3rg7841 standard cat. 2 light curtain

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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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



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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