SICK MSL Parts list manual

MSL
Multi-beam
Safety Light Barriers
Technical Description

2
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
Contents
Approvals
EU Europe
EU-sample es by:
TÜV Rheinland
Am Grauen S ein
D-51105 Köln
Tes number BB 9511541 01
E 9512741 E 01
6 Operating modes 17
6.1 Self configura ion 17
6.2 Res ar inhibi 17
6.3 Ex ernal device
moni oring 17
6.4 Mu ing wi h addi ional
MSM module 17
7 Electrical
installation 18
7.1 General 18
7.2 Sender uni 19
7.2.1 MCC- es inpu 19
7.2.2 Scanning range of he
sender uni 19
7.3 Receiver uni 20
7.3.1 Swi ching ou pu s 20
7.3.2 Ou pu : Con amina ion
warning (OWS) 20
7.3.3 Inpu : Ex ernal Device
Moni oring (EDM) 21
7.3.4 Inpu : Res ar swi ch (RES) 21
7.4 Example circui s 22
8 Connectordiagrams 23
9 Diagnosiselements 26
10 Technical
specifications 27
11 Dimensional
diagrams 29
12 MSL selection table 30
13 Accessory selection
table 32
14 Checklist 34
1 General 3
1.1 Fea ures 3
2 Safetyinstructions 4
2.1 Areas of use of he device 4
2.2 In ended use of he device 5
2.3 General safe y ins ruc ions
and precau ions 5
2.4 Safe y ins ruc ions 6
2.4.1 Pre-commissioning es s 6
2.4.2 Regular es ing of he
safe y device by exper s 6
2.4.3 Daily es ing 6
3 Function 7
3.1 S a us indica or 7
3.2 Diagnosis elemen s 7
3.3 Diagnosis aids 7
4 Applicationsand
application
requirements 8
4.1 Applica ions 8
4.2 Applica ion requiremen s 8
4.3 Corner mirrors and
columns 9
5 Mechanical
installation 10
5.1 General 10
5.2 Safe y dis ance o poin of
danger, de ermina ion of
safe y dis ance 10
5.2.1 General formula for he
safe y dis ance according
o EN 999 10
5.2.2 Safe y dis ance for mul i-
beam access con rol
according o EN 999 10
5.2.3 Safe y gap for horizon al
mul i-beam danger area
guarding according o
EN 999 11
5.3 Dis ance from reflec ive
surfaces 12
5.4 Mul iple safeguarding 12
5.5 Mechanical fixing 13
5.6 Moun ing he mirror
columns 14
5.7 Corner mirror PSK 45 16
Caution sign
Non-observance can
cause dangerous
si ua ions
Application hint
Technical hin s for
correc and efficien
applica ion
cer ified by DQS according o
DIN EN ISO 9001 Reg.-No. 462-03
QUALITY SYSTEM

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SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
1 General
Mul i-beam safe y ligh barriers
from SICK are con ac less
pro ec ion ins alla ions. They are
2par hrough beam configura ions,
consis ing of a sender and receiver
uni and are sui able for access
con rol and danger zone pro ec ion
applica ions.
The MSL fulfils he pr EN 50 100
(pr EN 61 496) requiremen s, safe y
ca egory 4. In ha i is a self
moni oring, con ac less pro ec ion
ins alla ion.
The devices were conceived for
indus rial applica ions and benefi
from he following advan ages:
‡Proven know-how in he mos
up- o-da e echnology
‡No mechanically wearing par s
‡Adven ageous dimensions
‡S able modular cons ruc ion
‡Universal applica ion possibili ies
‡Simple ins alla ion
1 General
1.1 Features
Special fea ures of he MSL mul i-
beam safe y ligh barrier are lis ed
below:
‡In egra ed evalua ion wi h s a e-
of- he-ar elec ronics and
especially developed ICs (ASICs)
‡Ac ively moni ored
semiconduc or ou pu s
‡Conduc or moni oring
‡Pluggable erminal chamber wi h
PG screws or differen device
connec ors
‡Shor response ime (20 ms)
‡Large signal reserve (fac or 2)
‡Op ical synchronisa ion of
sender and receiver uni s
‡Mul iple safeguarding by means
of corner mirrors and columns
‡Complian wi h pr EN 50 100
(pr EN 61 496) regula ions
‡EU sample es
‡Opera ing modes:
Elec ronic Device Moni oring
(EDM)
Res ar Inhibi
‡Mu ing as a supplemen ary
module

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SICK MSL
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2 Safety instructions
The device can only fulfil i s safe y
func ion when i is used correc ly;
his applies o bo h "safe", i. e. error-
proof, connec ion and accura e
posi ioning.
‡The MSL mul i-beam safe y ligh
barrier complies wi h he safe y
regula ions of: safe y class 4
according o pr EN 50 100.
2.1 Areas of use of the
device
The MSL mul i-beam safe y ligh
barrier is used o guard access o
hazardous areas on machinery or
plan . The devices are fixed across
he access area a he necessary
safe y dis ance from he danger
poin and send a S op signal o he
machine or plan when a leas one
beam of ligh is in errup ed.
The following informa ion is
applicable for prac ical applica ion
purposes:
Maximum scanning range 20 m or
70 m
Minimum resolu ion 73 mm
Maximum beam gap 500 mm
Minimum number of beams 2
Maximum number of beams 35
Minimum housing leng h 370 mm
Maximum housing leng h 1800 mm
Fig. 2: Sys em cons ruc ion of he MSLZ safe y ligh barrier
2 Safe y ins ruc ions
Fig. 1: Sys em cons ruc ion of he MSL mul i-beam safe y ligh barrier
S rahlabs and
Gehäuselänge
Sende-
elemen
Empfangs-
elemen
Lich s rahl-
durchmesser 23 mm
90˚
90˚
Umlenkspiegel
Umlenkspiegel
max. 7,5 m
Sender
elemen
Ligh beam diama er
23 mm
Opera ing range
max. 7.5 m
Receiver
elemen
Housing leng h
Corner
mirror
Corner
mirror
Beam gap
500 mm
Beam gap
The MSL mul i-beam safe y ligh
barrier consis s of wo componen s:
‡MSLS sender uni and
‡MSLE receiver uni
Bo h work wi h a leas 2 and a
mos 35 ligh beams. Be ween he
wo uni s, he individual beams of
ligh crea e a pro ec ive field defined
by he number of beams and heir
spacing.
Gehäuselänge
Reichwei e
S rahlabs and
Sende-
einhei Empfangs- einhei
Lich s rahl-
durchmesser
23 mm
Auflösung
Housing leng h
Scanning
range
Ligh beam
diame er 23 mm
Sender Receiver
Resolu ion

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SICK MSL
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The posi ion of he ligh beams is
indica ed by a marking on he
housing.
Synchronisa ion be ween sender
uni and receiver uni is achieved
op ically, by means of a pre-defined
encoded sequence, hus elimina ing
he need for galvanic connec ion
be ween sender and receiver.
The MSLZ variant
The MSLZ ligh barrier, like he MSL
is a con ac less pro ec ion
ins alla ion – bu wi h one passive
side and one ac ive side (
fig. 2 ). I is
sui able for access con rol and
danger zone pro ec ion wi h a pas-
sive mirror side, and a maximum
dis ance of 7.5 m. The MSLZ fulfils
he pr EN 50 100 (pr EN 61 496)
regula ions, safe y ca egory 4.
2.2 Intended use of the
device
The MSL mul ibeam safe y ligh barrier
may only be used as specified in
sec ion 2.1, Areas of use of he device .
If i is used in any o her way, or if i is
modified in any way – including during
ins alla ion and moun ing – SICK AG
shall no be held liable for any
warran y claims arising.
2.3 General safety instructions and precautions
1 Ins alla ion, commissioning, use and
rou ine echnical checking of he
non-con ac safe y device is sub-
jec o na ional and in erna ional
regula ions and s andards, in
par icular:
‡ Regula ions derived from he
Machinery Direc ive 98/37
EC
‡ Regula ions derived from he
Use of Equipmen Direc ive
89/665 EEC
‡ Relevan safe y regula ions
‡ Applicable acciden
preven ion regula ions and
safe y rules.
The manufac urers and users of
he machinery on which our safe y
devices are used are solely
responsible for ascer aining all
applicable safe y s andards and
regula ions from he compe en
au hori ies and for ensuring
compliance wi h hose s andards
and regula ions.
2 Furthermore, he ins ruc ions
laid down – and in particular
the test requirements (see
Tes ing ) se ou in his Technical
Description and in he Operating
Instructions (including ins ruc ions
rela ing o use, moun ing, ins al-
la ion and in egra ion in o he
machine con rol sys em) – mus be
followed.
3 The es s mus be performed by
qualified experts or by
authorized and competent
personnel and mus be
documen ed in such a way as o
be verifiable a any ime.
4 The Opera ing Ins ruc ions mus
be made available o the
employee (opera or) of he
machine on which our safe y
device is used. The employee
mus be ins ruc ed by qualified
experts.
5 The es pro ocol according o he
use of he non-con ac safe y
device is prin ed a he end of
his Technical Description .
Accep ance es ing is performed
on he basis of ha pro ocol.
The ac ive side con ains he sender
and receiver elemen s wi h a beam
gap of 500 mm (
fig. 2 ). The passive
side is realised wi h corner mirrors.
The following key specifica ions are
valid for he MSLZ:
Dis ance:
Ac ive/passive side max. 7.5 m
Beam gap 500 mm

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SICK MSL
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2.4 Safety instructions
2.4.1 Pre-commissioning tests
‡The pre-commissioning es s
confirm compliance wi h he
safe y requiremen s se ou in
he na ional and in erna ional
regula ions and s andards, in
par icular he regula ions derived
from he Machinery Direc ive
and he Direc ive governing Use
of Equipmen (EC Cer ifica e of
Conformi y).
‡Tes effec iveness of he safe y
device on he machine in all
opera ing modes programmable
on he machine according o he
checklis (a he end of his
Technical Descrip ion ).
‡The personnel opera ing he
machine pro ec ed by he safe y
device mus be ins ruc ed by
qualified exper s. This ins ruc ion
is he responsibili y of he
machine opera ing company.
2.4.2 Regular testing of the
safety device by experts
‡Tes according o na ional and
in erna ional regula ions and
s andards a he in ervals
specified. These es s should
reveal modifica ions or
manipula ions of he safe y
device rela ive o he ini ial
commissioning s a us.
‡The es s are performed on he
basis of he checklis (a he end
of his
Technical Descrip ion ) in
he even of major modifica ions
o he machine or safe y device,
as well as af er rese ing or repair
in he even of damage o he
housing, fron screen, e c.
2.4.3 Daily testing
Tes by supervising personnel of
he opera ing company prior o
each work shif .
MSL with "Number of beams"
indication on rating plate
(verticalmounting)
Tes by full coverage of a leas one
beam of ligh . The red LED on he
receiver uni / MSLZ mus ligh up.
MSL with "Resolution"
indication on rating plate
(horizontalmounting)
Tes of he correc dis ance
be ween he horizon ally moun ed
pho oelec ric safe y swi ch and he
mechanical limi of he machine. To
perform he es , ge close up he
machine (
fig. ). Only he red LED
may ligh up.

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SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
3 Function
3 Func ion
Bo h sender and receiver uni s are
supplied wi h a vol age of 24 V DC.
The sender uni con ains he sender
module, which ransmi s he infra-
red, encoded ligh impulses.
3.1 Status indicator
The respec ive opera ing s a es are
indica ed by indica ors on he
sender and receiver uni of he MSL
(
fig. 3 ).
3.2 Diagnosis ele ents
The LEDs on he sender and he
receiver (or on he MSLZ) are also
used for diagnosis of he respec ive
opera ing s a us. See
Table 1 for
senders up to serial number
9652xxx and senders from serial
number 9701xxx ( able 2).
3.3 Diagnosis aids
The indica ors on he sender and
receiver uni enable rapid
roubleshoo ing for he Service
depar men .
Fig. 3: Indica ors on he sender and receiver uni of he MSL mul i-beam pho oelec ric
safe y swi ch
amber
yellow
red
green
amber
yellow
Tab. 2: Indica ors on he receiver uni or on he MSLZ
LEDs Function / cause
green red amber yellow
Ligh beam free and ou pu s ac ive
Ligh beam broken an ou pu s inac ive
1/s Ac ua e command uni
2/s 2/s Lockou
Con amina ion
Receiver unit
LED off LED illumina ed LED flashing LED no influence
LEDs Function/cause
amber yellow
Opera ing vol age applied
Sender ac ive
MCC es ; lockou
Opera ing vol age applied
8/s 8/s Lockou : sender
1/s MCC es
Sender ac ive, range 15 - 70 m
Sender ac ive, range 0,5 - 20 m
Sender unit
³ 9 701 xxx £ 9 652 xxx
Tab. 1: LEDs on he sender: up o serial number 9 652 xxx, and from serial number
9 701 xxx
LED off LED illumina ed LED flashing LED no influence

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SICK MSL
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4 Applications and application require ents
4 Applica ions
4.1 Applications
The MSL mul i-beam safe y ligh
barrier can be used for safeguarding
access o dangerous areas and for
danger zone pro ec ion.
Typical areas of applica ion are:
‡Hazardous zone guarding (
fig. 4 )
‡Access con rol for processing
areas (
fig. 5 ), cu ing and s acking
machines, palle ing areas and
paving machines.
4.2 Application
require ents
The pro ec ive func ions of he MSL
can only be used when he
following condi ions are sa isfied:
‡I mus be possible o con rol he
machine or ins alla ion
elec rically.
‡I mus be possible o hal
hazardous machine movemen .
‡The MSL mus be so ins alled
ha en ry in o he danger zone
mus in errup one or more of
he ligh beams.
An absolu ely safe swi ch-off can
only hen be assured if he ligh
beam diame er of 23 mm is fully
covered.
Release can only be achieved by
unlocking he res ar inhibi wi h he
help of a res ar swi ch.
The res ar swi ch mus be placed
such ha i canno be pressed from
inside he danger zone.
Fig. 5: Tri-beam MSL mul i-beam safe y ligh barrier for safeguarding access o a robo .
Umlenkspiegel
Corner mirror
Fig. 4: Access guarding wi h 5-beam MSL mul i-beam pho oelec ric safe y swi ch

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SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
The MSL should be moun ed such
ha upon in errup ion of he ligh
beam, he dangerous loca ion can
only be reached if he dangerous
condi ion of he machine has been
neu ralised. The requiremen for his
is ha here is a safe y dis ance
be ween he ligh beams and he
neares poin of danger.
This safe y dis ance is defined as per
EN 999 (see
5.2 Safe y dis ance for
dangerous zones
).
Persons si ua ed inside he danger
zone, bu ou side he pro ec ion
field are no recognised. I mus
herefore be ensured ha a dan-
gerous condi ion is only possible
when here is nobody presen in
he danger zone.
The relevan legal and governmen
regula ions are o be complied wi h
for he implemen a ion of pro ec-
ion ins alla ions. These regula ions
vary, depending on areas of appli-
ca ion.
4.3 Corner irrors and
colu ns
When he MSL is used in conjunc-
ion wi h one or wo corner mir-
rors, 2 or 3 sides can be pro ec ed
respec ively (
fig. 6 ). Use of mirrors
reduce he scanning range e. g. for a
device wi h normal scanning range
of 70 m he range is reduced o
approx. 61 m for 2 mirrors
approx. 42 m for 4 mirrors
Fig. 6: Mul i-sided access con rol o danger zones wi h MSL mul i-beam safe y ligh barrier.
Machine
Machine
Machine
Safe y gap oo
small
Spiegelsäule
Mirror column
Mirror column Mirror column
Mirror column

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SICK MSL
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5 Mechanical installation
5.1 General
The MSL can be fi ed in any
required posi ion. The devices are
o be moun ed such ha he danger
zone can only be reached by
in errup ing a leas one ligh beam.
The choice of he MSL ype,
number of beams and beam gaps
are de ermined by he requiremen s
of he respec ive machine and
specifica ions of he relevan
regula ion body.
When assessing he risk si ua ion,
considera ion mus be made o he
possibili y of bypassing he
pro ec ion field by:
‡Crawling undernea h
‡Reaching over he op
‡Reaching hrough wo ligh
beams
‡Climbing hrough wo ligh
beams
Fig. 7: Safe y dis ance and heigh of he poin of danger for mul i-beam ver ical access
pro ec ion
5.2 Safety distance to
point of danger,
deter ination of
safety distance
A safe y dis ance mus be main-
ained be ween he pro ec ion field
and he poin of danger. This safe y
dis ance should guaran ee ha he
poin of danger can only be
reached by he ime he hazardous
mo ion of he machine has come o
res (
fig. 7 ). The safe y dis ance
(according o EN 775, 999 and 294)
is dependen on:
‡The s op ime of he machine
‡The response ime of he
pro ec ion ins alla ion
‡The person's speed of approach.
The s op ime is a specifica ion of
he machine i self.
5.2.1 General formula for the
safety distance in
accordancewith
EN 999
The saf ey dis ance S is calcula ed
from he formula
S = (K  T) + C
S Safe y dis ance in mm
T S op ime of machine plus
response ime
C Cons an for calcula ed dis ance
in mm
K Speed of approach
5.2.2 Safety distance for multi-
beam access control in
accordancewith
EN 999
Several individual beams are used o
preven invasion of he whole body
or par s of he body which are
larger han he minimum resolu ion
(beam gap + 23 mm beam
diame er). The approach speed is
aken as 1600 mm/s and C is
850 mm.
The minimum dis ance o he poin
of danger is hus:
S = (1600 mm/s  T) + 850 mm
The posi ion of he beams is also o
be observed (
able 3 ).
5 Mechanical ins alla ion
Table 3: Number of ligh beams, heigh above relevan level and beam gap
Number of Height above reference level Beam gap
beams (e. g. floor, in mm) in mm
2 400, 900 500
3 300, 700, 1100 400
4 300, 600, 900, 1200 300
Poin of danger
Mechanical
safeguarding
En ry/exi
guarding wi h
MSL Direc ion of en ry in o
hazardous area

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SICK MSL
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5.2.3 Safety gap for horizon-
tal multi-beam danger
area guarding accord-
ing to EN 999
The safe y gap for horizon al zone
guarding is calcula ed using he
following formula:
S = (1600 mm/s  T) +
(1200 mm  0,4  H)
H Heigh of pro ec ive field above he
reference level, e. g. floor, in mm.
Wi h his configura ion, he heigh
(H) of he pro ec ive field mus no
be grea er han 1000 mm. During
risk assessmen , unin en ional access
by creeping under he ligh beams
mus be aken in o considera ion.
The minimum permissible heigh (H)
of he pro ec ive field mus be
calcula ed as follows:
H = 15 (d  50 mm)
d Resolu ion of safe y device
The resolu ion is derived from gap
+ ligh beam sec ion.
Example:
Resolution MSL Height H in
mm mm
73 mm 345
93 mm 645
Fig. 8: Safe y gap S and heigh H for hazardous guarding
La eral
par i ioning wall
Direc ion of en ry
in o danger area
Poin of opera ion
Access guarding
wi h MSL

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SICK MSL
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5.3 Distance fro
reflective surface
Reflec ive surfaces loca ed (placed
or fixed) wi hin he sender and
receiver range, may cause reflec ion
and hus preven an obs acle from
being reliably de ec ed.
For his reason, a minimum dis ance
"a" from reflec ive surfaces o he
op ical axis (linear connec ion
be ween MSLS and MSLE) mus be
main ained (see
fig. 9 ). The
dis ance "a" is dependen on he
dis ance be ween he sender and
receiver (
fig. 10 ).
5.4 Multiple
safeguarding
If wo MSL uni s are used per
guarding sys em, i mus be ensured
ha he wo uni s canno influence
each o her. Since he ligh beams
diverge, heir cross-sec ion becomes
grea er as he dis ance be ween he
MSLS and he MSLE increases. The
ligh beams from he sender uni
may only be received by i s
accompanying receiver uni . To
elimina e any mu ual influence, i
mus be ensured ha hey are
posi ioned correc ly during
ins alla ion (
fig. 11 and 12 ).
Fig. 10: Necessary safe y dis ance (a) in rela ion o he dis ance be ween sender and
receiver uni s.
Fig. 9: Correc assembly, correc alignmen , no diver ed reflec ion
Fig. 11: The sender and receiver mus be
ins alled in he same direc ion, ins alla ion
ro a ed by 180° is no permi ed.
R
S
Poin -of-opera ion
boundary
Reflec ive surface
Dis ance a in mm
Fig 12. Ins alla ion of wo MSL sys ems in series: wi h differen beam direc ions (above), wi h
wall be ween wo sys ems (below)
R
R
RR
R
R
S
S
S
S
S
S
S

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SICK MSL
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5.5 Mechanical fixing
In he basic ki , 4 slider nu s wi h
M5 Thread are provided for bo h
sender uni and receiver uni . These
slider nu s are fas ened in o he slo
on he side of he housing. Ei her
rigid, hinged or shock absorbing
moun ing bracke s are available as
op ional accessories (
fig. 13 ).
The rigid bracke can be used
where no large mechanical
olerances need o be compensa ed
for. The hinged bracke allows for
± 2° horizon al adjus men of he
sensor. In addi ion o his, he
bracke can be used in conjunc ion
wi h shock absorbers o reduce he
vibra ional forces. The bracke s are
fas ened o he sender and receiver
uni s by means of slider nu s in he
housing.
To preven shif ing of he ligh
barrier, he bracke mus be
fas ened a 20 - 30 mm (60 mm
on he erminal chamber side) from
he end caps.
Part no.
7 021 352
Part no.
2 017 751
Part no.
2 017 752
2 018 742
±2˚
±2˚
5,3
12
24
10
22
44
14
25
4,8 50
ø 8,3
5
80
65
23
90
65 25
23
51 18
51
30
30
40
40
11
11
M5
Nu ens ein
Befes igung an Maschine
M5 x 10
Fig. 13: Mechanical op ions for MSL (from op o bo om): Rigid bracke , hinged bracke and
bracke wi h shock absorber.
Slider nu

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SICK MSL
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Fig. 14: Column 400: lef – mirror column, righ – device column
5.6 Mounting the irror colu ns
Column 400
Spiri level
Levelling screws
(Allen ype)
Levelling screws
Levelling screws
Shim pla e
Par no. 4 031 053
Bo om pla e
Bo om pla e
Uni sloping
Bottomplate
15 mm hick
Shim plate
Par no. 4 031 053
3 mm hick
Accessory
for M10 screw ype
fas ening
(e. g. impac ie-bol )
Levelling screws
(impac ie-bol )
Shim pla e
Par no. 4 031 053
Bo om pla e
Dimensions in mm

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Fig. 15: Column 500: lef – mirror column, righ – device column
Column500
Shim pla e
Par no. 4 031 053
Levelling screws
(impac ie-bol )
Bottomplate
15 mm hick
Shim plate
Par no. 4 031 053
3 mm hick
Accessory
for M10 screw ype
fas ening
(e. g. impac ie-bol )
Spiri level

16
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
5.7 Corner irror The PSK 45 corner mirror ( fig. 16 )
is no sui able for column moun -
ing. The par number 5 306 053
con ains an assembly ki .
The PSZ corner mirror is espacially
sui ed o he MSLZ as a passive side
(
fig. 17 ). The mirrors are housed in
he MSLZ housing profile. The PSZ
offers he following advan ages:
‡Mirror does no have o be
cleaned (IP 65 enclosure)
‡Easy o adjus
‡Toleran o small adjus men
errors
Fig. 17: Dimensions of he PSZ corner mirror
80
96,5
8,5
80
63
40
8,5
8,5
69,5
146,5
40,5
45˚
76
Ø 5,5
Fig. 16: Dimensions of he PSK 45 corner mirror
55
52
10,5
2,2
3,5
6,7
14
6
Abmessung der Schiebemu ernu
A
F
B
20
E
Dimensions of he slider nu
Cen re of he mirror
surface
Dimensions in mm
Dimensions in mm
ABCDEF
PSZ01-1501 500 668 508 80 81 87
PSZ01-1401 400 581 421 80 101 80

17
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
6 Operating odes
In he case of MSL mul i-beam
pho oelec ric safe y swi ches, i is
possible o selec differen opera ing
modes a he device (depending on
requiremen s).
6.1 Self configuration
If you wish o configure he device
yourself, SICK offers raining o
provide he necessary know-how.
6.2 Restart inhibit
(restart switch)
‡ Withoutrestartinhibit:
When he pro ec ive field has
been broken and released again,
he pro ec ive field is au oma i-
cally reac iva ed o be ac ua ed
(e. g. s ar bu on), and he MC
can con inue i s hazardous
mo ion once he beam pa h is
free. In his case, he res ar
inhibi mus be an elemen of
he MC's con rol sys em.
‡ With restart inhibit:
When he pro ec ive field has
been broken and released again,
hen ou pu s are only reac iva -
ed af er a command uni has
been ac ua ed. The MC can
hen con inue i s hazardous
mo ion once he ligh beam is
free.
6.3 External device
onitoring (EDM)
Ex ernal device moni oring is a
safe y func ion which checks o
ensure ha he con ac s and relays
direc ly connec ed o he ou pu s
are func ioning correc ly.
Deselectingexternaldevice
monitoring
‡If a reliable PLC is used
‡If ex ernal device moni oring is
used in he machine con rol
sys em
Elec rical connec ion of he receiver
uni and he exac func ional
principle are described in
7.3.3
Ex ernal device moni oring inpu
.
The vol age supply mus be
disconnec ed when he opera ing
mode is changed.
6.4 Muting with
additional MSM
odule
Transpor ing ma erial o he
produc ion si e wi hou in errup ing
opera ing procedures is a problem
of en faced in au oma ic produc ion
processes.
The pho oelec ric safe y swi ch is
no able o dis inguish be ween
ma erial and personnel.
The mu ing circui wi h i s ex ernal
sensors as addi ional module is a
solu ion o his problem. Mu ing
briefly deac iva es he pro ec ive
field provided by he pho oelec ric
swi ch o allow objec s o be
ranspor ed in o he danger area.
The in erac ion of he pho oelec ric
ligh swi ch, he mu ing sensors, and
he mu ing con roller in he addi-
ional module enable he sys em o
make a simple dis inc ion be ween
personnel and ranspor ed objec s,
and his in urn ensures safe y.
De ailed func ional and connec ion
informa ion can be found in he
Technical descrip ion MSM .
6 Opera ing modes

18
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
7 Electrical installation
7 Elec rical ins alla ion
Elec rical connec ion work may
only be carried ou in a vol age
free condi ion.
7.1 General
Connec ing he MSL componen s
is easy. The sender and receiver
uni s are connec ed direc ly o he
machine con rol uni . An addi ional
evalua ion uni is no necessary.
The exac cabling requiremen s are
lis ed in chap er
9, Technical
specifica ions.
The machine con rol uni has a 5-
wire connec ion o he sender uni
and an 8-wire connec ion o he
receiver uni .
The maximum cross sec ion of a
conduc or is 1.5 mm2 solid or
1 mm2 sleeved. Bo h componen s
have a plugggable erminal block in
he erminal chamber. Al erna ively,
he erminal chamber can be
provided wi h a pre-prepared con-
nec or inser .
Bo h componen s are supplied
wi h a vol age of 24 V DC ± 20 %.
The opera ing vol age is connec ed
be ween + 24 V and 0 V.
In accordance wi h EN 60 204, he
ex ernal vol age supply mus be able
o bridge a shor drop-ou 20 ms
(Umin = 18 V). Sui able power
supplies are available from SICK as
op ional accessories (Siemens
6 EW 1 family).

19
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
7.2 Sender unit
The elec rical connec ion diagram
of he sender uni is shown in
fig. 18 .
7.2.1 MCC  test input
The es procedure enables an
inspec ion of he swi ching elemen s.
The sender uni is swi ched off for
his process. A break con ac from
he machine con rol uni is applied
o he es inpu (MCC = machine
con rol con ac ). The es proce-
dure is riggered when he break
con ac is open for a leas 100 ms
(
fig. 19 ). The es ing mus be carried
ou a ime when here is no
hazardous machine mo ion.
Fig. 19: Tes ing he MSL wi h he MCC – es inpu
Fig. 20: Conversion of he MSL for 70 m scanning range.
5
6
RW 70 m
+24 V
3 K
Auslieferzus and mi Tes
*) n. c. no connec ed
Fig. 18: Connec ion diagram for he sender uni : Lef , scanning range up o 20 m, righ ,
scanning range up o 70 m.
MSLS....2
Scanning range up o 20 m
MSLS....1
Scanning range up o 70 m
If he es is unsuccessful, he
machine mus receive a swi ch-off
signal from he machine con rol uni .
7.2.2 Scanning range of the
sender unit
The connec ion diagram for sender
uni wi h scanning range 15 o
70 m is shown in fig. 20 .
A shor circui bridge is o be
applied be ween con ac s 5 and 6
in he erminal block (when using a
PG screw ype) or in he cable
socke (when using In erconnec ron
connec ors).
The es inpu may only be used
o check any connec ed
swi ching elemen s.
Defaul condi ion
upon delivery wi hou es wi h es

20
SICK MSL
8 007 653/09-04-01 Technical Descrip ion • MSL © SICK AG • Safe y Sys ems • Germany • All righ s reserved
1
2
3
4
5
6
7
8
+24 V
0 V
OSSD1
OSSD2
RES
EDM
OWS
Fig. 21: Wiring diagram of he receiver uni
or MSLZ
7.3 Receiver unit
The elec rical connec ion diagram
of he receiver uni and he MSLZ is
shown in
fig. 21 .
7.3.1 Switchingoutputs
Bo h ou pu s OSSD 1 and OSSD 2
are ac ively moni ored, shor -circui
proof PNP semiconduc or ou pu s.
The ou pu s can be loaded wi h a
maximum of 0.5 A and are no
floa ing, bu are referenced o 0 V.
For unobs ruc ed ligh beams, bo h
ou pu s are ac ive HIGH. The
ou pu vol age Ua of bo h channels
is dependen on he supply vol age
Uv and he swi ched load, and is a
leas
Ua ³ UV – 3 V
7.3.2 Output: Contamination
warning(OWS)
The con amina ion warning ou pu
(OWS = Ou pu Weak Signal) is a
shor -circui proof PNP semi-
conduc or ou pu which is ac ive
(HIGH) for an unobs ruc ed bu
weak ligh beam (
fig. 22 ). This
ou pu is no floa ing bu is
referenced o 0 V.
The OWS ou pu s of several MSLs
can be connec ed oge her o
one
signal recep or or a PLC inpu . Par-
allel swi ching of several MSL
con amina ion warning is possible
("wired OR").
The maximum ou pu curren is
100 mA.
Fig. 22: The con amina ion warning ou pu
+24V
7OWS
Vol age a ou pu
(s andard implemen a ion)
Ligh barrier con amina ed + 24 V
Ligh barrier no con amina ed 0 V
Note
Connection of the receiver
outputs OSSD 1 and OSSD 2
(fig. 23)
‡An addi ional supply vol age
mus no be applied o he
ou pu s
‡Bo h ou pu signals mus be
processed separa ely. They
mus no be connec ed in
series or parallel