Leuze electronic DDLS 538 S2 Series User manual

We reserve the right to make technical changes
EN • 2020-11-09 • 50141812
Original operating instructions
DDLS 538 ... S2 ...
Optical Data Transmission for EtherCAT - Version F3/F4

© 2020
Leuze electronic GmbH + Co. KG
In der Braike 1
73277 Owen / Germany
Phone: [phone]
Fax: [phone]
www.leuze.com
[email protected]
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 2

Table of contents
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 3
Table of contents
1 About this document ............................................................................................5
1.1 Used symbols and signal words ............................................................................................. 5
2 Safety .....................................................................................................................6
2.1 Intended use ........................................................................................................................... 6
2.2 Foreseeable misuse ............................................................................................................... 6
2.3 Competent persons ................................................................................................................ 7
2.4 Disclaimer ............................................................................................................................... 7
2.5 Laser safety notices................................................................................................................8
3 Device description ..............................................................................................11
3.1 Device overview....................................................................................................................11
3.1.1 General information...........................................................................................................11
3.1.2 Performance characteristics and delivery options............................................................. 12
3.1.3 Protocol-specific characteristics ........................................................................................12
3.1.4 Accessories .......................................................................................................................12
3.1.5 Operating principle ............................................................................................................14
3.2 Connection technology ......................................................................................................... 14
3.3 Indicators and operational controls....................................................................................... 15
3.3.1 Indicators and operational controls in the control panel .................................................... 15
3.3.2 Indicators in the optics area ..............................................................................................21
3.3.3 Indicators in the connection area ......................................................................................22
4 Mounting..............................................................................................................23
4.1 Mounting instructions............................................................................................................ 23
4.2 Mounting with alignment laser and level............................................................................... 24
4.2.1 Horizontal mounting (travel axis) with the alignment laser ................................................ 24
4.2.2 Vertical mounting (lifting axis) with the alignment laser.....................................................30
4.3 Mounting without alignment laser ......................................................................................... 31
4.3.1 Horizontal mounting (travel axis) without alignment laser .................................................32
4.3.2 Vertical mounting (lifting axis) without alignment laser......................................................33
4.4 Mounting tolerances of the devices ...................................................................................... 34
4.5 Mounting distance for parallel operation of data transmission systems ............................... 35
4.6 Mounting distance for parallel operation with AMS300/AMS200 laser measurement sys-
tems ...................................................................................................................................... 37
4.7 Mounting distance for parallel operation with DDLS200 data transmission system ............ 37
4.8 Cascading (series connection) of multiple data transmission systems................................. 37
5 Electrical connection..........................................................................................40
5.1 Overview ............................................................................................................................... 40
5.2 POWER (supply voltage / switching input and switching output) ......................................... 41
5.3 BUS (bus input, EtherCAT)................................................................................................... 42
6 Starting up the device ........................................................................................43
6.1 Setting the operating mode................................................................................................... 43
6.2 Fine adjustment .................................................................................................................... 46
6.2.1 General procedure ............................................................................................................46
6.2.2 Fine adjustment with the single-handed adjustment (SHA) process................................. 47
6.2.3 Fine adjustment without the single-handed adjustment (SHA) process............................ 48

Table of contents
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 4
7 EtherCAT .............................................................................................................50
7.1 Overview ............................................................................................................................... 50
7.2 MAS EtherCAT configuration of the DDLS538…S2… ..................................................... 51
7.3 EtherCAT factory setting....................................................................................................... 52
7.3.1 Operation with EtherCAT factory setting ........................................................................... 53
7.3.2 Alternative MAS EtherCAT configuration ..........................................................................54
7.4 Control requirement .............................................................................................................. 55
7.4.1 Calculation of the control cycle time..................................................................................56
7.4.2 Control cycle times when cascading data transmission paths ..........................................57
7.4.3 Operationally related interruption of the EtherCAT communication ..................................58
7.5 Distributed Clocks................................................................................................................. 59
8 Diagnostics and troubleshooting......................................................................60
8.1 Error displays of the operating state LEDs ........................................................................... 60
8.2 Error displays and STATUS LED for remote diagnosis ........................................................ 63
8.3 Error displays of the operating mode LEDs .......................................................................... 64
8.4 Error displays of the SIGNALQUALITY display ................................................................... 64
9 Care, maintenance and disposal .......................................................................65
9.1 Cleaning................................................................................................................................ 65
9.2 Servicing ............................................................................................................................... 65
9.3 Disposing .............................................................................................................................. 65
10 Service and support ...........................................................................................66
11 Technical data .....................................................................................................67
11.1 General specifications .......................................................................................................... 67
11.1.1 Device without heater........................................................................................................67
11.1.2 Device with heating ...........................................................................................................69
11.2 Dimensioned drawings ......................................................................................................... 70
11.3 Dimensional drawings: Accessories ..................................................................................... 72
12 Order guide and accessories.............................................................................73
12.1 Nomenclature ....................................................................................................................... 73
12.2 Cables accessories............................................................................................................... 73
12.3 Other accessories................................................................................................................. 74
13 EC Declaration of Conformity............................................................................75

About this document
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 5
1 About this document
1.1 Used symbols and signal words
Tab.1.1: Warning symbols and signal words
Symbol indicating dangers to persons
Symbol indicating dangers from harmful laser radiation
Symbol indicating possible property damage
NOTE Signal word for property damage
Indicates dangers that may result in property damage if the measures for
danger avoidance are not followed.
CAUTION Signal word for minor injuries
Indicates dangers that may result in minor injury if the measures for danger
avoidance are not followed.
WARNING Signal word for serious injury
Indicates dangers that may result in severe or fatal injury if the measures
for danger avoidance are not followed.
Tab.1.2: Other symbols
Symbol for tips
Text passages with this symbol provide you with further information.
Symbol for action steps
Text passages with this symbol instruct you to perform actions.
Symbol for action results
Text passages with this symbol describe the result of the preceding action.

Safety
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 6
2 Safety
This optical data transmission system was developed, manufactured and tested in line with the applicable
safety standards. It corresponds to the state of the art.
2.1 Intended use
Devices of the DDLS500 series have been designed and developed for the optical transmission of data in
the infrared range.
Areas of application
Devices of the DDLS500 series are designed for the following areas of application:
• Data transmission between stationary and/or moving devices. The devices must – with respect to the
transmission beam spread - be positioned opposite one another without interruption. A data transmis-
sion path consists of two devices designated with "FrequencyF3" and "FrequencyF4".
• Data transmission between two mutually opposing devices, whereby each device can rotate 360°. The
middle axes of the receiver lenses must – with respect to the transmission beam spread – be posi-
tioned opposite one another without interruption during the rotation.
For rotary transmission, a minimum distance of 500mm is necessary between the two devices.
NOTICE
For information about possible restrictions regarding the transmission of special protocols see
chapter 3.1.2 "Performance characteristics and delivery options".
CAUTION
Observe intended use!
The protection of personnel and the device cannot be guaranteed if the device is operated in a
manner not complying with its intended use.
ÄOnly operate the device in accordance with its intended use.
ÄLeuzeelectronicGmbH+Co.KG is not liable for damages caused by improper use.
ÄRead these operating instructions before commissioning the device. Knowledge of the
operating instructions is an element of proper use.
NOTICE
Comply with conditions and regulations!
ÄObserve the locally applicable legal regulations and the rules of the employer's liability
insurance association.
2.2 Foreseeable misuse
Any use other than that defined under "Intended use" or which goes beyond that use is considered im-
proper use.
In particular, use of the device is not permitted in the following cases:
• in rooms with explosive atmospheres
• for medical purposes
NOTICE
Do not modify or otherwise interfere with the device!
ÄDo not carry out modifications or otherwise interfere with the device. The device must not be
tampered with and must not be changed in any way.
ÄThe device must not be opened. There are no user-serviceable parts inside.
ÄRepairs must only be performed by Leuze electronic GmbH + Co. KG.

Safety
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 7
WARNING
MAS EtherCAT configuration activated on slave side!
If the MAS EtherCAT configuration is incorrectly activated on the slave side, it may result in an
overflow of the Lost Frames counter of the EtherCAT control.
With the overflow of the Lost Frames counter, all network communication on the EtherCAT
master side is deactivated.
ÄAll sensors and actuators that are operated on the affected EtherCAT master can no longer
be controlled.
ÄIn the case of moving machine or system parts, an emergency stop can result in property
damage and personal injury.
ÄLeuzeelectronicGmbH+Co.KG accepts no liability if the installation and mounting regula-
tions are not observed.
NOTICE
If the MAS EtherCAT configuration is incorrectly activated on the slave side, it may result in an
overflow of the Lost Frames counter, particularly in the following cases:
ÄThe supply voltage of the device on the master side and/or on the slave side is switched off.
ÄThe EtherCAT link of the participants directly connected to the devices is interrupted.
ÄThe optical link between the data transmission devices is interrupted.
In automatic operation, interruption of the optical link can result from incorrect alignment of
the two devices with respect to one another.
2.3 Competent persons
Connection, mounting, commissioning and adjustment of the device must only be carried out by competent
persons.
Prerequisites for competent persons:
• They have a suitable technical education.
• They are familiar with the rules and regulations for occupational safety and safety at work.
• They are familiar with the operating instructions for the device.
• They have been instructed by the responsible person on the mounting and operation of the device.
Certified electricians
Electrical work must be carried out by a certified electrician.
Due to their technical training, knowledge and experience as well as their familiarity with relevant standards
and regulations, certified electricians are able to perform work on electrical systems and independently de-
tect possible dangers.
In Germany, certified electricians must fulfill the requirements of accident-prevention regulations DGUV
(German Social Accident Insurance) provision 3 (e.g. electrician foreman). In other countries, there are re-
spective regulations that must be observed.
2.4 Disclaimer
LeuzeelectronicGmbH+Co.KG is not liable in the following cases:
• The device is not being used properly.
• Reasonably foreseeable misuse is not taken into account.
• Mounting and electrical connection are not properly performed.
• Changes (e.g., constructional) are made to the device.

Safety
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 8
2.5 Laser safety notices
Laser diode of the transmitter – laser class 1M
ATTENTION
INVISIBLE LASER RADIATION – CLASS 1M LASER PRODUCT
Do not expose users of telescopic optics!
The device satisfies the requirements of IEC/EN60825-1:2014 safety regulations for a product
of laser class1M and complies with 21 CFR 1040.10 except for conformance with IEC 60825-1
Ed. 3., as described in Laser Notice No. 56, dated May 8, 2019.
ÄLooking into the beam path for extended periods using telescope optics may damage the
eye's retina. Never look using telescope optics into the laser beam or in the direction of re-
flecting beams.
ÄCAUTION! Use of controls or adjustments or performance of procedures other than speci-
fied herein may result in hazardous light exposure.
The use of optical instruments or devices (e.g., magnifying glasses, binoculars) with the
product will increase eye danger.
ÄObserve the applicable statutory and local laser protection regulations.
ÄThe device must not be tampered with and must not be changed in any way.
There are no user-serviceable parts inside the device.
Repairs must only be performed by Leuze electronic GmbH + Co. KG.
The device emits invisible laser radiation with a wavelength of 785nm (device with designation
"FrequencyF3") or 852nm (device with designation "FrequencyF4") through the laser aperture of the
optical window. The beam spread of the beam cone is ≤1° (± 0.5°).
The power density distribution in the light spot is homogeneous; there is no elevation of power density in
the center of the light spot. The average emitted laser power of the device is <12mW. For transmission of
the data, the emitted laser radiation is amplitude modulated (on-off keying). Pulses and pulse pauses of the
emitted laser light are between 8ns and 32ns long. The laser power emitted during the pulses is <24mW.
1
2
3
1 Laser aperture – alignment laser
2 Laser aperture – transmitter
3 Laser warning sign
Fig.2.1: Laser apertures

Safety
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 9
UNSICHTBARE LASERSTRAHLUNG
Nicht direkt mit Teleskopoptiken betrachten!
LASER KLASSE 1M
EN 60825-1:2014
Max. Leistung (peak):
Impulsdauer:
Wellenlänge:
RADIAZIONE LASER INVISIBILE
Non guardare direttamente con ottiche telescopiche!
APARRECCHIO LASER DI CLASSE 1M
EN 60825-1:2014
Potenza max. (peak):
Durata dell'impulso:
Lunghezza d'onda:
< 36 mW
32
n s
785 nm
< 36 mW
32 n s
785 nm
INVISIBLE LASER RADIATION
Do not expose users of telescopic optics!
CLASS 1M LASER PRODUCT
EN 60825-1:2014
Maximum Output (peak):
Pulse duration:
Wavelength:
RAYONNEMENT LASER INVISIBLE
Ne pas regarder directement avec des optiques télescopiques !
APPAREIL À LASER DE CLASSE 1M
EN 60825-1:2014
Puissance max. (crête):
Durée d`impulse:
Longueur d`ande émis:
< 36 mW
32 n s
785 nm
< 36 mW
32 n s
785 nm
RADIACIÓN LÁSER INVISIBLE
¡No mirar directamente con ópticas telescópicas!
PRODUCTO LÁSER DE CLASE 1M
EN 60825-1:2014
Potencia máx. (peak):
Duración del impulso:
Longitud de onda:
RADIACAO LASER INVISIVEL
Não olhe diretamente para as óticas telescópicas!
EQUIPAMENTO LASER CLASSE 1M
EN 60825-1:2014
Potência máx. (peak):
Período de pulso:
Comprimento de onda:
< 36 mW
32 n s
785 nm
< 36 mW
32 n s
785 nm
INVISIBLE LASER RADIATION
Do not expose users of telescopic optics!
CLASS 1M LASER PRODUCT
IEC 60825-1:2014
Complies with 21 CFR 1040.10
Maximum Output (avg):
Pulse duration:
Wavelength: ⺞㉒匘䧋䦚ₜⒿ䤓䉏⏘⺓兎䰐㷱抩扖㦪扫柫屑䦚᧝1M伊䉏⏘ℶ❐IEC 60825-1:2014
㦏⮶戢⒉᧤⽿⋋᧥厘⑁㖐兼㢅梃㽱栎< 36 mW
32
n s
785 nm
< 36 mW
32 n s
785 nm
Fig.2.2: Laser information signs for devices with frequencyF3

Safety
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 10
UNSICHTBARE LASERSTRAHLUNG
Nicht direkt mit Teleskopoptiken betrachten!
LASER KLASSE 1M
EN 60825-1:2014
Max. Leistung (peak):
Impulsdauer:
Wellenlänge:
RADIAZIONE LASER INVISIBILE
Non guardare direttamente con ottiche telescopiche!
APARRECCHIO LASER DI CLASSE 1M
EN 60825-1:2014
Potenza max. (peak):
Durata dell'impulso:
Lunghezza d'onda:
< 36 mW
32
n s
852 nm
< 36 mW
32 n s
852 nm
INVISIBLE LASER RADIATION
Do not expose users of telescopic optics!
CLASS 1M LASER PRODUCT
EN 60825-1:2014
Maximum Output (peak):
Pulse duration:
Wavelength:
RAYONNEMENT LASER INVISIBLE
Ne pas regarder directement avec des optiques télescopiques !
APPAREIL À LASER DE CLASSE 1M
EN 60825-1:2014
Puissance max. (crête):
Durée d`impulse:
Longueur d`ande émis:
< 36 mW
32 n s
852 nm
< 36 mW
32 n s
852 nm
RADIACIÓN LÁSER INVISIBLE
¡No mirar directamente con ópticas telescópicas!
PRODUCTO LÁSER DE CLASE 1M
EN 60825-1:2014
Potencia máx. (peak):
Duración del impulso:
Longitud de onda:
RADIACAO LASER INVISIVEL
Não olhe diretamente para as óticas telescópicas!
EQUIPAMENTO LASER CLASSE 1M
EN 60825-1:2014
Potência máx. (peak):
Período de pulso:
Comprimento de onda:
< 36 mW
32 n s
852 nm
< 36 mW
32 n s
852 nm
INVISIBLE LASER RADIATION
Do not expose users of telescopic optics!
CLASS 1M LASER PRODUCT
IEC 60825-1:2014
Complies with 21 CFR 1040.10
Maximum Output (avg):
Pulse duration:
Wavelength: ⺞㉒匘䧋䦚ₜⒿ䤓䉏⏘⺓兎䰐㷱抩扖㦪扫柫屑䦚᧝1M伊䉏⏘ℶ❐IEC 60825-1:2014
㦏⮶戢⒉᧤⽿⋋᧥厘⑁㖐兼㢅梃㽱栎< 36 mW
32
n s
852 nm
< 36 mW
32 n s
852 nm
Fig.2.3: Laser information signs for devices with frequencyF4
Alignment laser (optional) – laser class 1
ATTENTION
LASER RADIATION – CLASS 1 LASER PRODUCT
The device satisfies the requirements of IEC/EN60825-1:2014 safety regulations for a product
of laser class1 and complies with 21 CFR 1040.10 and 1040.11 except for conformance with
IEC 60825-1 Ed. 3., as described in Laser Notice No. 56, dated May 8, 2019.
CAUTION: Opening the device can lead to dangerous exposure to radiation.
ÄObserve the applicable statutory and local laser protection regulations.
ÄThe device must not be tampered with and must not be changed in any way.
There are no user-serviceable parts inside the device.
Repairs must only be performed by LeuzeelectronicGmbH+Co.KG.
NOTICE
Devices with integrated alignment laser can be identified by part number code L in the part des-
ignation, e.g., DDLS5xxXXX.4L.
Laser class1M also applies for devices with integrated alignment laser.

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 11
3 Device description
3.1 Device overview
3.1.1 General information
The DDLS538…S2… optical data transmission system transmits EtherCAT data transparently and with-
out contact or wear via infrared light.
A MAC address or node configuration is not necessary.
A transmission path consists of two mutually opposing devices.
• One device is designated with "FrequencyF3", the other with "FrequencyF4".
• The devices can also be assigned via part number codes DDLS538…3S2… and
DDLS538…4S2…, respectively.
14
3
4
5
13
6
72
8
10
1
11
916
15
12
1 Device housing 9 Connection area
2 Mounting plate 10 Operating mode selector switch
3 Planar surface for supporting a bubble level or
alignment straightedge
11 Alignment screw for vertical alignment
4 Receiver optics 12 Alignment screw for horizontal alignment
5 Transmitter optics 13 STATUS LED for remote diagnostics
6 Alignment laser for mounting support (optional) 14 Supporting edge for bubble level or alignment straight-
edge
7 LED indicators in the control panel 15 EtherCAT connection, M12
8 Spirit level (for devices with alignment laser) 16 POWER connection, M12
Fig.3.1: Device construction

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 12
3.1.2 Performance characteristics and delivery options
• Data transmission over a range of up to 200m
• Optional alignment laser including spirit level for mounting support
• Planar surfaces on top and side for supporting a level or alignment straightedge
• Single-handed adjustment (SHA) for aligning the devices by one person
• Optional variants with integrated heating for operating temperatures to -35°C
3.1.3 Protocol-specific characteristics
Protocol-independent data transmission of all EtherCAT protocols, e.g.
• EoE: Ethernet over EtherCAT
• CoE: CANopen over EtherCAT
• FoE: File access over EtherCAT
• AoE: ADS over EtherCAT
• EAP: EtherCAT Automation Protocol
• SoE: Servo drive profile over EtherCAT
• FSoE: Fail Safe over EtherCAT
Transmission of safety protocols
The DDLS538 is suitable for transmitting the following safety protocols:
• Safety-over-EtherCAT (FSoE)
NOTICE
Connection interruption of the optical data transmission
The following causes result in a connection interruption of the optical data transmission:
- The interruption of the optical link (light beam interruption)
- Excess glare on the receiver optics from external ambient light
- Light from other optical sensors shining onto the the receiver optics with a wavelength of ap-
prox. 785nm or 852nm
- The shutting off of the voltage supply on the DDLS538
- The interruption of the copper LAN connection from and to the optical data transceiver
- Device defects
A connection interruption, especially with respect to safety protocols, must be taken into account
in the safety concept of the system by the system manufacturer.
The system must be brought to a safe state by the system manufacturer. While doing so, people
must not be exposed to a danger at any time. The system manufacturer is responsible for safely
bringing the system to a standstill.
If the causes of a connection interruption on the DDLS538 mentioned above are rectified, it will
reestablish the optical data transmission without any further acknowledgment measures.
If special measures must be taken to restart the system after correcting the interruption of data
transmission, these are to be defined by the system manufacturer and implemented in the sys-
tem’s safety concept.
NOTICE
The decision as to whether the DDLS538 can be used for other protocols that do not corre-
spond to the protocol and transmission characteristics described above lies with the user. Leuze
electronic GmbH + Co. KG cannot accept any liability for any transmission problems that occur
which are attributable to the above-mentioned causes.
3.1.4 Accessories
For exact details and order information, see chapter 12 "Order guide and accessories".
• Adapter plate for installing instead of a DDLS200
• Ready-made cable for M12 connections

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 13
• Customizable connector plug

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 14
3.1.5 Operating principle
A pair of devices is necessary for establishing a data transmission path. To prevent the devices from mutu-
ally interfering with one another during data transmission, they use different frequencies.
• one device with frequency F3
Part designation: DDLS538xxx.3S2xx
Designation on the name plate: FrequencyF3
• one device with frequency F4
Part designation: DDLS538xxx.4S2xx
Designation on the name plate: FrequencyF4
NOTICE
Installation for devices with an operating range of 200m.
ÄAlways install the Frequency F4 device as stationary device for devices with an operating
range of 200m (DDLS538200…).
12
34
1 Device with frequency F3 (DDLS538xxx.3S2xx)
2 Device with frequency F4 (DDLS538xxx.4S2xx)
3 FrequencyF3
4 FrequencyF4
Fig.3.2: Optical data transmission on two frequencies
The received signal level (SIGNALQUALITY) is measured on both devices. If the received signal level
drops below a certain value (SIGNALQUALITY indicator shows only red and orange), the intensity warning
is activated.
The intensity warning is applied on switching output IO1 of the POWER connection.
3.2 Connection technology
A-coded, M12 connection for the supply voltage with integrated switching input and output.
D-coded, M12 connection for the EtherCAT connection.

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 15
3.3 Indicators and operational controls
3.3.1 Indicators and operational controls in the control panel
Operating mode selector switch and operating mode indicator
• Operating mode selector switch [MODE]
The operating mode selector switch is used to switch between the operating modes of the device (see
chapter 6 "Starting up the device").
• Operating mode LEDs AUT, MAN, ADJ, LAS, LLC
• MAS configuration LED
Operating mode LEDs and the configuration LED indicate the active operating mode.
4 5
12 73
6
1 AUT – Automatic
2 MAN – Manual
3 ADJ – Adjust
4 LAS – Alignment laser for mounting support
5 LLC – LinkLossCounter
6 MAS – DDLS538…S2… installed on the master side
7 MODE – Operating mode selector switch
Fig.3.3: Operating mode LEDs, configuration LED, and operating mode selector switch

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 16
Tab.3.1: Meaning of the operating mode indicators
LED Color State Description
AUT Green Continuous light AUT operating mode (Automatic) active
Standard operating mode for data transmission
Note:
The optical link remains activated until the last orange LED
in the SIGNALQUALITY indicator switches off.
MAN Green Continuous light MAN operating mode (Manual) active
Operating mode for fine adjustment of the devices via SHA
(see chapter 6.2.2 "Fine adjustment with the single-handed
adjustment (SHA) process").
Note:
The optical link remains activated until the last green LED in
the SIGNALQUALITY indicator switches off.
ADJ Green Continuous light ADJ operating mode (Adjust) active
Operating mode for fine adjustment of the devices via SHA
(see chapter 6.2.2 "Fine adjustment with the single-handed
adjustment (SHA) process").
Note:
• Data transmission to the connected participants is de-
activated.
• The optical link remains activated until the last orange
LED in the SIGNALQUALITY indicator switches off.
• The received signal level (SIGNALQUALITY) of the
second device is transmitted to the SIGNALQUALITY
indicator of the first device.
LAS Green Continuous light LAS operating mode (Laser Adjustment System) active
The alignment laser mounting support is activated (see
chapter 4.2 "Mounting with alignment laser and level").
LLC --- OFF LLC operating mode (LinkLossCounter, interruption diag-
nostics) not activated.
Green Continuous light The optical link was interruption-free since activation of the
LLC.
Red Continuous light The optical link was interrupted at least once since activa-
tion of the LLC (see chapter 8.3 "Error displays of the oper-
ating mode LEDs").
MAS The MAS configuration defines whether the
DDLS538…S2… is installed on the side facing the mas-
ter or the slave (see chapter 7 "EtherCAT").
Note: For master-side installation, the MAS configuration
must be activated on the device.
For slave-side installation, the MAS configuration must be
deactivated on the device.
--- OFF DDLS538…S2… installed on the slave side.
Green Continuous light DDLS538…S2… installed on the master side.

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 17
Operating state indicator
The PWR, TMP, LSR, MAS, OLK, ERL and LINK LEDs indicate the operating state of the device.
12 3 4 5 6 7
1 PWR – Supply voltage (Power)
2 TMP – Temperature warning/error
3 LSR – Laser prefailure message
4 MAS – Master-side installation of the DDLS538…S2…
5 OLK – Optical link
6 ERL – Error Link
7 LINK – M12 cable-connected link
Fig.3.4: Operating state LEDs in the control panel
Tab.3.2: Meaning of the operating state indicators
LED Color State Description
PWR --- OFF No supply voltage (see chapter 8.1 "Error displays of the op-
erating state LEDs")
Green Flashing Device is being initialized
• Supply voltage connected
• Initialization running
• No data sent or received
Green Continuous light Data transmission path ready
• Initialization finished
Red Flashing Warning set (see chapter 8.1 "Error displays of the operating
state LEDs")
• No green and orange LEDs in SIGNALQUALITY indica-
tor
• The optical link is interrupted.
• The laser diode of the transmitter is defective.
Red Continuous light Device error (see chapter 8.1 "Error displays of the operating
state LEDs"
• The function of the device is limited.
The displays of the other operating state LEDs may pro-
vide information on the cause of the error.

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 18
LED Color State Description
TMP --- OFF Operating temperature in the specified working range
Orange Continuous light • Warning: The operating temperature is above or below
the specified working range by a maximum of 5°C (see
chapter 8.1 "Error displays of the operating state LEDs").
• Data transmission remains active.
Red Continuous light • The operating temperature is above or below the speci-
fied working range by more than 5°C (see chapter 8.1
"Error displays of the operating state LEDs").
• The operating time outside of the permissible operating
temperature is detected by the device.
• Data transmission remains active.
LSR --- OFF Laser diode of the transmitter with sufficient function reserve.
Orange Continuous light • Warning: The laser diode of the transmitter signals the
imminent end of the life expectancy (see chapter 8.1 "Er-
ror displays of the operating state LEDs").
Limits to the maximum data transmission distance may
occur.
• Data transmission remains active.
Orange Flashing • Laser monitoring has detected an excessively high laser
transmitting current.
• The transmitter was deactivated.
MAS The MAS configuration defines whether the
DDLS538…S2… is installed on the side facing the master
or the slave (see chapter 7 "EtherCAT").
Note: For master-side installation, the MAS configuration
must be activated on the device.
For slave-side installation, the MAS configuration must be de-
activated on the device.
--- OFF DDLS538…S2… installed on the slave side.
Green Continuous light DDLS538…S2… installed on the master side.
OLK --- OFF No optical data connection
No data transmission
Causes (see chapter 8.1 "Error displays of the operating state
LEDs"):
• Optical window soiled
• Insufficient alignment
• Range exceeded
• Environmental influences (snow, rain, fog)
• Wrong F3/F4 frequency assignment of the devices
• Transmitter deactivated
• Transmitter of the second device deactivated
Green Continuous light • The optical link exists.
• No data is sent or received.
Orange Continuous light/
flickering light
Data is sent and received.

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 19
LED Color State Description
ERL --- OFF No link error.
Orange Continuous light • Missing link (Ethernet cable connection) on the second
device (see chapter 8.1 "Error displays of the operating
state LEDs").
• SIGNALQUALITY indicator on the second device without
green and orange LED (see chapter 8.1 "Error displays of
the operating state LEDs").
Red Continuous light • No cable-connected link to the connected device (see
chapter 8.1 "Error displays of the operating state LEDs").
• SIGNALQUALITY indicator without green and orange
LED (see chapter 8.1 "Error displays of the operating
state LEDs").
LINK --- OFF No cable-connected link to the connected device (see chapter
8.1 "Error displays of the operating state LEDs").
Green Continuous light • The link to the connected device is OK.
• No data is sent or received.
Orange Continuous light/
flickering light
• The link to the connected device is active.
• Data is sent and received.
SIGNALQUALITY indicator
Eight individual LEDs are available for displaying the received signal level (SIGNALQUALITY):
• two red LEDs
• two orange LEDs
• four green LEDs
At the optimum received signal level, all LEDs (red, orange, green) are activated.
If the received signal level drops, the LEDs are successively switched off, beginning with the green LEDs.
12 3
1 two red LEDs
2 two orange LEDs
3 four green LEDs
Fig.3.5: SIGNALQUALITY indicator of the received signal level

Device description
Leuze electronic GmbH + Co. KG DDLS 538 ... S2 ... 20
Tab.3.3: Meaning of the SIGNALQUALITY indicators
LED Color State Description
SIGNAL
QUALITY
Green Continuous light
4-stage
• Received signal level with function reserve.
• The optical link exists.
Orange Continuous light
2-stage
Warning: Received signal level with minimal function re-
serve (see chapter 8 "Diagnostics and troubleshooting").
• The optical link exists.
AUT operating mode (Automatic): Data transmission is
active.
MAN (Manual), ADJ (Adjust) operating modes: Data
transmission is deactivated.
• Switching output IO1 of the POWER connection is acti-
vated in operating modes AUT (Automatic), MAN (Man-
ual) and ADJ (Adjust).
Causes:
• Optical window soiled
• Range exceeded
• Environmental influences (snow, rain, fog)
• Insufficient alignment
Red Continuous light
2-stage
The optical link is interrupted. The received signal level is
not sufficient (see chapter 8 "Diagnostics and troubleshoot-
ing").
• No data is sent or received.
• Switching output IO1 of the POWER connection is acti-
vated.
Causes:
• Optical window soiled
• Range exceeded
• Environmental influences (snow, rain, fog)
• Insufficient alignment of the devices
• Wrong F3/F4 frequency assignment of the devices
• Transmitter of the second device deactivated
OFF MAS EtherCAT configuration is activated on both devices.
or
MAS EtherCAT configuration is deactivated on both de-
vices.