schmersal SLC 420 IP 69 K User manual

EN Operating instructions           pages 1 to 16
Translation of the original operating instructions
SLC 420 IP 69 K
Operating instructions
Safety light curtain
EN 1
1. About this document
1.1 Function
This operating instructions manual provides all the information you
need for the mounting, set-up and commissioning to ensure the safe
operation and disassembly of the safety switchgear The operating
instructions must be available in a legible condition and a complete ver-
sion in the vicinity of the device
1.2 Target group: authorised qualified personnel
All operations described in this operating instructions manual must
be carried out by trained specialist personnel, authorised by the plant
operator only
Please make sure that you have read and understood these operat-
ing instructions and that you know all applicable legislations regarding
occupational safety and accident prevention prior to installation and
putting the component into operation
The machine builder must carefully select the harmonised standards to
be complied with as well as other technical specifications for the selec-
tion, mounting and integration of the components
1.3 Explanation of the symbols used
Information, hint, note:
This symbol is used for identifying useful additional informa-
tion
Caution: Failure to comply with this warning notice could
lead to failures or malfunctions
Warning: Failure to comply with this warning notice could
lead to physical injury and/or damage to the machine
1.4 Appropriate use
The products described in these operating instructions are developed to
execute safety-related functions as part of an entire plant or machine It
is the responsibility of the manufacturer of a machine or plant to ensure
the correct functionality of the entire machinery or plant
Content
1 About this document
11 Function1
12 Target group: authorised qualied personnel                1
13 Explanation of the symbols used                         1
14 Appropriate use1
15 General safety instructions                              2
16 Warning about misuse2
17 Exclusion of liability2
2 Product description
21 Ordering code                                        2
22 Special versions 2
23 Scope of delivery and accessories                        2
24 Destination and use3
25 Technical data3
26 Response time (reaction time)                           4
27 Safety classication4
28 Functions4
281 Protective mode4
282 Restart interlock (manual reset)                          4
283 Fixed blanking5
284 Variable blanking5
285 Contactor control (EDM)                                6
286 Start interlock6
29 Testing6
210 Beam coding6
3 Mounting
31 General conditions 6
32 Protection eld and approach                            6
33 Alignment 7
34 Safety distance 7
341 Minimum distance to reecting surfaces                    8
35 Dimensions                                          9
36 Mounting kit MS-10389
4 Electrical connection
41 Wiring example                                      10
42 Activation of the contactor control (EDM) without software     11
43 Connector conguration Receiver & Emitter
(possibly accessories cable)                             11
5 Set-up and maintenance
51 Check before start-up 12
52 Maintenance 12
53 Regular check12
54 Half-yearly inspection 12
55 Cleaning 12
6 Diagnostic
61 LED status information 12
62 Fault diagnostic13
63 Extended diagnostic 13
7 Disassembly and disposal
71 Disassembly 14
72 Disposal14
8 Appendix
81 Contact 14
82 EC Declaration of conformity                           15
X000 / vA / 042011 / BZ-Nr 53501-2V900 / Teile-Nr 1214164 - EN / Ausgabe C

2EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
The safety switchgear must be exclusively used in accordance with the
versions listed below or for the applications authorised by the manufac-
turer Detailed information regarding the range of applications can be
found in the chapter "Product description"
1.5 General safety instructions
The user must observe the safety instructions in this operating instruc-
tions manual, the country-specific installation standards as well as all
prevailing safety regulations and accident prevention rules
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
wwwschmersalnet
The information contained in this operating instructions manual is pro-
vided without liability and is subject to technical modifications
If multiple safety components are wired in series, the Per-
formance Level to EN ISO 13849-1 will be reduced due to the
restricted error detection under certain circumstances The
entire concept of the control system, in which the safety com-
ponent is integrated, must be validated to EN ISO 13849-2
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed
Additional measures could be required to ensure that the electro-sensi-
tive device does not present a dangerous breakdown, when other forms
of light beams are available in a special application (eg use of wireless
control devices on cranes, radiation of welding sparks or effects of
stroboscopic lights)
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of the
safety switchgear, personal hazards or damages to machin-
ery or plant components cannot be excluded The relevant
requirements of the standards EN ISO 13855 (successor of
EN 999) and EN ISO 13857 must be observed
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual The manufacturer shall accept no liability for damages result-
ing from the use of unauthorised spare parts or accessories
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, conversions and modifications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modifications
to the device
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SLC 420-E/R
➀
-
➁
-69-RFB
No. Option Description
➀
xxxx Protection field heights in mm available
lengths: 0170, 0250, 0330, 0410, 0490,
0570, 0650, 0730, 0810, 0890, 0970, 1050,
1130, 1210, 1290, 1370, 1450
➁
14 Resolution 14 mm
with a range of 03 m … 7 m
30 Resolution 30 mm with a
range of 03 m … 10 m
Only if the information described in this operating instruc-
tions manual are realised correctly, the safety function and
therefore the compliance with the Machinery Directive is
maintained
2.2 Special versions
For special versions, which are not listed in the order code below 21,
these specifications apply accordingly, provided that they correspond to
the standard version
2.3 Scope of delivery and accessories
Accessories included in delivery
Connecting cable for emitter and receiver
Cable length 5,0 m, cable connector M12 x 1; 4-pole fixed to transmit-
ter, M12 x 1; 8-pole fixed to receiver integrated
Mounting kit MS-1038
The kit includes 4 mounting angles, material V4A and 16 fixing screws,
material V4A for fixation to the end caps
Test rod PLS
The test rod is used for testing the protection field
Optional accessory
Connecting cable for transmitter
Item Number Designation Description Length
1207741 KA-0804 Female connector M12, 4-pole 5 m
1207742 KA-0805 Female connector M12, 4-pole 10 m
1207743 KA-0808 Female connector M12, 4-pole 20 m
Connecting cable for Receiver
Item Number Designation Description Length
1207728 KA-0904 Female connector M12, 8-pole 5 m
1207729 KA-0905 Female connector M12, 8-pole 10 m
1207730 KA-0908 Female connector M12, 8-pole 20 m
BUS converter NSR-0801
Converter for parameterisation and diagnostics Detailled information
can be found in the operating instructions manual of the NSR-0801
Included in delivery: integrated connecting cable, PC-software USB 20
connection (L x W x H, 122 x 60 x 35 mm), indications of measure-
ments without cable

3
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
MSD4 Vibration damper
Kit consisting of: 8 vibration dampers 15 x 20 mm, 8 M5 cylinder head
screws with hexagon socket, 8 spring washers
The MSD4 vibration damper kit must be used for damping vibrations
and oscillations on the safety light curtain SLC 420 For applications
with higher mechanical stresses, eg presses, punching machines, we
recommend the MSD4 kit In this way, the availability of the safety light
curtain SLC 420 is increased
2.4 Destination and use
The SLC 420 is a non-contact, self-testing safety guard, which is used
for the protection of hazardous points, hazardous areas and machine
accesses If one or more light beams are interrupted, the hazardous
movement must be stopped
The protective enclosure with IP 69K protection class is suitable for
applications, which need to be cleaned permanently (default cleaning
procedure) A Goretex compensating membrane prevents fogging and
the penetration of liquids during high temperature fluctuations
If liquids with aggressive ingredients are used for cleaning,
please check whether the product used is compatible with the
material of the sensor (refer to chapter "Technical data")
The user must evaluate and design the safety chain in ac-
cordance with the relevant standards and the required safety
level
2.5 Technical data
Standards: EN 61496-1; CLC/TS 61496-2;
EN ISO 13849; EN 62061
Material of the enclosure: Aluminium
Protective tube: PMMA Plastic tubes
End plugs: PA 6
Membran: PA 6, Gore Tex Membran M12 x 15
Number of beams: 2 … 144 Beams
Protection field heights
Resolution 14 mm: 170 mm … 1450 mm,
(170, 250, 330, 410, 490)
Resolution 30 mm: 170 mm … 1450 mm,
(170, 250, 330, 410, 490)
Detection sensitivity for test bodies: 14 mm, 30mm
Range of the protection field: 03 … 70 m; (Resolution 14 mm)
0,3 … 10,0 m; (resolution 30 mm)
Response time:
1 … 48 L = 10 ms, 49 … 144 L = 20 ms without beam coding A
1 … 48 L = 15 ms, 49 … 144 L = 27 ms with beam coding A
Rated operating voltage: 24 VDC ±10% (PELV) supply unit to EN
60204 (power drop > 20 ms)
Operating current: 400 mA max + 05 A (OSSD load + output signal
quality load)
Wave length of the sensor: 880 nm
Safety outputs (OSSD1, OSSD2): 2 x PNP-type semi-conductor,
short-circuit proof
Switching voltage HIGH¹: 15 … 28,8 V
Switching voltage LOW¹: 0 … 2 V
Switching current: 0 … 500 mA
Leakage current²: 1 mA
Load capacity: 2 µF
Load inductance: 2 H
Admissible conduction resistance
between OSSD and load: 2,5 Ω
Supply cable: 1 Ω
Contactor control (EDM)
Input voltage HIGH (inactive): 17 … 29 V
Input voltage LOW (active): 0 … 25 V
Input current HIGH: 3 … 10 mA
Input current LOW: 0 … 2 mA
Input restart interlock (manual reset)
Input voltage HIGH (active): 17 … 29 V
Input voltage LOW (inactive): 0 … 25 V
Input current HIGH: 3 … 10 mA
Input current LOW: 0 … 3 mA
Function: Protective mode, start and restart interlock (manual reset),
contactor control, beam blanking fixed and floating
Signal times
Contactor control: 50 … 500 ms, einstellbar
Restart interlock (manual reset): 50 ms … 1,0 s, signal trans-
mission in case of trailing edge
Start interlock: 250 … 1500 ms, adjustable
LED indications transmitter: Transmitting, status
LED indications receiver: OSSD ON, OSSD OFF, restart, signal
reception, blanking, multifunction
Connection: screwed cable gland M16 x 15
cable connector M12 x 1; 4-pole fixed to transmitter,
M12 x 1; 8-pole fixed to receiver integrated
Ambient temperature: −10° C … +50° C
Storage temperature: −25° C … +70° C
Interface: Diagnostics and function setting
Protection class: IP 69K
Resistance to vibrations: 10 … 55 Hz to IEC 60068-2-6
Resistance to shock: 10 g; 16 ms; to IEC 60068-2-29
Year of construction: as of 2010 version 10
¹) To IEC 61131-2
²) In case of failure, the leakage current at the most flows to the OSSD
cable The downstream control element must recognise this state as
LOW A safety PLC must detect this state

4EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
2.6 Response time (reaction time)
The response time depends on the hight of the protected field, the
resolution, the number of light beams and the beam coding
Resolution 14 mm
Protected
height
[mm]
Beams
[Number]
Response
time
[ms]
Response time
with beam cod-
ing A
[ms]
Weight
[kg]
170 16 10 15 16
250 24 10 15 19
330 32 10 15 23
410 40 10 15 26
490 48 10 15 30
570 56 20 27 33
650 64 20 27 37
730 72 20 27 41
810 80 20 27 45
890 88 20 27 48
970 96 20 27 52
1050 104 20 27 56
1130 112 20 27 60
1210 120 20 27 64
1290 128 20 27 68
1370 136 20 27 72
1450 144 20 27 76
Resolution 30 mm
Protected
height
[mm]
Beams
[Number]
Response
time [ms]
Response time
with beam cod-
ing A
[ms]
Weight
[kg]
170 8 10 15 16
250 12 10 15 19
330 16 10 15 23
410 20 10 15 26
490 24 10 15 30
570 28 10 15 33
650 32 10 15 37
730 36 10 15 41
810 40 10 15 45
890 44 10 15 48
970 48 10 15 52
1050 52 20 27 56
1130 56 20 27 60
1210 60 20 27 64
1290 64 20 27 68
1370 68 20 27 72
1450 72 20 27 76
2.7 Safety classification
Standards: EN ISO 13849-1, EN 62061
PL: up to e
Control category: up to 4
PFH value: 742 x 10-9 / h
SIL: up to 3
Service life: 20 years
2.8 Functions
The system consists of a receiver and a transmitter For the described
functions, no further switching elements are required For the diagnostics
and function selection, a user-friendly PC-software is offered as accessory
For the connection to a PC, the NSR-0801 BUS converter is required
(not included in delivery)
The system has the following features:
• Protective mode (automatic start after release of the protected field)
• Start interlock
• Restart interlock (manual reset)
• Contactor control EDM
• Beam coding
• Blanking of fixed protection field areas
• Blanking of movable protection field areas
Factory setting
The SLC 420 system features many functions without additional
devices The following table gives an overview of the possible functions
and the factory settings configuration
Function Factory set-
ting
Configuration
Protective mode not active External wiring
Restart interlock
(manual reset)
not active External wiring
Blanking fixed/vari-
able
not active With BUS converter NSR-
0801 and PC-software
Contactor control not active With BUS converter NSR-
0801 and PC-software
Start interlock not active With BUS converter NSR-
0801 and PC-software
Beam coding not active With BUS converter
NSR-0801 and PC-software
2.8.1 Protective mode
The protective mode switches the OSSD outputs to ON state (protec-
tion field not interrupted), without external release of a switching device
This type of protection generates an automatic restart of the machine if
the protection field is not interrupted
This operating mode may only be chosen in conjunction with
the restart interlock (manual reset) of the machine
This operating mode must not be chosen, when persons can
step behind the protection field
2.8.2 Restart interlock (manual reset)
The restart interlock (manual reset) prevents an automatic enabling of
the outputs (OSSD's ON state) after switch-on of the operating volt-
age or an interruption of the protection field The system switches the
outputs only to ON state, when an external command device (restart
button) generates an enabling signal at the restart input (receiver)
The command devices (enabling button) must be installed
outside of the hazardous area The operator must have a
clear view on the hazardous area when actuating the ena-
bling button
In supply condition, the restart interlock (manual reset)
neither the protective mode is active You must choose one of
both operating modes to enable the OSSD outputs If no type
of protection is selected, you will obtain the following signali-
sation through the LED status indication in the receiver:
LED OSSD OFF (red) + LED restart (yellow) flashing

5
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
2.8.3 Fixed blanking
The SLC 420 can blank stationary parts in the protection field
Multiple protection field areas can be blanked If small changes are
made within the fixed blanking area, each time 1 beam can be addition-
nally blanked to increase the tolerance Refer to the chapter Variable
blanking
Fixed blanking area
E1 R1
The range of the fixed blanking can be arbitrarily chosen in the protec-
tion field
The first beam line, which realises the optical synchronisation and is
located immediately behind the diagnostic window, cannot be blanked
The area of the fixed blanking must not be modified after the teach-in
process Any change of the area or removal of the part from the protec-
tion field will be detected by the system As a result, the outputs are
disabled (locked) This locking can be neutralised by executing a new
teach-in process in accordance with the actual beam interruptions
The function is activated by means of the NSR-0801 BUS
converter and a PC or laptop The activation of the function
is signaled by the LED blanking flashing in the diagnostic
window of the receiver
The remaining lateral areas must be protected against intru-
sion by means of mechanical covers
The lateral covers must be fixed with the object
Partial covers are not authorised
After the fixed blanking, the protection field must be tested by
means of the test rod
The restart interlock function of the safety light curtain or the
machine must be activated
The standard IEC/TS 62046 includes information, which
describes possibly required additional measures to prevent a
person from reaching a hazard through the blanking areas of
a protection field
2.8.4 Variable blanking
The SLC 420 can blank movable parts in the protection field
Cylinder for material ejection
The function enables an arbitrary floating blanking of partial areas in the
protection field The first beam, which is located immediately behind the
diagnostic window, cannot be blanked
The SLC 420 can blank one or more beams in the protection field A
combination of fixed and variable blanking is possible
This function allows for an interruption of the protection height without
the outputs being disabled in case of material movement in the protec-
tion field, eg material ejection or process-controlled material move-
ment This extension of the object detection increases the resolution
In this way, the physical resolution changes into an effective resolution
This effective resolution must be used to calculate the safety distance
This effective resolution must be used to calculate the safety distance
Use formula (2) to calculate the safety distance with the effective
resolution if a maximum of 1 light beams are blanked; use formula (2)
indicated in the "Safety distance" chapter if more than 3 light beams are
blanked
The number of beams to be blanked is limited by the software
In a system with a 14 mm physical resolution, the effective resolution
is increased to 34 mm in case of a variable blanking of 2 beams The
effective resolution must be registered permanently and clearly visible
onto the label affixed to the receiver
Effective resolution
The effective resolution in case of activated blanking of floating beams
can be found in the following table:
Beams
blanked
Physical
Resolution
Effective
resolution
1 14 24
2 14 34
3 14 44
4 14 54
5 14 64
6 14 74
7 14 84
8 14 94
Beams
blanked
Physical resolution Effective resolution
1 30 45
2 30 65
3 30 85
4 30 105
The function is activated by means of the NSR-0801 BUS
converter and a PC or laptop The activation of the function
is signaled by the LED blanking flashing in the diagnostic
window of the receiver
Perform a new calculation of the safety distance with the
effective resolution Adjust the safety distance in accordance
with your calculation!
After configuration, the protection field must be checked by a
responsible person by means of a test rod; in addition to that,
this person must compare the size of the blanked area to the
object size and if necessary provide for additional covers or a
larger distance of the safety guard with regard to the hazard-
ous point The standard IEC/TS 62046 includes information,
which describes possibly required additional measures to
prevent a person from reaching a hazard through the blank-
ing areas of a protection field

6EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
2.8.5 Contactor control (EDM)
The contactor control monitors the controlled switching elements
(auxiliary contacts of the contactors) of both outputs This monitoring
is realised after each interruption of the protection field and prior to the
restart (enabling) of the outputs In this way, malfunctions of the relays
are detected, eg contact welding or contact spring breakage If the
light curtain detects a malfunctioning of the switching elements, the
outputs are locked, ie after elimination of the failure, a Power Reset is
required The auxiliary contacts must only be connected, when the
function is activated!
After fault rectification, the operating voltage must be once switched off
and back on (power reset)
The contactor control is not activated upon delivery This
function is activated by means of the NSR-0801 BUS con-
verter and a PC or laptop
Activation of the contactor control (EDM) without software
The contactor control can be activated without PC software as of
firmware version 123, by means of cable bridges (refer to wiring
diagram)
2.8.6 Start interlock
The start interlock prevents an automatic start of the machine when the
supply voltage is switched on After enabling of the start interlock - by
the one-time interruption of the protection field -, this protective function
is deactivated until the next power reset
The start interlock is not activated upon delivery This function
is activated by means of the NSR-0801 BUS converter and a
PC or laptop
2.9 Testing
The system performs a complete self-test and safety test within 2 sec-
onds after the operating voltage has been switched on If the protection
field is not interrupted, the system switches to the ON condition In case
of an error, the outputs at the receiver do not switch to the ON state
The LED OSSD OFF starts flashing, thus emitting an error message
Further indications can be found in the chapter Fault diagnostic
During operation, the system continuously executes a self-test Safety-
relevant faults are detected within the cycle time and cause the outputs
to be switched off
2.10 Beam coding
The beam coding of the safety light curtain must be adjusted, when
systems operating in each other's vicinity and a set-up as shown in the
image below (no interference) is impossible When supplied, the beam
coding is not active With beam coding A, a receiver can distinguish the
beams of the transmitter with the same beam coding A, which are des-
tined to this particular receiver, from foreign beams The beam coding A
must be set for each sensor (receiver and transmitter) individually The
function is activated by means of the NSR-0801 BUS converter and a
PC or laptop
If adjacent systems are operated without beam coding, the user is at
risk
no interference
E ER R
Interference: beam coding required!
E RR E
• The beam coding increases the safety and avoids mutual interference
of adjacent systems
• The beam coding increases the immunity against optical interference
(eg sun light, welding sparks)
• The beam coding A is permanently shown by the transmitter and the
receiver by means of flashing LED's (refer to LED status information)
The response time of the system is increased when beam
coding A is used To this end, the safety distance must be
adjusted to the hazardous movement Refer to chapter
Response time
3. Mounting
3.1 General conditions
The following guidelines are provided as a preventative warning notice
to ensure safe and appropriate handling These guidelines are an
essential part of the safety instructions and therefore must always be
observed and respected
• The SLC must not be used on machines, which can be
stopped electrically in case of emergency
• The safety distance between the SLC and a hazardous ma-
chine movement must always be observed and respected
• Additional mechanical safety guards must be installed so
that the operator has to pass by the protection field to reach
the hazardous machine parts
• The SLC must be installed so that the personnel always
must be within the detection zone when operating the ma-
chine An incorrect installation can lead to serious injuries
• Never connect the outputs to +24VDC If the outputs are
wired to +24VDC, they are in ON state, as a result of which
they are unable to stop a hazardous situation occuring on
the application/machine
• The safety inspections must be conducted regularly
• The SLC must not be exposed to inflammable or explosive
gasses
• The connecting cables must be connected in accordance
with the installation instructions
• The fixing screws of the end caps and the mounting angle
must be firmly tightened
• When fitting the sensors, please observe that the cable
output is at the bottom in order not to affect the functionality
of the membrane
3.2 Protection field and approach
The protection field of the SLC consists of the entire range located
between the protection field markings of transmitter and receiver Ad-
ditional protective devices must ensure that the operator has to pass by
the protection field to reach the hazardous machine parts
The SLC must be installed so that personnel are always located within
the detection zone of the safety device when operating the hazardous
machine parts to be secure

7
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
Correct installation
Hazardous machine parts can only be reached
after passing through the protection field
The presence of staff members between the
protection field and hazardous machine parts
must be prevented/avoided (protection against
stepping over)
Unauthorised installation
Hazardous machine parts can be reached with-
out passing through the protection field
The presence of staff members between the
protection field and hazardous machine parts is
enabled
3.3 Alignment
Procedure:
1 The transmitter and the receiver must be fitted parallel to each other
and at the same height
2 Turn the transmitter and monitor the diagnostic window of the
receiver Fix the light curtain, when the LED OSSD ON (green) is on
and the LED signal reception (orange) is off
3 Determine the max rotating angle to the left and to the right, at which
the LED OSSD ON (green) is on and tighten the mounting screws in
central position Make sure that the LED signal reception (orange) is
not on or flashing
3.4 Safety distance
The safety distance is the minimum distance between the protection
field of the safety light curtain and the hazardous area The safety dis-
tance must be observed to ensure that the hazardous area cannot be
reached before the hazardous movement has come to standstill
Calculation of the safety distance to EN ISO 13855 (successor of
EN 999) and EN ISO 13857
The safety distance depends on the following elements:
• Stopping time of the machine (calculation by run-on time measure-
ment)
• Response time of the machine and the safety light curtain and the
downstream relay (entire safety guard)
• Approach speed
• Resolution of the safety light curtain
Safety light curtain SLC 420
The safety distance for resolutions 14 mm up to 40 mm is calculated by
means of the following formula:
(1) S = 2000 mm/s * T + 8 (d - 14) [mm]
S = Safety distance [mm]
T = Total reaction time (machine stopping time, reaction time of the
safety guard, relays, etc)
d = Resolution of the safety light curtain
The approach speed is covered with a value of 2000 mm/s
If value S <= 500 mm after the calculation of the safety distance, then
use this value
If value S >= 500 mm, recalculate the distance:
(2) S = 1600 mm/s * T + 8 (d - 14) [mm]
If the new value S > 500 mm, use this value as safety distance
If the new value S < 500 mm, use a minimum distance of 500 mm
Example:
Reaction time of the safety light curtain = 10 ms
Resolution of the safety light curtain = 14 mm
Stopping time of the machine = 330 ms
S = 2000 mm/s * (330 ms + 10 ms) + 8(14 mm - 14 mm)
S = 680 mm
S = > 500 mm, therefore new calculation with V = 1600 mm/s
S = 544 mm
The safety distance for resolutions 41 mm up to 70 mm is calcu-
lated by means of the following formula:
(3) S = ( 1600 mm/s * T ) + 850 mm
S = Safety distance [mm]
T = Stopping time of the machine + reaction time of the safety light
curtain
K = Approach speed 1600 mm/s
C = Safety supplement 850 mm
If the effective resolution is more than 70 mm, the detection
of bodily parts is no longer guaranteed; to that end, the risks
such as reaching into, climbing through and reference heights
above the ground must be observed
(refer to DIN EN ISO 13855) The formula (3) is also applica-
ble to the calculation of the safety distance for the effective
resolution from 41 mm to 300 mm
The safety distance between the safety light curtain and the
hazardous point must always be respected and observed If
a person reaches the hazardous point before the hazardous
movement has come to standstill, he/she is exposed to seri-
ous injuries

8EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
Safety distance to the hazardous area
Limit of the hazardous point
Safety distance (S)
Protection field marking
Tool - upper part
Signal to stop the
hazardous movement
Standstill of the hazardous
movement
tn = tB - tA
Tool - lower part
tA
S
tB
≤ 75 mm = max distance for protection against stepping over
To prevent persons from stepping over the protection field
this dimension must be imperatively respected and observed
The formulae and calculation examples are related to the vertical set-up
(refer to drawing) of the light curtain with regard to the hazardous point
Please observe the applicable harmonised EN standards and possible
applicable national regulations
The successor standards of the EN 999 for calculating the
minimum distances of the safety guards with regard to the
hazardous point are EN ISO 13855 and EN ISO 13857
3.4.1 Minimum distance to reflecting surfaces
During the installation, the effects of reflecting surfaces must be taken
into account In case of an incorrect installation, interruptions of the
protection field could possibly not be detected, which could lead to
serious injuries The hereafter-specified minimum distances with regard
to reflecting surfaces (metal walls, floors, ceilings or parts) must be
imperatively observed
8° 8°
a= 262 mm
Access direction
Receiver
Obstacle
optical axis
Transmitter
reflecting body
(eg Material container)
Limit of the hazardous
point
a=130mm
5° 5°
Safety distance a
a [mm]
D [m]
0 3 5 10
100
200
300
400
500
600
700
800
900
1000
15 20
Calculate the minimum distance to reflecting surfaces as a function of
the distance with an aperture angles of ± 25° degrees or use the value
from the table below
Distance between transmitter
and receiver [m]
Minimum distance a [mm]
02 … 30 130
4 175
5 220
7 310
10 440
15 660
Formula: a = tan 2.5° x L [mm]
a = Minimum distance to reflecting surfaces
L = Distance between transmitter and receiver

9
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
3.5 Dimensions
All measurements in mm
60
B
80
A
C
D
42
91
54
Legend
AProtection eld height
BSensor length
CMounting dimension
Dtotal length
Type A B C D
SLC 420-E/R0170-xx-69-RFB 170 267 315 351
SLC 420-E/R0250-xx-69-RFB 250 347 395 431
SLC 420-E/R0330-xx-69-RFB 330 427 475 511
SLC 420-E/R0410-xx-69-RFB 410 507 555 591
SLC 420-E/R0490-xx-69-RFB 490 587 635 671
SLC 420-E/R0570-xx-69-RFB 570 667 715 751
SLC 420-E/R0650-xx-69-RFB 650 747 795 831
SLC 420-E/R0730-xx-69-RFB 730 827 875 911
SLC 420-E/R0810-xx-69-RFB 810 907 955 991
SLC 420-E/R0890-xx-69-RFB 890 987 1035 1071
SLC 420-E/R0970-xx-69-RFB 970 1067 1115 1151
SLC 420-E/R1050-xx-69-RFB 1050 1147 1195 1231
SLC 420-E/R1130-xx-69-RFB 1130 1227 1275 1311
SLC 420-E/R1210-xx-69-RFB 1210 1307 1355 1391
SLC 420-E/R1290-xx-69-RFB 1290 1387 1435 1471
SLC 420-E/R1370-xx-69-RFB 1370 1467 1515 1551
SLC 420-E/R1450-xx-69-RFB 1450 1547 1595 1631
Accessories
3.6 Mounting kit MS-1038
14,5
42
18,9
20
6,5
40
32
52
21
¤5,5

10 EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
4. Electrical connection
4.1 Wiring example
5
Kn 1
Kn 2
S 1
K 1 K 2
6182734
Schützkontrolle/EDM (RD)
DIAG IN (WH)
DIAG IN (GY)
DIAG OUT (PK)
Freigabe WA (WH)
DIAG OUT (BK)
0 V DC (BU)
0 V DC (BU)
OSSD 1 (GN)
OSSD 2 (YE)
+24 V DC (BN)
+24 V DC (BN)
Brücke 1
Brücke 2
Erdung
E 1
Nur für Diagnose
1
23
4
DIAG IN (WH)
Only for Diagnostic DIAG OUT (BK)
+24 VDC (BN) 0 VDC (BU)
DIAG IN (GY)
DIAG OUT (PK)
Bridge 1
Bridge 2
Release WA (WH)
Contactor control/EDM (RD)
+24 VDC (BN) 0 VDC (BU) OSSD 1 (GN) OSSD 2 (YE)
Earth connection
Restart interlock (manual reset) (bridge 1)
By bridging DIAG IN (pin 5) and DIAG OUT (pin 6), the restart interlock
(manual reset) is activated
Protective mode (bridge 2)
By bridging DIAG OUT (pin 6) and authorised operation (pin 1), the
protective mode is activated
K1, K2: Relay for processing the switching outputs OSSD 1,OSSD 2
Kn1, Kn2: Auxiliary contacts of the last switching relay (optional) signals at input
EDM (pin 8): only to be connected when the function is activated
S1: Command device for restart (optional)
E1: Power supply 24 VDC ± 10%
To ensure correct functionality, an operating mode (restart
interlock or protective mode) must be selected

11
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
4.2 Activation of the contactor control (EDM) without software
The contactor control can be activated without PC software as of
firmware version 123 in diagnostic mode by means of cable bridges
(refer to wiring diagram)
To activate the EDM function without PC software, proceed in the fol-
lowing way:
Establish the connections in accordance with the wiring diagram,
see below, with two cable bridges
Both outputs OSSD1 and OSSD2 of the light curtain must be
separated from the machine control
1) Wire OSSD 1 + 2 to 24 V (pin 2 + 3 + 4)
2) Wire DIAG_IN to DIAG_OUT (pin 5 + 6)
3) Wire S1 or enabling button WA between pin1 and pin2
S1
E1
24VDC
561 82734
grey pink white red brown blue green yellow
Execute the parameter assignment according to the following
instructions:
1 Power ON
2 The light curtain detects faults and the EDM programming mode is
activated
3 Red LED flashes for 10 seconds at 2 Hz and blue LED shows during
this period of time the current EDM state (supply state: OFF = EDM
not active)
4 The EDM programming is realised, when at the same time three
impulses are emitted by button S1 at 24V Impulse duration ON time
> 200 ms, OFF time > 200 ms
5 A successful EDM programming is confirmed by the green LED flash-
ing three times (1Hz) During this time, the blue LED shows the new
EDM state (ON = EDM active) After that, the OSSD fault mode of the
light curtain is activated The red LED flashes four times If the EDM
programming was not successfull or timed out, the OSSD fault mode
of the light curtain is immediately activated The red LED flashes four
times
6 Power OFF
7 Remove cable bridges PIN 2 + 3 + 4 and if necessary cable bridge
PIN 5 + 6
8 Wire OSSD 1 + 2 (pin 3 + 4)
9 Power ON
To reverse the EDM function, repeat the procedure step 27
If the programming was not successful, the procedure can also be
repeated
The state of the EDM function is shown in diagnostic mode through the
blue LED (ON = EDM active)
An EDM function, which is deactivated by means of the PC
software, can not be activated in this way
4.3 Connector configuration Receiver & Emitter
(possibly accessories cable)
Cable: Connector male
M12 / 8 pole
Signal
Designation Description
5
8
4
3
2
1
7
6
1 WH Restart Input
2 BN 24 VDC Power supply
3 GN OSSD 1 Safety output 1
4 YE OSSD 2 Safety output 2
5 GY Diagnostic IN Input diagnostic data
6 PK Diagnostic OUT Output Diagnostic data
7 BU 0 VDC Power supply
8 RD Contactor con-
trol EDM
Input
Accessory Cable: Connector
female M12 / 8 pole
5
8
4
3
21
7
6
Cable: Connector male
M12 / 4 pole
Signal
Designation Description
3
2
1
4
1 BN 24 VDC Power supply
2 WH Diagnostic IN Input diagnostic data
3 BU 0 VDC Power supply
4 BK Diagnostic OUT Output Diagnostic data
Accessory Cable: Connector
female M12 / 4 pole
3
21
4
The cables (transmitter and receiver) are permanently xed
to the sensors by means of an M16 x 15 cable gland
The colour codes are only valid for the cable types mentioned
below "optional accessories"
5. Set-up and maintenance
Please check the need / utilisation of the function (refer to
chapter "Functions") in your application prior to the instal-
lation The functions, which require the NSR-0801 BUS
converter for the parameter settings, must be activated,
before you possibly remove the cable connector To realise
the connection in the control cabinet, we recommend not
to remove the cable connector at the sensor with additional
cable socket (plug)

12 EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
5.1 Check before start-up
Prior to start-up, the following items must be checked by the responsi-
ble person
Wiring check prior to start-up
1 The voltage supply is a 24V direct current power supply, which meets
the CE Directives, Low Voltage Directives A power downtime of 20
ms must be bridged
2 Presence of a voltage supply with correct polarity at the SLC
3 The connecting cable of the transmitter is correctly connected to the
transmitter and the connecting cable of the receiver correctly to the
receiver
4 The double insulation between the light curtain output and an exter-
nal potential is guaranteed
5 The outputs OSSD1 and OSSD2 are not connected to +24 VDC
6 The connected switching elements (load) are not connected to +24
VDC
7 If two or more SLC are used within close range compared to each
other, an alternating arrangement must be observed Any mutual
interference of the systems must be prevented (see chapter "Beam
coding") 
Switch the SLC on and check the operation in the following way:
The component performs a system test during approx 2 seconds after
the operating voltage has been switched on After that, the outputs are
enabled if the protection field is not interrupted The LED "OSSD ON" of
the receiver is on
In case of incorrect functionality, please follow the instructions
listed in the chapter Fault diagnostic
5.2 Maintenance
Do not use the SLC before the next inspection is terminated
An incorrect inspection can lead to serious and mortal inju-
ries
Conditions
For safety reasons, all inspection results must be archived The operat-
ing principle of the SLC and the machine must be known in order to
be able to conduct an inspection If the fitter, the planning technician
and the operator are different persons, please make sure that the user
has the necessary information at his disposal to be able conduct the
maintenance
5.3 Regular check
A regular visual inspection and functional test, including the following
steps, is recommended:
1 The component does not have any visible damages
2 The optics cover is not scratched or soiled
3 Hazardous machinery parts can only be accessed by passing
through the protection field of the SLC
4 The staff remains within the detection area, when works are con-
ducted on hazardous machinery parts
5 The safety distance of the application exceeds the mathematically
calculated one
Operate the machine and check whether the hazardous movement
stops under the hereafter-mentioned circumstances.
6 Hazardous machine parts do not move when the protection field is
interrupted
7 The hazardous machine movement is immediately stopped, when
the protection field is interrupted with the test rod immediately before
the transmitter, immediately before the receiver and in the middle
between the transmitter and the receiver
8 No hazardous machine movement when the test rod is within the
protection field
9 The hazardous machine movement comes to standstill, when the
voltage supply of the SLC is switched off
5.4 Half-yearly inspection
The following items must be checked every six months or when a ma-
chine setting is changed
1 Machine stops or does not inhibit any safety function
2 No machine modification or connection change, which affects the
safety system, has taken place
3 The outputs of the SLC are correctly connected to the machine
4 The total response time of the machine does not exceed the re-
sponse time calculated during the first putting into operation
5 The cables, the connectors, the caps and the mounting angles are in
perfect condition
5.5 Cleaning
If the optics cover of the sensors is extremely soiled, the OSSD outputs
can be disabled Clean with a clean, soft cloth with exercising pressure
The use of agressive, abrasive or scratching cleaning agents, which
could attack the surface, is prohibited
6. Diagnostic
6.1 LED status information
Receiver Function LED colour Description
Multifunction
Blanking
Signal recep-
tion
Restart
OSSD OFF
OSSD ON
Protection eld
Multifunction green Function display, Beam coding
Blanking blue Protection field(s) inactive (blanking)
Signal reception orange Safety-monitoring module of Signal reception
Restart yellow Input for command device
OSSD OFF red Safety outputs Signal condition OFF
OSSD ON green Safety outputs Signal condition ON
Transmitter Function LED colour Description
Transmitting Status
Protection eld
Transmitting orange Transmitter active
Status green Function display, Beam coding

13
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
Receiver
LED Status LED Description
OSSD ON On Protection field clear
flashing Diagnostic mode active
OSSD OFF On Protection field interrupted, system or configuration error
flashing Diagnostic mode active, error output refer to Fault diagnostic table
Restart On Start or restart interlock (manual reset) active, signal expected at output WA
Signal reception ON/flashing Signal reception too low, check alignment and installation height between transmitter and receiver
Cleaning the black profile cover
OFF Alignment between transmitter and receiver OK
Blanking 1 flash Fixed blanking of the protection field(s)
2 flash Floating blanking, max 1 beam
3 flash Variable blanking, more beams
4 flash Floating (max 1 beam) and fixed blanking of protection field(s)
5 flash Variable (multiple beams) and fixed blanking of protection field(s)
Multifunction flashing Beam coding A is active
Transmitter
LED Status LED Description
Transmitting On Standard operation, transmitter active
flashing Configuration error
Status flashing Beam coding A is active
6.2 Fault diagnostic
The light curtain performs an internal self-test after the operating voltage is switched on and the protection field is enabled When a fault is detected,
a corresponding flashing pattern is emitted at the receiver through the LED OSSD OFF (red) Every fault emission is followed by a one-second
pause
LED OSSD OFF Fault feature Action
OSSD OFF and LED restart
continuous flashing
Wiring error for function selection
(Restart interlock (manual reset), automatic
mode)
Check connection at the receiver, bridge 1 or
bridge 2 must be wired (refer to Wiring)
1 flash Error at sensor receiver Replace receiver
2 flash Error contactor control OFF Check connections at contactor control input, refer to
Wiring, check wiring of the auxiliary contacts
3 flash Error contactor control ON Check wiring at contactor control input, short-circuit at +UB and
mass Power reset after fault rectification
4 flash Errors at the OSSD outputs Check the wiring of the outputs, OSSD for short-circuit at +UB and
mass
5 flash Error configuration data Check components in case of cascading, check configuration settings
by means of the NSR-0801 BUS converter
6 flash Error blanking The receiver has detected blanked beams as beams without inter-
ruption, ie locking Check the configuration settings by means of the
NSR-0801 BUS converter, repeat the teach process with blanking
6.3 Extended diagnostic
By means of the optional SLC 420 configuration software and the
NSR-0801 BUS converter, an extended diagnostic can be executed
The software provides the status information of the component and
can represent the individual light lines This feature enables an optimal
adjustment of the light curtain The diagnostic mode is signalled by the
OSSD ON and OSSD OFF LED‘s at the receiver In diagnostic mode,
protective mode is disabled, the ODDS outputs being locked The
change from diagnostic mode to protective mode is automatically real-
ised after Power Reset, when the BUS converter is no longer integrated
and the connecting cable of the sensor is reconnected

14 EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
7. Disassembly and disposal
7.1 Disassembly
The safety switchgear must be disassembled in a de-energised condi-
tion only
7.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations
8. Appendix
8.1 Contact
Consultancy / Sales:
KA Schmersal GmbH
Industrielle Sicherheitsschaltsysteme
Möddinghofe 30
D-42279 Wuppertal
Tel:[phone]
Fax:[phone]
You will also find detailed information regarding our product variety on
our website: www schmersalcom
Repair handling / shipping:
Safety Control GmbH
Am Industriepark 11
D-84453 Mühldorf/ Inn
Tel: [phone]
Fax: [phone]

15
EN
SLC 420-B-EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
Appendix
The currently valid declaration of conformity can be down-
loaded from the internet at wwwschmersalnet
8.2 EC Declaration of conformity
Name of the safety component / type: SLC 420 IP69K
Description of the safety component: Safety light curtain
Harmonised EC-Directives: 2006/42/EC - EC-Machinery Directive
2004/108/EC - EMC-Directive
Applied standards: EN 61496-1:2004 + A1 2008
CLC/TS 61496-2:2006
EN ISO 13849-1:2008; PL e
EN 62061:2005; SIL 3
Person authorized for the compilation
of the technical documentation:
Ulrich Loss
Möddinghofe 30
42279 Wuppertal
Notied body for the prototype test: TÜV Nord Cert GmbH
Langemarckstr 20
45141 Essen
ID n°: 0044
EC-prototype test certicate: n° 44 205 10 555867 005
Place and date of issue: Wuppertal, February 1, 2010
Authorised signature
Christian Spranger
Managing Director
Authorised signature
Klaus Schuster
Managing Director
EC Declaration of conformity
Translation of the original declaration of conformity Safety Control GmbH
Am Industriepark 33
84453 Mühldorf / Inn
Germany
We hereby certify that the hereafter described safety components both in its basic design and con-
struction conform to the applicable European Directives

Safety Control GmbH
Am Industriepark 33
D-84453 Mühldorf / Inn
Telefon +49 - (0)86 31 - 187 - 9 60
Telefax +49 - (0)86 31 - 187 - 9 61
E-Mail: info@safetycontrolcom