Leuze electronic DDLS 200 Parts list manual

DDLS 200
Bus-Capable Optical Data Transmission
en 03-2010/04 50036440
TECHNICAL DESCRIPTION

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Table of contents
Leuze electronic DDLS 200 1
TNT 35/7-24V
1 General Information........................................................................................... 4
1.1 Explanation of symbols ........................................................................................................ 4
1.2 Declaration of conformity ..................................................................................................... 4
1.3 Short description .................................................................................................................. 4
1.4 Operating principle ............................................................................................................... 5
2 Safety Notices.................................................................................................... 6
2.1 Safety standards .................................................................................................................. 6
2.2 Intended use ........................................................................................................................ 6
2.3 Working safely ..................................................................................................................... 6
2.4 Organizational measures ..................................................................................................... 7
3 Technical Data ................................................................................................... 8
3.1 General technical data ......................................................................................................... 8
3.2 Dimensioned drawings....................................................................................................... 10
4 Mounting / Installation (all device models).................................................... 11
4.1 Mounting and alignment..................................................................................................... 11
4.2 Arrangement of adjacent transmission systems ................................................................ 12
4.3 Cascading (series connection) of several DDLS 200 data paths....................................... 14
4.4 Electrical connection .......................................................................................................... 16
4.4.1 Electrical connection - devices with screwed cable glands and terminals................................... 16
4.4.2 Electrical connection - devices with M12 connectors .................................................................. 19
5 PROFIBUS / RS 485 ......................................................................................... 21
5.1 PROFIBUS connection - devices with screwed cable glands and terminals ..................... 21
5.1.1 Converting the PROFIBUS model with terminals to M12 connectors ......................................... 22
5.2 PROFIBUS connection - devices with M12 connectors..................................................... 23
5.3 Device configuration PROFIBUS ....................................................................................... 24
5.4 LED Indicators PROFIBUS ................................................................................................ 25
6 INTERBUS 500kbit/s / RS 422......................................................................... 26
6.1 Electrical connection INTERBUS 500kbit/s ....................................................................... 26
6.2 Device configuration INTERBUS 500kbit/s / RS 422......................................................... 27
6.3 LED indicators INTERBUS 500kbit/s / RS 422.................................................................. 28
7 INTERBUS 2Mbit/s Fiber-Optic Cable............................................................ 29
7.1 Fiber-optic-cable connection INTERBUS 2Mbit/s.............................................................. 29
7.2 Device configuration INTERBUS 2Mbit/s FOC.................................................................. 30
7.3 LED indicators INTERBUS 2Mbit/s fiber-optic cable ......................................................... 31

Table of contents
2 DDLS 200 Leuze electronic
8 Data Highway + (DH+) / Remote I/O (RIO)...................................................... 32
8.1 Electrical connection DH+ / RIO ........................................................................................ 32
8.2 Device configuration DH+ / RIO......................................................................................... 33
8.3 LED indicators DH+ / RIO .................................................................................................. 34
9 DeviceNet / CANopen...................................................................................... 35
9.1 Electrical connection DeviceNet / CANopen - screwed cable glands/terminals ................ 35
9.1.1 Bus transceiver and device supplied via separate power connection..........................................36
9.1.2 Bus transceiver supplied via bus cable, device supplied via separate power line .......................36
9.1.3 Bus transceiver and device supplied via bus cable......................................................................37
9.1.4 Installation and connection of the optional M12 connectors ........................................................38
9.2 DeviceNet/CANopen electrical connection- M 12 connectors ........................................... 39
9.3 Device configuration DeviceNet / CANopen ...................................................................... 41
9.3.1 Baud rate conversion ...................................................................................................................41
9.3.2 Sorting (switch S4.1) ....................................................................................................................41
9.3.3 Bus lengths as a function of the baud rate...................................................................................41
9.4 Wiring................................................................................................................................. 42
9.4.1 Termination ..................................................................................................................................43
9.5 DeviceNet/CANopen LED indicators ................................................................................. 44
9.6 Interruption of the data transmission path.......................................................................... 45
9.7 Important notices for system integrators............................................................................ 46
9.7.1 Schematic drawing of the inner construction................................................................................47
9.7.2 Timing ..........................................................................................................................................48
9.7.3 Synchronous messages...............................................................................................................49
9.7.4 Other implementation notes .........................................................................................................49
10 Ethernet............................................................................................................ 50
10.1 Ethernet connection - devices with screwed cable glands and terminals .......................... 50
10.2 Ethernet connection - devices with M12 connectors ......................................................... 51
10.3 Device configuration Ethernet............................................................................................ 52
10.3.1 Autonegotiation (Nway)................................................................................................................52
10.3.2 Transmission rate conversion ......................................................................................................52
10.3.3 Network expansion.......................................................................................................................52
10.4 Wiring................................................................................................................................. 53
10.4.1 Assignment of the RJ45 and M12 Ethernet cables......................................................................54
10.4.2 Installing cable with RJ45 connector............................................................................................55
10.5 LED Indicators Ethernet.....................................................................................................56
10.6 Important notices for system integrators............................................................................ 56
10.6.1 Typical bus configuration .............................................................................................................57
10.6.2 Timing ..........................................................................................................................................58

Table of contents
Leuze electronic DDLS 200 3
TNT 35/7-24V
11 Commissioning / Operation (all device models)........................................... 60
11.1 Indicator and operating elements....................................................................................... 60
11.2 Operating modes ............................................................................................................... 61
11.3 Initial commissioning .......................................................................................................... 62
11.3.1 Switch on device / function check................................................................................................ 62
11.3.2 Fine adjustment ........................................................................................................................... 62
11.4 Operation ........................................................................................................................... 63
12 Maintenance..................................................................................................... 64
12.1 Cleaning............................................................................................................................. 64
13 Diagnostics and Troubleshooting.................................................................. 65
13.1 Status display on the device .............................................................................................. 65
13.2 Diagnostic mode ................................................................................................................ 65
13.3 Troubleshooting ................................................................................................................. 66
14 Accessories...................................................................................................... 67
14.1 Accessory terminating resistors ......................................................................................... 67
14.2 Accessory connectors........................................................................................................67
14.3 Accessory ready-made cables for voltage supply.............................................................. 67
14.3.1 Contact assignment of PWR IN connection cable for voltage supply..........................................67
14.3.2 Technical data of PWR IN connection cable for voltage supply .................................................. 67
14.3.3 Order codes of PWR IN connection cable for voltage supply......................................................67
14.4 Accessory ready-made cables for interface connection..................................................... 68
14.4.1 General ........................................................................................................................................ 68
14.4.2 Contact assignment for PROFIBUS connection cable KB PB… ................................................. 68
14.4.3 Technical data for PROFIBUS connection cable KB PB….......................................................... 69
14.4.4 Order codes for M12 PROFIBUS connection cables KB PB… ................................................... 69
14.4.5 Contact assignment for M12 Ethernet connection cable KB ET… .............................................. 70
14.4.6 Technical data for M12 Ethernet connection cable KB ET… ...................................................... 70
14.4.7 Order codes for M12 Ethernet connection cables KB ET… ........................................................71

General Information
4 DDLS 200 Leuze electronic
1 General Information
1.1 Explanation of symbols
The symbols used in this operating manual are explained below.
1.2 Declaration of conformity
The optical DDLS 200 data transmission system was designed and manufactured in accordance with
applicable European normatives and guidelines.
The manufacturer of the product, Leuze electronic GmbH + Co KG in D-73277 Owen/Teck, possesses
a certified quality assurance system in accordance with ISO 9001.
The declaration of conformity can be requested from the manufacturer.
1.3 Short description
Where data have to be transmitted to and from moving objects, optical data transmission systems pro-
vide an ideal solution.
With the DDLS 200 Series, Leuze electronic offers optical, high-performance data transmission sys-
tems. The data transmission units are robust and are not subject to wear.
A DDLS 200 data transmission system consists of a set of two transmission and reception units: e.g.
DDLS 200/200.1-10 and DDLS 200/200.2-10.
Attention!
Pay attention to passages marked with this symbol. Failure to heed this information can lead
to injuries to personnel or damage to the equipment.
Attention Laser!
This symbol warns of possible danger through hazardous laser radiation.
Note!
This symbol indicates text passages containing important information.
UL
US
C
LISTED

General Information
Leuze electronic DDLS 200 5
TNT 35/7-24V
Features of the DDLS 200
The fact that bus systems are found in nearly all areas of industry places high demands on data trans-
mission systems. The DDLS 200 fulfills these requirements, particularly with regard to:
• Transmission safety
• Minimum transmission times (real-time capable)
• Deterministic transmission
The DDLS 200 data transmission system, which is available in several model variations, makes pos-
sible the contact-free transmission of the following bus protocols:
• PROFIBUS FMS, DP, MPI, FMS - DP mixed-operation, up to max. 1.5Mbit/s, PROFISAFE
• INTERBUS 500kbit/s, RS 422 general, copper cable
• INTERBUS 2Mbit/s / 500kbit/s, fiber-optic cable
• Data Highway + (DH+) from Rockwell Automation (Allen Bradley)
• Remote I/O (RIO) from Rockwell Automation (Allen Bradley)
• DeviceNet
• CANopen
• Ethernet for all protocols based on TCP/IP or UDP
Other bus systems on request.
1.4 Operating principle
To prevent the devices from mutually interfering with one another during data transmission in duplex
operation, they use two different frequency pairs. These are indicated by the type designation ….1
and ….2 as well as the label frequency f1and frequency f2on the control panel.
Figure 1.1:Operating principle
The receiving level is checked at both devices and can be read on a bar graph LED indicator. If the
receiving level drops below a certain value, e.g. due to increased soiling of the optics, a warning output
is activated.
All work on the device (mounting, connecting, aligning, indicator/operating elements) is performed
comfortably on the front side.
f
1
f
2
DDLS 200/XXX.1-YY DDLS 200/XXX.2-YY
Optical data transmission on
two frequencies

Safety Notices
6 DDLS 200 Leuze electronic
2 Safety Notices
2.1 Safety standards
The optical DDLS 200 data transmission system was developed, manufactured and tested in accor-
dance with applicable safety standards. It corresponds to the state of the art. The device series
DDLS 200 is "UL LISTED" according to U.S. American and Canadian safety standards, and fulfills the
requirements of Underwriter Laboratories Inc. (UL).
2.2 Intended use
The DDLS 200 optical data transmission system has been designed and developed for the optical
transmission of data in the infrared range.
Areas of application
The DDLS 200 is suitable for the following areas of application:
• Automated high-bay warehouses
• Stationary data transmission between buildings
• Anywhere, where data transmission to and from stationary or moving objects (visual contact) over
relatively long distances (up to 500m) is required.
• Rotary transmission
2.3 Working safely
Attention!
The protection of personnel and the device cannot be guaranteed if the device is operated
in a manner not corresponding to its intended use.
Attention: Artificial optical radiation!
The DDLS 200 data transmission system uses an infrared diode and is a device of LED
Class 1 according to EN 60825-1.
When used under reasonable conditions, devices of LED Class 1 are safe. This even in-
cludes the use of optical instruments used for the direct observation of the laser beam.
For the operation of the data transmission system with artificial optical radiation, we refer to
directive 2006/25/EC or its implementation in the respective national legislation and to the
applicable parts of EN 60825.
Attention!
Interventions and changes to the device, except where expressly described in this operating
manual, are not authorized.

Safety Notices
Leuze electronic DDLS 200 7
TNT 35/7-24V
2.4 Organizational measures
Documentation
All entries in this operating manual must be heeded, in particular those in the sections "Safety Notices"
and "Commissioning". Keep this technical description in a safe place. It should be accessible at all
times.
Safety regulations
Observe the locally applicable legal regulations and the rules of the employers' liability insurance as-
sociation.
Qualified personnel
Mounting, commissioning and maintenance of the device may only be carried out by qualified person-
nel.
Work on electrical installations may only be carried out by qualified electricians.
Repair
Repairs must only be carried out by the manufacturer or an authorized representative.

Technical Data
8 DDLS 200 Leuze electronic
3 Technical Data
3.1 General technical data
Electrical data
Supply voltage Vin 18 … 30VDC
Current consumption
without optics heating
approx. 200mA with 24VDC (no load at switching output)
Current consumption
with optics heating
approx. 800mA with 24VDC (no load at switching output)
Optical data
Sensing distance 0.2 … 30m (DDLS 200/30…)
0.2 … 80m (DDLS 200/80…)
0.2 … 120m (DDLS 200/120…)
0.2 … 200m (DDLS 200/200…)
0.2 … 300m (DDLS 200/300…)
0.2 … 500m (DDLS 200/500…)
Transmission diode infrared light, wavelength 880nm
Opening angle ± 0.5° with respect to the optical axis for 120m … 500m models,
± 1.0° with respect to the optical axis for 80m models,
± 1.5° with respect to the optical axis for 30m models
Ambient light > 10000 Lux according to EN 60947-5-2:2008
LED class 1 acc. to EN 60825-1
Input/output
Input 0 … 2VDC: transmitter/receiver deactivated
18 … 30VDC: transmitter/receiver activated
Output 0 … 2VDC: normal operation
Vin - 2VDC: limited performance reserve
output current max. 100mA, short-circuit proof, protected against
surge voltage, transients and overheating
Operating and display elements
Membrane buttons change the operating mode
Individual LEDs indicate voltage supply, operating mode, data traffic (depends on
the model)
LED strip bar graph display of the receiving level
Mechanical data
Housing aluminum diecast; light inlet/outlet, glass
Weight approx. 1200g
Protection class IP 65 acc. to EN 60529:2000

Technical Data
Leuze electronic DDLS 200 9
TNT 35/7-24V
Environmental conditions
Operating temperature -5°C … +50°C without optics heating
-30°C … +50°C with optics heating (non-condensing)
Storage temperature -30°C … +70°C
Air humidity max. 90% rel. humidity, non-condensing
Vibrations acc. to EN 60068-2-6:1996
Noise acc. to EN 60068-2-64:2009
Shock acc. to EN 60068-2-27:1995 and EN 60068-2-29:1995
EMC*1
*1 Warning: This is a Class A product. In a domestic environment this product may cause radio interfer-
ence, in which case the operator may be required to take adequate measures.
EN 61000-6-2:2006 and EN 61000-6-4:2007
UL LISTED acc. to UL 60950 and CSA C22.2 No. 60950

Technical Data
10 DDLS 200 Leuze electronic
3.2 Dimensioned drawings
Figure 3.1:Dimensioned drawing DDLS 200
AControl panel
BTransmission optics
CReception optics
DOptical axis
Permissible cables:
• M16 x 1.5:
round cable Ø 5 … 10 mm
• M20 x 1.5:
round cable Ø 7 … 12 mm
• M25 x 1.5:
round cable Ø 4.5 … 9 mm
DDLS 200 / … - 10 …
DDLS 200 / … - 20 …
DDLS 200 / … - 40 …
DDLS 200 / … - 50 …
DDLS 200 / … - 10 … - M12
DDLS 200 / … - 50 … - M12
DDLS 200 / … - 21 …
DDLS 200 / … - 60 … - M12
DDLS 200 / … - 60 …

Mounting / Installation (all device models)
Leuze electronic DDLS 200 11
TNT 35/7-24V
4 Mounting / Installation (all device models)
4.1 Mounting and alignment
An optical data transmission system, consisting of 2 DDLS 200 devices, involves mounting each of
the devices on mutually opposing, plane-parallel, flat and usually vertical walls with unobstructed view
of the opposing DDLS 200.
Make certain that, at the minimum operating distance Amin the optical axes of the devices are aligned
with one another within ± Amin • 0.01 to ensure that the transmission/reception beams of the two de-
vices lie within the opening angle. This also applies for rotary transmission.
Mount each device with 4 screws ∅5mm using 4 of the 5 fastening holes in the mounting plate of the
device (see chapter 3.2 "Dimensioned drawings").
Figure 4.1: Mounting the devices
Note
The opening angle (angle of radiation) of the optics is ± 0.5° (wide angle: ± 1.0° or ± 1.5°,
resp.) to the optical axis! For all device models, the horizontal and vertical adjustment angles
of the fine alignment with the adjustment screws is ±6° for each. The optical transmission
path between the DDLS 200s should not be interrupted. If interruptions cannot be avoided,
be sure to read the notice in chapter 11.4.
Therefore, pay close attention when selecting a suitable mounting location!
Attention!
When laying out a mobile arrangement for a DDLS 200, pay particular attention that the
alignment of the devices relative to one another remains unchanged over the transmission
path.The transmission can be interrupted by e.g. jolts, vibrations or inclination of the mobile
device due to irregularities in the floor or path.
Ensure adequate track stability! (see also "Diagnostic mode" on page 65)
Note
The fine alignment of the transmission system is performed during commissioning
(see chapter 11.3.2 "Fine adjustment"). The position of the optical axis of the DDLS 200 can
be found in chapter 3.2.
DDLS 200/XXX.1-YY DDLS 200/XXX.2-YY
( frequency f1) ( frequency f2)
Horizontal and vertical max. ± (Amin • 0.01)
Amin
Optical axis
360° rotation possible 360° rotation possible

Mounting / Installation (all device models)
12 DDLS 200 Leuze electronic
4.2 Arrangement of adjacent transmission systems
To prevent mutual interference of adjacent transmission systems, the following measures should be
taken in addition to exact alignment:
Figure 4.2: Arrangement of adjacent transmission systems
DDLS 200/XXX.1-YY DDLS 200/XXX.2-YY
DDLS 200/XXX.1-YY DDLS 200/XXX.2-YY
( frequency f1) ( frequency f2)
( frequency f2) ( frequency f1)
( frequency f1) ( frequency f2)
DDLS 200/XXX.1-YYDDLS 200/XXX.2-YY
min. 400mm (DDLS 200/30…) min. 300mm (DDLS 200/80…) min. 300mm (DDLS 200/120…) min. 500mm (DDLS 200/200…) min. 700mm (DDLS 200/300…) min. 700mm (DDLS 200/500…)
Frequency-offset arrangement!
min. tan (0.5°) • operating range (DDLS 200/120…500…) min. tan (1.0°) • operating range (DDLS 200/80…) min. tan (1.5°) • operating range (DDLS 200/30…)
Identical frequency
arrangement

Mounting / Installation (all device models)
Leuze electronic DDLS 200 13
TNT 35/7-24V
• In the case of an offset frequency arrangement, the distance between two parallel data trans-
mission paths must not be less than
•400mm (DDLS 200/30…)
•300mm (DDLS 200/80…)
•300mm (DDLS 200/120…)
•500mm (DDLS 200/200…)
•700mm (DDLS 200/300…)
•700mm (DDLS 200/500…)
.
• In the case of identical frequency arrangement, the distance between two parallel data trans-
mission paths must be at least
•400mm + tan (1.5°) •operating range (DDLS 200/30…)
•300mm + tan (1.0°) •operating range (DDLS 200/80…)
•300mm + tan (0.5°) •operating range (DDLS 200/120…)
•500mm + tan (0.5°) •operating range (DDLS 200/200…)
•700mm + tan (0.5°) •operating range (DDLS 200/300…)
•700mm + tan (0.5°) •operating range (DDLS 200/500…)
.

Mounting / Installation (all device models)
14 DDLS 200 Leuze electronic
4.3 Cascading (series connection) of several DDLS 200 data paths
If two communicating participants (TN) are separated by several optical transmission paths between
two participants, then this is called cascading. There are further participants between the individual
optical transmission paths in this case.
Figure 4.3: Cascading of several DDLS 200 systems
Attention!
If, for example, participant 3 (TN3) of a multi-master bus system wants to exchange data di-
rectly with participant 7 (TN7), then 5 optical transmission paths are cascaded.
This constellation can also occur if, e.g., a programming device that attempts to access par-
ticipant 3 (TN3) is connected to participant 7 (TN7) for maintenance purposes or during com-
missioning of a master-slave-system.
DDLS 200
DDLS 200
DDLS 200
DDLS 200
DDLS 200 DDLS 200
Master
TN1
TN8
TN2
TN4
TN5
TN3
TN6 TN7
Path 1
Path 3
Path 4
Path 2
Path 5 Path 6

Mounting / Installation (all device models)
Leuze electronic DDLS 200 15
TNT 35/7-24V
The following table shows the maximum number of optical transmission paths for cascading.
Bus system Max. number of optical
transmission paths for
cascading Remark
Profibus (with retiming) 3Attention:
Profibus FMS is a multi-master bus
RS 485 (without retiming) 2
Interbus 500kbit (RS 422) 3
Interbus FOC 3Applies for 500kbit and 2Mbit
RIO 3 1)
1) See remarks in the respective chapters of the individual bus systems about the switch position fil-
tered/not filtered depending on the transmission rate.
DH+ 3 1) Attention:
DH+ may be a multi-master bus
DeviceNet 3Depends significantly on the configura-
tion of the master and on the require-
ments of the plant (timing).
CANopen 3
Ethernet 3
Note
The individual time delay of the optical transmission path is specified in the chapters of the
individual bus systems and depends on the type, switch position, and transmission rate.

Mounting / Installation (all device models)
16 DDLS 200 Leuze electronic
4.4 Electrical connection
Described in the following two sub-chapters is the electrical connection of the supply voltage, the input
and the output.
The connection of the respective bus system is described in the following chapters.
4.4.1 Electrical connection - devices with screwed cable glands and terminals
To establish the electrical connections, you must first remove the red housing top with the optics. To
do this, loosen the three housing hex screws. The housing top is now only electrically connected to
the base by means of a connector. Carefully pull the housing top straight forward without skewing.
Figure 4.4: Removing the housing top
Attention!
Connection of the device and maintenance work while under voltage must only be carried
out by a qualified electrician.
If faults cannot be corrected, the device should be removed from operation and protected
against possible use.
Before connecting the device, be sure that the supply voltage agrees with the value printed
on the nameplate.
The DDLS 200… is designed in accordance with safety class III for supply by PELV (Pro-
tective Extra Low Voltage, with reliable disconnection).
For UL applications: only for use in class 2 circuits according to NEC.
Be sure that the functional earth is connected correctly. Error-free operation is only guaran-
teed if the device is connected to functional earth.

Loosen the 3
housing screws

Carefully pull off the
housing top

Mounting / Installation (all device models)
Leuze electronic DDLS 200 17
TNT 35/7-24V
The connection compartment in the housing base with the screwed cable glands is now freely accessible.
Figure 4.5: Positions of the general, non-bus-specific terminals and switches
Supply voltage
Connect the supply voltage, including the functional earth, to the spring terminals labeled Vin, GND
and PE (see figure 4.5).
Note
The connection terminals Vin, GND and PE are provided double to simplify wiring through
the supply voltage to other devices.
The functional earth can alternatively be connected at the screw terminal in the housing
base (max. core cross section 2.5mm
2
)
If you would like to wire through the supply voltage, you should replace the filler plugs on the
right side of the housing base with an M16 x 1.5 screwed cable gland and guide the continu-
ing supply voltage cable through this gland. The housing seal is, in this way, ensured (Pro-
tection Class IP 65).
The housing top can be removed and replaced while under voltage.
OUTOUT
WARNWARN PEPE
PEPE
GNDGND VinVin
ININ PEPE GNDGND
VinVin
S1
Off
On
IN
Terminal Function
Vin Positive supply voltage +18 … +30VDC
GND Negative supply voltage 0VDC
PE Functional earth
OUT
WARN Switching output, activated if level drops below the warning level
IN Switching input for transmitter/receiver
cut-off:
0…2VDC: transmitter/receiver
switched off, no transmission
18 … 30 V DC: transmitter/receiver
active, normal function
Switch Function
S1 On (default): the switching input is not
analyzed. The transmitter/receiver unit
is always in operation.
Off: the switching input is analyzed.
Depending on the input voltage, normal
function or transmitter/receiver unit
switched off.
Max.
core cross
section:
1.5 mm2

Mounting / Installation (all device models)
18 DDLS 200 Leuze electronic
Switching input
The DDLS 200 is equipped with a switching input IN, via which the transmitter/receiver unit can be
switched off, i.e. no infrared light is transmitted and at the bus terminals the corresponding bus bias
level is present / the bus driver is high resistance.
Input voltage: 0 … 2 V DC: transmitter/receiver switched off, no transmission
(relative to GND) 18 … 30 V DC: transmitter/receiver active, normal function
For easier operation, the switching input can be activated/deactivated via switch S1:
Position S1: On the switching input is not analyzed. The transmitter/receiver
unit is always in operation (internal preselection of the switch-
ing input with Vin).
Off the switching input is analyzed. Depending on the input volt-
age, normal function or transmitter/receiver unit switched off.
Switching output
The DDLS 200 is equipped with a switching output OUT WARN which is activated if the receiving level
in the receiver drops.
Output voltage: 0 … 2 V DC: Operating range
(relative to GND) Vin - 2 V DC: Warning or shutoff range
The switching output is protected against:short-circuit, overcurrent, overvoltage,
overheating and transients.
Note!
When transmitter/receiver unit is switched off, the system behaves in the same way as in
the event of a light beam interruption (see chapter 11.4 "Operation").
The switching input can be used, for example, during a corridor change to completely avoid
interference effects from other sensors or the data transmission.
Switch S1 is also present on the device models with M12 connectors.
Note!
The DDLS 200 is still completely functional when the level of the receiving signal drops to
the warning signal level. Checking the alignment, and, if applicable, a readjustment and/or
cleaning of the glass pane leads to a significant improvement of the received signal level.