optoelectronic protective device (AOPD),Type 2, in accordance with IEC 61496-1, -2 or EN 61496-1, -2. SIGUARD lightcurtains 3RG7841 have many outstanding features, including:
Extremely compact design (17 mm x 33 mm)
Interference between adjacent devices can be avoided by selecting separatetransmission channels
Simple to connect using an M12 connector Possible to integrate a stepping-behind protection by cascading several units
Functions (e.g. restart interlock, muting) can be flexibly expanded by addingSIGUARD evaluation unit 3RG7847
Self-diagnosis system for PC-supported displays and diagnostics
Contamination and error signal output to the PLC
1.2 Approvals
EU Prototype Testing (Europe)
TV PRODUCT SERVICE GMBHRidlerstrae 31D-80339 MnchenGermany
IEC- respectively EN 61496-2 testing conducted by:
BIA Berufsgenossenschaftliches Institut fr Arbeitssicherheit(Trade Association Institute for Industrial Safety)Alte Heerstrae 111D-53757 St. Augustin
Germany
For additional information please see http://www.siemens.de/safety
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1.3 Device types and range of applications
SIGUARD light curtains 3RG7841 are available in different resolutions: 30 mmresolution to provide hand protection, 55 and 80 mm resolutions to safeguard danger
zones, and in combination as a cascaded design. Typical application areas are:
Textile machines such as power looms, sectional warping machines or beam war-ping machines
Warehouse technology, such as paternosters for shelving
Automatic assembly machines for circuit boards
Corpus presses in the timber industry
Packaging machines
Shoe machines
Rotary-cycle machines
*) Multi-sided danger point protection can be achieved by implementing deflective mirrors. In this case,the range is reduced by approx. 0.7 m per mirror.
SIGUARD Light Curtains for providing hand protection at danger points
Resolution: 30 mm (hand)Protection range: 0.3 ... 6 m *)Protection heights: 150, 225, 300, 450, 600, 750, ... 1800 mm
SIGUARD Light Curtains for safeguarding danger zones close to floor level
(75 mm and higher)
Resolution: 55 mm (shin)Protection range: 0.3 ... 6 m *)Protection heights: 300, 450, 600, ..., 1800 mm
SIGUARD Light Curtains for safeguarding danger zones at heights of 450 mmand above
Resolution: 80 mm (leg)
Protection range: 0.3 ... 6 m *)Protection heights: 450, 600, 900, 1200, 1500, 1800 mm
SIGUARD Light Curtains in a cascaded design for providing hand protectionand stepping behind protection at danger points
Resolution of Master unit: 30 mm, 55 mm, or 80 mmResolution of Slave unit: 30 mm, 55 mm, or 80 mmProtection range: 0.3 ... 6 m *)Protection heights/Master: 300, 450, 600, 750, ..., 1800 mmProtection heights/Slave: 150, 225, 300, 450, 600, 750, ..., 1800 mm
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2 Safety Precautions
2.1 General hazards caused by non-observance of safetyprecautions
SIGUARD light curtains are developed and produced with careful attention paid torecognized codes of engineering practice. However, the protective function of theequipment can be impaired if the units are not used for their intended purpose or ifthey are used improperly. Such instances can jeopardize the health and lives of thepersonnel operating the machinery. Light curtains do not provide protection againstinjuries resulting from flying objects.
2.2 Special safety instructions for use of Type 2 protective devices
Type 2 protective devices are only to be implemented where permitted by themachinery-specific C-Standard, or where the evaluation of risk according toEN 1050 or EN 954-1, Figure C1 and E1, results in a slight to medium risk level(II or III), see following examples.
For Type 2-protective devices, the protective effect is checked by periodic testing.A defect occurring between the test cycles can result in a temporary loss of theprotective function which will not be detected until the next test.Hence, shorter intervals between tests ensure higher availability of the protectivefunction. Organizations responsible for machine safety, such as the expert com-mittees of trade associations, can provide assistance in this regard. SIGUARDevaluation unit 3RG7847 provides optimal Type 2 functional safety; seeChapter 5 "Electrical installation".
Example for Level II:
Degree of injury: serious, irreversible
Frequency of the exposure to danger: rarely to occasionallyPossibility for preventing danger: possible under certain circum-
stances
Example for Level III:
Degree of injury: serious, irreversibleFrequency of the exposure to danger: rarely to occasionallyPossibility for preventing danger: virtually impossible
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2.3 Operating conditions
The relevant regulations (e.g. machinery-specific C-Standards in the EU or the
OSHA and ANSI standards in the USA) apply for the use and installation ofSIGUARD light curtains 3RG7841. In general, compliance with the followingoperating conditions is required:
SIGUARD light curtains are to be installed so that there is no possibility of gainingaccess from above, beneath or behind the sensing zone. If this is not assured,then additional protective measures must be installed.
Fig. 1
Access from above, beneath, or behind must be impossible
It must be possible to intervene in the machine controls by electrical means sothat potentially hazardous conditions in each working phase can be terminatedimmediately.
The safety clearance between the danger point and the sensing zone must besufficiently large so that the potentially hazardous condition is terminated beforethe person has reached the danger point (refer to chapter 4).
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3 Design and Function
3.1 System overview
Configured on a modular basis, SIGUARD light curtains 3RG7841 consist of a trans-mitter containing a row of IR radiation elements and a receiver containing a row ofreceiver elements. These elements are sequentially controlled and evaluated inquick succession.The transmitter and receiver are optically synchronized; it is not necessary to link thetwo components with a cable. If used as a Type 2 protective device, an external testmonitoring unit emits a periodic test signal in order to trigger a system test whichchecks the correct response of the receiver.SIGUARD evaluation units 3RG7847, for example, can function as this test monito-
ring unit. The particular advantage of this unit is that the periodic functional test isperformed cyclically in the background, without hindering the production output of theprotected machinery.
3.2 Operating mode
SIGUARD light curtains function in the mode "protective operation without restartinterlock". If sufficient receiver signal is present at all light axes, the output voltage atthe OSSD output is switched to +24 V. If one or more light axes are interrupted, the
OSSD output is shut off within the system response time. As soon as all the light axesare unobstructed again, the output automatically reverts to +24 V.
3.3 Cascading
By connecting master and slave units in succession, it is possible to link up two ormore sensing zones. Master and slave units with different resolutions can be connec-ted to one another.
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a = Couplingb = Total length including coupling, max. 400 mm
Fig. 2
Dimensional drawing Cascaded design
a
b
C
D23
11,5
34,5
A
66,
5
28
test
zoneprotection
power
transmitter
channel2
failure
PG7
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3.4 Display elements
a = transmission channel 2 (LED on) transmission channel 1 (LED off)b = object in sensing zone (output OSSD off)c = sensing zone free (output OSSD on)d = weak receiver signale = supply voltage transmitter onf = system test activeg = failure
Fig. 3
Display elements
3.5 Separate transmission channels to prevent mutual interference
Functional disturbances can result from mutual interference caused by the optical
cross-talk of adjacent units. In order to prevent these disturbance, two separate
transmission channels can be selected by setting suitable polarities for the supply
voltage cables. The transmitter and receiver of one system must each be connected
with the same polarity (= transmission channel).
Channel 1 = white at +24 V and green at 0 V;
Channel 2 = white at 0 V and green at +24 V.
transmitter
Sicherheits-hinweissafety remark:
Vor AnschlussBetriebsanleitungbeachten!Pay attention tomanual prior toinstallation!
channel 2
power
failure
receiver
Vor AnschluBetriebsanleitungbeachten!Pay attention tomanual prior toinstallation!
channel 2
failure
test
a
e
f
g
b
c
d
gprotectionzone
protectionzone
Sicherheits-hinweissafety remark:
a
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3.6 Test input
The SIGUARD transmitter is equipped with an input for the periodic functional test
(+24 V = no test; high resistance or 0 V = test).
Fig. 4
Test input
3.7 OSSD switch output
The short circuit-proof 24 V pnp switch output on the receiver is able to switch
earthed loads of up to 0.1 A. Contactors or relays must be wired parallel to the coil
with suitable spark absorbers.
3.8 Contamination and fault signal output
This pnp output normally carries +24 V. In case of a weak receiver signal caused by
contamination or misalignment, or in case of a fault, the output is switched to high
resistance. The output is short circuit-proof and can carry up to 70 mA.
3.9 Diagnostic function
The self-diagnosis system integrated into the transmitter and receiver facilitates the
device start-up as well as on-site fault localization. In case of a defective component,
the "failure" LED of the defective component lights up.
In addition, the receiver is equipped with an RS-485 interface. This allows it to be
connected to a PC in the workshop so that the infrared light axes can be visualized
on-site and detailed diagnostics can be performed.
The PC must be connected by means of an RS-485 / RS-232 interface converter, and
its serial interface must be able to handle a transmission rate of up to 57.6 Kbaud.
The diagnostics software required for visualization can be run on Windows 3.1 and
higher versions. Both the software and the interface converter are available as
optional accessories.
+ 24 V
yellow (4)transmitter
input +24 V
OSSD switch output +24 V
high resistance
or 0 V
high resistance
15-150 ms max
10 ms 10 ms
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a = transmitter
b = receiver
c = set of diagnosis cables with straight or angled connector
d = RS-485/RS-232 Interface converter
e = RS-232 serial cable
f = diagnostic softwareg = receiver connecting cable (is removed for diagnosis, the interface
converter is connected in series)
Fig. 5
Visualization and diagnostics by means of serial interface and PC
c
f
g
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4 Installation
4.1 General installation procedures
Pay close attention to the safety precautions described in Chapter 2. In general, all
units must be installed so that the danger point can be reached only by passing throu-
gh the sensing zone and that a sufficient clearance is maintained between the dan-ger point and the sensing zone (see chapter 4.2 and 4.3).
4.1.1 Distance from reflective surfaces
Reflective surfaces within the 8transmission and reception cone can cause reflec-tions that result in a non-detection of body parts. For this reason, a minimum distance
(a) must be maintained between the optical axis of the light curtain and reflective ob-jects, such as polished machine parts or material receptacles. The following diagram
shows the proper installation and the distance (a) as a dependency of the width of
the sensing zone.
a = distance to reflecting fieldb = reflecting fieldc = transmission coned = optical axise = receiving cone
Fig. 6
A sufficiently large distance (a) from reflective surfaces must be assured.a
[m] = 0,07 x protection zone width [m] + 0,005 m
sensing zone
width in m
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4.1.2 Preventing mutual interference between adjacent devices
When a receiver (receiver cone 8full angle) is located in the beam path of an adja-
cent transmitter, the overlapping ranges can result in optical cross-talk. This in turncan lead to faulty switching or, in certain circumstances, even to a temporary break-
down of the protective function. In order to prevent this from happening, two separate
transmission channels can be selected for adjacent devices (see chapter 3.5). The
units can also be mounted in opposite directions or be separated by appropriate
shielding.
Fig. 7
Preventing mutual interference by selecting separate transmissionchannels
R RT T
R RT T
T RR T
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4.2 Mounting procedures for SIGUARD light curtains(resolution 30 mm)
When mounting SIGUARD light curtains for hand protection, it is essential that thesensing zone be made inaccessible from above, below and the side. It must also be
impossible to step behind the sensing zone. If necessary, supplemental mechanical
grids must be installed, or multiple light curtains must be cascaded. The minimum
protective clearance is calculated as follows:
S = (K x T) + C
where:
S
minimum clearance between the sensing zone and the danger point in mm
(S
min
100 mm)
K
accessing rate 2 mm/ms
T machine lag time + response time of the optoelectronic protective device
(AOPD) in ms
C 8 (d - 14 mm), but not less than 0
d
detection capability (resolution) of the AOPD in mm
If this calculation results in a value for S that is greater than 500 mm, then the calcu-
lation may be repeated for K + 1.6 mm/ms. In this case, the value of S
min
must not
be less than 500 mm.
a = follow-through of machineb =
75 mm or stepping behind protectionc = signal machine STOPS = minimum safety distance
Fig. 8
Light curtain for hand respectively finger protection at a danger point
b
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4.3 Mounting procedures for SIGUARD light curtains used for thehorizontal safeguarding of danger areas(resolution 55 and 80 mm)
When the light curtains are mounted horizontally, make sure that the height of thesensing zone does not exceed 1000 mm. If H exceeds 300 mm (200 mm if children
are present), an undetected approach underneath the sensing zone is possible. This
factor must be taken into account when the risk is assessed. The minimum protective
clearance S and the installation height H are calculated as follows:
S = (1.6 mm/ms x T) + C
C = 1200 mm - 0.4 x H
where:
H
= height of the sensing zone above the plane of reference
C
min
= 850 mm
H
max
= 1000 mm
H
min
= 15 (d - 50 mm)
where:
d
resolution of the AOPD
The following admissible heights for the SIGUARD light curtains, as resulting from
this calculation, are:
resolution 55 mm: H
min
= 75 mm H
max
= 1000 mm
resolution 80 mm: H
min
= 450 mm H
max
= 1000 mm
Fig. 9
Safety clearance and installation heights for the horizontal safeguarding ofdanger zones
S H
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4.4 Mechanical installation
4.4.1 Standard mounting
The units are mounted by means of through holes in the profile end pieces. (For thedistance between holes, see the dimensional table on page 53 and the dimensional
drawing on page 54). The holes have a diameter of 5.3mm.
This fixed means of mounting is appropriate only when no adjustment is required(i.e. the mounting areas are located in one plane and the mounting positions are at
the same height).
Fig. 10
Standard mounting by using the through holes in the profile end
pieces
a
bd
a = attachment surfaceb = screw M5c = diskd = nut M5
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4.4.2 Mounting using the protective mounting profile
To provide additional mechanical protection, the light curtain can be snapped into a
protective mounting profile. This is recommended for larger protected heights and
when the unit needs to be adjustable. The protective mounting profile can be usedwith either a standard mounting plate or a swivelling mounting support with vibration
damping.
Standard mounting bracket
Swivel mounting support with Light curtain with protective
vibration damping mounting profile
(swivel range 8)
a = protective mounting profileb = longitudinal groove for freely positionable M6 T-slot nuts
c = oblong punch 13 x 6
Fig. 11
Mechanical mounting by using the protective and mounting profile
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5 Electrical installation
5.1 Installation procedures
Pay close attention to the safety precautions and operating conditions described in
Chapter 2. The electrical installation must be performed by experienced and qualifiedpersonnel.A unit only qualifies as a Type 2 protective device according to
IEC-, EN 61496-1 if combined with a test monitoring unit.The test monitoring unit
triggers a functional test of transmitter and receiver via the test input of the trans-
mitter, and it checks the switch-off function of the receiver output. If the receiver
output does not respond to the test signal within the system response time, the out-
put of the test monitoring unit assumes the "off" status. (For suitable SIGUARD
evaluation units, see the connection examples.)
5.2 Power supply
The power supply to transmitter and receiver must be 24 V DC 20 %. The maximum
power consumption is 150 mA (without load). The power supply must meet the
requirements of IEC 60742, exhibiting a safe mains separation as well as being able
to bridge short-term mains failures of up to 20 ms.
5.3 Connecting cables
The devices are connected by means of prepared shielded connecting cables, 5 mlong or 15 m long, with angled or straight M12 sockets (see Accessories). The pro-
tective screen has to be connected to PE. The cables must be laid separately from
power cables. The following tables show the wiring of the transmitter and receiver.
*) To avoid mutual interference by adjacent devices, transmission channel 2 can be chosen
by exchanging polarities (white = 0 V, green = 24 V). The wiring of the transmitter test
input (yellow) is not affected.
Fig. 12 Wiring diagram
transmitter receiver
M12plug
wirecolor
Meaning M12plug
wirecolor
Meaning
1 white +24 V*) 1 white +24 V*)
2 brown PE 2 brown PE
3 green 0 V*) 3 green 0 V*)
4 yellow Test input(0 V = Test)
4 yellow OSSD switch output
5 grey free 5 grey Weak signalError
6 pink free 6 rosa RS 485+
7 blue free 7 blau RS 485-
8 red protectivescreen/PE
8 red protective screen/PE
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5.4 Connecting examples
5.4.1 Connection with a SIGUARD evaluation unit 3RG7847-4BD
The test monitoring unit performs an automatic functional test of the light curtain
every 200 ms without impeding the production output of the protected machinery.
This quick succession of cyclical functional tests ensures a maximum of Type 2
functional safety. In addition, it expands the functional range of the light cur tain,
adding "start/restart interlock" and "protection control" functions.
a = light curtain transmitter g = external relay monitoringb = light curtain receiver h = signal output relay statusc = not connected i = signal output restart interlock statusd = RS-485 interface for diagnosis k = disconnecting path for two-e = pnp-signal output channel control
weak signal/failure m = disconnecting path for single-f = reset/start channel control
Fig. 13 Connection example light curtain with evaluation unit 3RG7847-4BD
1 654382
ws/w
h
7
Test
4 283765 1
OSSD
br/
bn
ge
/ye
gn
rt/
rd
ge
/ye
gr
gr
rs/pi
bl
bl
ws/w
h
br/
bn
gn
rt/
rd
rs/pi
+ 24V PE 0V + 24VPE0V
K2
K1
SI1 A SI1 A
PE PE
K2
K1
K2K1
+ 24V + 24V 0V
K1K2
0V
L+
Ph
L-
N
L+L-
SI 2,5A SI 6 AT
SI 6 AT
T1 T2 S1 S2
AOPDsTest
+24V
Diagn.
0V
9
4 15 24 22 23 13 14
Reset
EDM
RS232
11 2
State
10 17 6
R-Output
OSSD2
OSSD1
N.O.
N.O.
a b
c
e
g
f
h i
k m
d
3RG7847-4BD
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5.4.2 Connection with a SIGUARD evaluation unit 3RG7847-4BF
(with integrated muting function)
a = light curtain transmitter h = signal output relay statusb = light curtain receiver i = signal output restart interlock statusc = not connected k = signal outputs and warning outputsd = RS-485 interface for diagnosis m = muting indication lampe = pnp signal output (to be connected in any case!)
weak signal/failure n = disconnecting path for two-f = reset/start channel controlg = external relay monitoring o = disconnecting path for single-
channel control
Fig. 14 Connection example light curtain with evaluation unit 3RG7847-4BF
1 654382
ws
/wh
7
Test
4 283765 1
OSSD
br/
bn
ge
/ye
gn
rt/
rd
ge
/ye
gr
rs/pi
bl
ws
/wh
br/
bn
gn
rt/
rd
+ 24V PE 0V + 24VPE0V
SI 1A
PE PE
K2
K1
K2K1
+24V +24V 0V
K1
K2
0V
L+
Ph
L-
N
L+Ph
L-N
SI 2,5A SI 6AT
SI 6 AT
M2 M3
T1 T2 S1 S2
AOPDsTest
+24V
Diagn.
0V
9
4 15 24 22 23 13 1420 21 31 32
Muting
Indicators
1 2
Warn.
R
eset
EDM
M1 M2
Muting Sensors
State Outputs
S1-S2
Muting
Failure
19 33 30 28 29
RS232
State
7 6
R-Output
M3 M4
11 2
10 1
OSSD2
OSSD1
N.O.
N.O.
a b
c
ed
K2
K1
g
f
k mh i
n o
3RG7847-4BF
gr
bl
rs/pi
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6 Device Start-up
Before the unit is switched on for the first time, check the supply voltage(+24 V DC 20 %).
Turn on the supply voltage (transmitter "power" LED on, "test" LED lights up oncebriefly).
A self-test is performed in the transmitter and receiver for approx. 2 seconds.
In case of optimal adjustment, only the green LED in the receiver will still beilluminated.
If the green LED does not light up after 2 seconds, check the following points:
Make sure that the system test is not constantly activated (i.e. that the transmitter"test" LED is not constantly illuminated): If it is, connect the test input accordingto the connection example
the "test" LED will go off
Make sure that there is no object in the sensing zoneif so, remove the object.
If the "weak signal" LED (striped arrow) in the receiver is illuminated, check theorientation of the units to each other; transmitter and receiver must be mountedat the same height, and the plexiglass front screens must be exactly parallel toeach other. As soon as the orientation is optimal, the "weak signal" LED will go off.
If the "failure" LED lights up in the transmitter or receiver, the correspondingcomponent has an internal defect and must be exchanged.
7 Cleaning
The plexiglass front screens in the transmitter and receiver must be cleaned regular-
ly, depending on the amount of dirt that has accumulated. Illumination of the "weak
signal" LED and the signal output of the receiver indicate, at the latest, when cleaning
is necessary. We recommend using a mild cleaning solution for cleaning the plexi-
glass front screens. They are highly resistant to diluted acids and alkalies, and resi-
stant to organic solvents to a limited extent.
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8 Technical Dates and Dimensional Drawing
Safety class Type 2 (testable) in accordance withEN-, IEC 61496-1,-2 combined with an externalType 2 test monitoring unit (e.g. SIGUARDevaluation unit 3RG7847)
Protected heights(Heights of sensing zone)
150 ... 1800 mm for 30 mm resolution300 ... 1800 mm for 55 mm resolution450 ... 1800 mm for 80 mm resolution
Sensing zone width/range 0,3 ... 6 m
Detection capability(Resolution)
30 mm, 55 mm, or 80 mm resolution
Response time (from theinterruption of the sensingzone to the switching off ofthe OSSD output, withoutthe response time of thetest monitoring unit)
Depends on the protected height:30 mm resolution: 8...29 ms55 mm resolution: 8...19 ms80 mm resolution: 8...15 msFor precise response times, see the tablepage 53
Switch-on time delay(from the release of thesensing zone until theOSSD output is switchedon)
from 0.5 ms for all series.In case of very short interruptions of the sensingzone, the OSSD output remains off for at least100 ms.
Test duration 10 ms
Test input/transmitter +24 V = no test, 0 V or high resistance = test viarelay (positively driven) make contact or pnpoutput (signal for triggering test: min. 20 ms)
Enclosure rating IP 65
Ambient operatingtemperature
0 ... 55 C
Protective class I
Supply voltage 24 V DC 20 % (from an external power supplyunit with safe mains separation and 20 ms mainsfailure bridging)
Current consumption Transmitter: 75 mAReceiver: 75 mA (without load)
OSSD-output pnp-output, short circuit-proof, 100 mA max
Contamination and errorsignal
pnp-output, short circuit, 70 mA max
Diagnostic interface/receiver
RS-485
Electrical connection 8-pin round M12 plug-in connector
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Measures, weights and response time of SIGUARD light curtains 3RG7841
Connecting cable 7-pin, 0.25 mm2, shielded, with injection molded socket, length 5 mor 15 m (see Accessories)
Type of operation protective operation without start/restart interlock
Synchronization of trans-mitter/receiver
optical synchronization, 2 transmission channels can be selected
Dimensions cross section 17 mm x 33 mmlength = protected height + 96 mm
Atmospheric humidity 15 ... 95 % (non condensing)
Storage temperature -25 ... +75 C
Type Protectedheight =
Measure A[mm]]
Meas.B
[mm]
MountingMeasure C
[mm]
Weight[kg]
Response time[ms]
for resolution
30 mm 55 mm 80 mm
3RG7841-3.B.. 170,5 248,5 238,5 0,156 8
3RG7841-3.C.. 245,5 323,5 313,5 0,198 11
3RG7841-3.D.. 320,5 398,5 388,5 0,240 15 83RG7841-3.E.. 470,5 548,5 538,5 0,324 11 11 8
3RG7841-3.F.. 620,5 698,5 688,5 0,408 15 15 10
3RG7841-3.G.. 770,5 848,5 838,5 0,492 19 10 13
3RG7841-3.H.. 920,5 998,5 988,5 0,576 15 11 15
3RG7841-3.J.. 1070,5 1148,5 1138,5 0,660 17 13 9
3RG7841-3.K.. 1220,5 1298,5 1288,5 0,745 20 15 10
3RG7841-3.L.. 1370,5 1448,5 1438,5 0,830 22 17 11
3RG7841-3.M.. 1520,5 1598,5 1588,5 0,913 25 19 13
3RG7841-3.N.. 1670,5 1748,5 1738,5 0,997 27 14 14
3RG7841-3.P.. 1820,5 1898,5 1888,5 1,080 29 15 15
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d = space for taking off the plug
e = screw M5 or nut M5
f = M12, 8-pin
Fig. 15 Dimensional drawing of SIGUARD light curtains 3RG7841
A
66
28
10
test
zoneprotection
power
transmitter
channel2
failure
f
33
C B
c2317
d
SIGUARD
14
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a = Coupling
b = Total length including coupling, max. 400 mm
Fig. 16 Dimensional drawing SIGUARD light curtains 3RG7841Cascaded design
The response times for master and slave units are made of the sum of the partial
response times.
a
b
C
D23
11,5
34,5
A
66,5
28
test
zoneprotection
power
transmitter
channel2
failure
PG7
Dimensional table
Type Slave
Measure C
Slave
Measure D3RG7841-3.B.. 120,5 143,5
3RG7841-3.C.. 195,5 218,5
3RG7841-3.D.. 270,5 293,5
3RG7841-3.E.. 420,5 443,5
3RG7841-3.F.. 570,5 593,5
3RG7841-3.G.. 720,5 743,5
3RG7841-3.H.. 870,5 893,5
3RG7841-3.J.. 1020,5 1043,5
3RG7841-3.K.. 1170,5 1193,53RG7841-3.L.. 1320,5 1343,5
3RG7841-3.M.. 1470,5 1493,5
3RG7841-3.N.. 1620,5 1643,5
3RG7841-3.P.. 1770,5 1793,5
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9 Selection and Ordering information
9.1 Selecting a SIGUARD light curtain 3RG7841
1. Consult the relevant regulations for the application in question (e.g. machinery-specific C-Standards in the EU, or OSHA and ANSI standards in the USA).Observe the safety precautions described in Chapter 2.
2. Define the protection aim and select the appropriate series accordingly (e.g. handprotection at a danger point ---> 30 mm resolution; refer to Chapters 1.3 and 2.3)and calculate the safety clearance as shown in Chapter 4.
3. Determine the width of the sensing zone (i.e. the distance between transmitterand receiver). Multi-sided safeguarding can be achieved with the use of deflectionmirrors; this decreases the maximum range by approx. 0.7 m per mirror.
4. Determine the protected height (i.e. height of the area to be protected for verticalapplications; depth for horizontal applications). Be sure to consider the hazardsof reaching over, reaching under, crawling under, etc.
5. Select the suitable device type and locate its order number in the selection table.
9.2 Ordering information
Order numbers
Type 30 mm resolution
Standard Master Slave
transmitter 150 mmreceiver 150 mm
3RG7841-3DB003RG7841-3DB01
3RG7841-3DB203RG7841-3DB21
transmitter 225 mm
receiver 225 mm
3RG7841-3DC00
3RG7841-3DC01
3RG7841-3DC20
3RG7841-3DC21
transmitter 300 mm
receiver 300 mm
3RG7841-3DD00
3RG7841-3DD01
3RG7841-3DD10
3RG7841-3DD11
3RG7841-3DD20
3RG7841-3DD21
transmitter 450 mm
receiver 450 mm
3RG7841-3DE00
3RG7841-3DE01
3RG7841-3DE10
3RG7841-3DE11
3RG7841-3DE20
3RG7841-3DE21
transmitter 600 mm
receiver 600 mm
3RG7841-3DF00
3RG7841-3DF01
3RG7841-3DF10
3RG7841-3DF11
3RG7841-3DF20
3RG7841-3DF21
transmitter 750 mm
receiver 750 mm
3RG7841-3DG00
3RG7841-3DG01
3RG7841-3DG10
3RG7841-3DG11
3RG7841-3DG20
3RG7841-3DG21
transmitter 900 mm
receiver 900 mm
3RG7841-3DH00
3RG7841-3DH01
3RG7841-3DH10
3RG7841-3DH11
3RG7841-3DH20
3RG7841-3DH21
transmitter 1050 mm
receiver 1050 mm
3RG7841-3DJ00
3RG7841-3DJ01
3RG7841-3DJ10
3RG7841-3DJ11
3RG7841-3DJ20
3RG7841-3DJ21
transmitter 1200 mm
receiver 1200 mm
3RG7841-3DK00
3RG7841-3DK01
3RG7841-3DK10
3RG7841-3DK11
3RG7841-3DK20
3RG7841-3DK21
transmitter 1350 mm
receiver 1350 mm
3RG7841-3DL00
3RG7841-3DL01
3RG7841-3DL10
3RG7841-3DL11
3RG7841-3DL20
3RG7841-3DL21
transmitter 1500 mm
receiver 1500 mm
3RG7841-3DM00
3RG7841-3DM01
3RG7841-3DM10
3RG7841-3DM11
3RG7841-3DM20
3RG7841-3DM21
transmitter 1650 mm
receiver 1650 mm
3RG7841-3DN00
3RG7841-3DN01
3RG7841-3DN10
3RG7841-3DN11
3RG7841-3DN20
3RG7841-3DN21
transmitter 1800 mm
receiver 1800 mm
3RG7841-3DP00
3RG7841-3DP01
3RG7841-3DP10
3RG7841-3DP11
3RG7841-3DP20
3RG7841-3DP21
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Type 55 mm resolution
Standard Master Slave
transmitter 300 mm
receiver 300 mm
3RG7841-3FD00
3RG7841-3FD01
3RG7841-3FD20
3RG7841-3FD21
transmitter 450 mm
receiver 450 mm
3RG7841-3FE00
3RG7841-3FE01
3RG7841-3DE10
3RG7841-3DE11
3RG7841-3FE20
3RG7841-3FE21
transmitter 600 mm
receiver 600 mm
3RG7841-3FF00
3RG7841-3FF01
3RG7841-3DF10
3RG7841-3DF11
3RG7841-3FF20
3RG7841-3FF21
transmitter 750 mm
receiver 750 mm
3RG7841-3FG00
3RG7841-3FG01
3RG7841-3DG10
3RG7841-3DG11
3RG7841-3FG20
3RG7841-3FG21
transmitter 900 mm
receiver 900 mm
3RG7841-3FH00
3RG7841-3FH01
3RG7841-3DH10
3RG7841-3DH11
3RG7841-3FH20
3RG7841-3FH21
transmitter 1050 mm
receiver 1050 mm
3RG7841-3FJ00
3RG7841-3FJ01
3RG7841-3DJ10
3RG7841-3DJ11
3RG7841-3FJ20
3RG7841-3FJ21
transmitter 1200 mm
receiver 1200 mm
3RG7841-3FK00
3RG7841-3FK01
3RG7841-3DK10
3RG7841-3DK11
3RG7841-3FK20
3RG7841-3FK21
transmitter 1350 mm
receiver 1350 mm
3RG7841-3FL00
3RG7841-3FL01
3RG7841-3DL10
3RG7841-3DL11
3RG7841-3FL20
3RG7841-3FL21
Sender 1500 mm
receiver 1500 mm
3RG7841-3FM00
3RG7841-3FM01
3RG7841-3DM10
3RG7841-3DM11
3RG7841-3FM20
3RG7841-3FM21
transmitter 1650 mm
receiver 1650 mm
3RG7841-3FN00
3RG7841-3FN01
3RG7841-3DN10
3RG7841-3DN11
3RG7841-3FN20
3RG7841-3FN21
transmitter 1800 mm
receiver 1800 mm
3RG7841-3FP00
3RG7841-3FP01
3RG7841-3DP10
3RG7841-3DP11
3RG7841-3FP20
3RG7841-3FP21
Type 80 mm resolution
Standard Master Slave
transmitter 450 mm
Empfnger 450 mm
3RG7841-3HE00
3RG7841-3HE01
3RG7841-3HE10
3RG7841-3HE11
3RG7841-3HE20
3RG7841-3HE21transmitter 600 mm
Empfnger 600 mm3RG7841-3HF00
3RG7841-3HF01
3RG7841-3HF10
3RG7841-3HF11
3RG7841-3HF20
3RG7841-3HF21
transmitter 900 mm
Empfnger 900 mm3RG7841-3HH00
3RG7841-3HH01
3RG7841-3HH10
3RG7841-3HH11
3RG7841-3HH20
3RG7841-3HH21
transmitter 1200 mm
Empfnger 1200 mm3RG7841-3HK00
3RG7841-3HK01
3RG7841-3HK10
3RG7841-3HK11
3RG7841-3HK20
3RG7841-3HK21
transmitter 1500 mm
Empfnger 1500 mm3RG7841-3HM00
3RG7841-3HM01
3RG7841-3HM10
3RG7841-3HM11
3RG7841-3HM20
3RG7841-3HM21
transmitter 1800 mm
Empfnger 1800 mm3RG7841-3HP00
3RG7841-3HP01
3RG7841-3HP10
3RG7841-3HP11
3RG7841-3HP20
3RG7841-3HP21
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9.3 Scope of delivery and accessories
The scope of delivery includes:
1 SIGUARD light curtain 3RG7841 transmitter or receiver
1 set of instructions for connecting and operating the unit(enclosed only to the receiver)
Accessories:
Protective Mounting Profile
The snap-open profile offers additional protection and variable possibilities for moun-ting using either a standard mounting bracket or a swiveling mounting support.
a = Protective mounting profileb = SIGUARD light curtain 3RG7841
For the dimensions of B, see dimensional table on page 53
Fig. 17 Dimensional drawing protective mounting profile
B
a
b
30,65
19
30
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Order Numbers:
Type Order No.
Connecting cables with M12 socket, 5 m long, straight 3) 3RG7848-1BA
Connecting cables with M12 socket, 5 m long, angled 3) 3RG7848-1BC
Connecting cables with M12 socket, 15 m long, straight 3) 3RG7848-1BD
Connecting cables with M12 socket, 15 m long, angled 3) 3RG7848-1BE
Protective mounting profile 150 mm 3RG7848-0GB
Protective mounting profile 225 mm 3RG7848-0GC
Protective mounting profile 300 mm 3RG7848-0GD
Protective mounting profile 450 mm 3RG7848-0GE
Protective mounting profile 600 mm 3RG7848-0GF
Protective mounting profile 750 mm 3RG7848-0GG
Protective mounting profile 900 mm 3RG7848-0GHProtective mounting profile 1050 mm 3RG7848-0GJ
Protective mounting profile 1200 mm 3RG7848-0GK
Protective mounting profile 1350 mm 3RG7848-0GL
Protective mounting profile 1500 mm 3RG7848-0GM
Protective mounting profile 1650 mm 3RG7848-0GN
Protective mounting profile 1800 mm 3RG7848-0GO
Mounting brackets with accessories(sold in sets of two)1), 2)
3RG7848-0AB
Swivelling mounting with vibration damping 1), 2) 3RG7848-0BB
Mounting column 1060 mm1) 3RG7848-0CL
Mounting column 1360 mm1) 3RG7848-0CP
Mounting column1660 mm1) 3RG7848-0CR
Mounting column 1960 mm 1) 3RG7848-0CU
Deflecting mirror column 1060 mm 3RG7848-0DL
Deflecting mirror column 1360 mm 3RG7848-0DP
Deflecting mirror column 1660 mm 3RG7848-0DR
Deflecting mirror column1960 mm 3RG7848-0DU
Evaluation unit standard, low-cost, relay output 3RG7847-4BB
Evaluation unit standard, relay output 3RG7847-4BD
Evaluation unit standard, transistor output 3RG7847-4DD
Evaluation unit standard, expanded, relay output 3RG7847-4BE
Evaluation unit standard, expanded, transistor output 3RG7847-4DE
Evaluation unit muting, relay output 3RG7847-4BF
Evaluation unit muting, transistor output 3RG7847-4DF
Evaluation unit muting, expanded, relay output 3RG7847-4BG
Evaluation unit muting, expanded, transistor output 3RG7847-4DG
Evaluation unit cyclical control, relay output 3RG7847-4BH
Evaluation unit cyclical control, transistor output 3RG7847-4DH
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1) Only for use with the protective mounting profile
2) 2 pieces each required for the transmitter and for the receiver
3) 2 pieces required (for transmitter and receiver)
Type Order No.
Evaluation unit cyclical control, expanded, relay output 3RG7847-4BJ
Evaluation unit cyclical control, expanded, transistor
output
3RG7847-4DJ
Evaluation unit cyclical control, relay output 3RG7847-4BK
Evaluation unit Muting, cyclical control, transistor output 3RG7847-4DK
Evaluation unit muting, cyclical control, expanded, relayoutput
3RG7847-4BL
Evaluation unit muting, cyclical control, expanded,transistor output
3RG7847-4DL
Diagnostic software(runs on Windows 3.1 and higher versions)
3RG7848-1AC
RS 485/232 converter for diagnosis interface 3RG7848-1AD
RS 232 serial cable 3RG7848-1AE
Set of diagnosis cables (M12 connector straight) 3RG7848-1AL
Set of diagnosis cables (M12 connector angled) 3RG7848-1AM
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Automation and DrivesLow Voltage Controls and DistributionD-92220 Amberg