LA Series

LA Series
Technical information
Light Curtain Type LA
Status: 2011-04-27
Subject to change without notice.
No responsibility is taken for the correctness of
this information.
Your suggestions for corrections or improvements
are welcome!
Features
 No separate control unit is needed. The
device can be directly connected to 24 V DC.
 2 short-circuit-proof PNP-outputs, NPNoutputs optionally
 Functions and parameters configurable via
PC interface.
 Easy-Run:
full configuration settings from factory.
 Automatic range setting during calibration
cycle
 Diagonal beams analysis for enhanced
monitoring resolution.
DUOmetric AG
Weberstr. 8
86836 Lagerlechfeld /Graben
Tel: +49-8232-95979-0
Fax: +49-8232-95979-29
www.duometric.de
E-Mail: support@duometric.de
Technical information
Light Curtain Type LAII
Table of content
Features ..................................................................................................................... 1
Table of content .......................................................................................................... 2
The bars and mechanical design ................................................................................ 3
Functions .................................................................................................................... 4
Signal output ........................................................................................................... 4
Switching Threshold ................................................................................................ 4
Usage .................................................................................................................. 4
Output assignment .................................................................................................. 4
Output assignment „normal“ ................................................................................ 4
Output assignment „inverted“ .............................................................................. 4
Output assignment „inverted without warning“ .................................................... 5
OutDelay ................................................................................................................. 5
Beam variations ...................................................................................................... 6
Recommendations: ............................................................................................. 6
Contamination alarm ............................................................................................... 6
Recommendations: ............................................................................................. 6
TopBlankable .......................................................................................................... 7
Beam Blanking ........................................................................................................ 7
Recommendations: ............................................................................................. 7
Syncbeam – Synchronisation beam ........................................................................ 7
Recommendations: ............................................................................................. 7
Areas....................................................................................................................... 7
Recommendations: ............................................................................................. 7
NOFDARK .............................................................................................................. 8
Configuration values ............................................................................................... 9
Recommendation ................................................................................................ 9
Calibration Sequence ............................................................................................... 10
Recommendations: ........................................................................................... 10
Flashing codes during the calibration cycle ....................................................... 10
LED Indicators / Error Diagnosis .............................................................................. 11
Receiver bar.......................................................................................................... 11
Transmitter bar...................................................................................................... 11
Interfaces / Outputs .................................................................................................. 12
M8 connector ........................................................................................................ 12
Installation / Initial Operation .................................................................................... 12
Conformity ................................................................................................................ 13
Technical Data.......................................................................................................... 13
PC-Interface ............................................................................................................. 14
Ordering Key and Example....................................................................................... 15
Key: ....................................................................................................................... 15
Example ................................................................................................................ 15
Accessories .............................................................................................................. 16
Page LA 2of LA 16
Technical information
Light Curtain Type LAII
The bars and mechanical design
A wide choice of beam spacing and attachment options (mechanical) is available.
Please refer to separate light curtain bar information sheet:
Information sheet:
light curtain bars
Page LA 3 of LA 16
Technical information
Light Curtain Type LAII
Functions
Signal output
You can configure the light curtain to be light or dark switching via the output
function parameter.
light
active
inactive
Free beams
interrupted beams
dark
inactive
active
Switching Threshold
During the calibration sequence the signal intensity of each (parallel) beam is
measured and permanently stored. By multiplying with the relative switching
threshold (percentage of the relative threshold) the absolute threshold for each beam
is determined.
In order to have the system react to small signal reductions a higher switching
threshold has to be adjusted. The threshold shall not exceed 179 (equivalent to
~70%).
Usage
o Automatic threshold detection
o Detection of transparent objects
o Reduced beam deflection influence
=> RelThreshold = 0
=> high threshold
=> high threshold
Output assignment
The light curtain has two outputs (wires black and yellow).
The Output functions can be set via the parameter Output assignment.
Output assignment „normal“
Output
Wire
Out 1
Out 2
Yellow
Black
Out 1
Out 2
Function
Description
Signal out
light or dark switching
Warning out
Active during disruption
Exception –> Start second range ≠ „0“
Yellow
Area 1
light or dark switching
Black
Area 2
light or dark switching
Output assignment „inverted“
Functions like „normal“ but with switched outputs
Output
Wire
Out 1
Out 2
Yellow
Black
Page LA 4of LA 16
Function
Description
Warning out
Active during disruption
Signal out
light or dark switching
Exception –> Start second range ≠ „0“
Technical information
Light Curtain Type LAII
Out 1
Out 2
Yellow
Black
Area 2
Area 1
light or dark switching
light or dark switching
Output assignment „inverted without warning“
Out 1 is without function.
Out 2 is used as Signal out on black wire
Output
Wire
Out 1
Out 2
Yellow
Black
Out 1
Out 2
Function
Description
No function
Signal out
light or dark switching
Exception –> Start second range ≠ „0“
Yellow
No function
Black
Area 1
light or dark switching
Output assignment „antivalent “
Out 1 is as Signal out on yellow wire
Out 2 is active when Out 1 is inactive.
OutDelay
This configuration value delays the status change of switching outputs by the set
value in milliseconds (ms). Maximum delay value is 255 ms.
Page LA 5 of LA 16
Technical information
Light Curtain Type LAII
Beam variations
Parameter
Description
Number of
beams
Max beam
number (n)
Drawing
Diagonal = 0
Diagonal = 1
diagonal beams off
diagonal beams on
n
2n-1
Diagonal = 4
Multiple beam
crossings
5n-6
128
64
26
Recommendations:
o After changing this parameter run a calibration cycle.
o The cycle time increases with the number of beams.
o A total of 128 logical beams is supported.
Contamination alarm
If the beam brightness remains under a certain threshold (weak signal threshold)
for a specific duration (weak signal delay), the light curtain signals a “simple error“.
Remedy:
 Clean the beam output.
Attention: do not damage the front foil. Do not use caustic cleaning
agents.
 Align the bars and recalibrate.
Recommendations:
Set the weak signal threshold parameter to “0“ in order to switch off the
contamination alarm.
Page LA 6of LA 16
Technical information
Light Curtain Type LAII
TopBlankable
When turning on the device interrupted beams and the bar ends can be blanked out
permanently.. TopBlankable defines, how many consecutive beams are blanked
out.
This function was specifically implemented for elevator systems.
Beam Blanking
Permanently interrupted beams can be blanked automatically. Which identical beams
can be blanked is adjusted with the Max.autoblanked parameter.
Max.autoblanked
Automatic Blanking
0
1
2
...
None
each 2. identical beam
each 3. identical beam
...
Defective beams are not considered in the analysis. The parameter Maxdefect
defines the number of ignored beams. A serious error is signaled should the number
of defective beams exceed the value of Maxdefect.
Blanked out beams are not added to Maxdefect.
Recommendations:
o Use the section Beam Configuration on the right side of the DUO-Konfapplication window in order to manually blank out beams. Select there which
receiver element shall be blanked out.
o The Syncbeam must always stay active!
Syncbeam – Synchronisation beam
The Syncbeam parameter defines whether the first (near the connectivity point) or
the last beam is used for the optical synchronisation.
Recommendations:
o Transmitter and receiver have to be set to the same value.
o The Syncbeam cannot be blanked.
o Interruption of the Syncbeam is signal on both sections.
Areas
Parameter Start second area separates the light curtain into two areas.
The status of the areas is signaled at outputs OUT 1 and OUT 2.
Recommendations:
o Switching ranges for Diagonal ≠ 0 (=> diagonal beams on) overlap.
o Interruption of the Syncbeam is signaled in both areas.
o Areas can be configured to be light or dark switching.
Page LA 7 of LA 16
Technical information
Light Curtain Type LAII
NOFDARK
Defines the threshold after which number of interrupted beams the outputs are
switched (separately for both areas).
Example: NofDark1 = ’5’
=> Output of areas 1 switches after 5 interrupted beams in section 1.
Special: „Start second area“= '1'
Both NofDark-values relate to the entire monitoring range.
After reaching the corresponding number id interrupts the corresponding output is
switched.
Page LA 8of LA 16
Technical information
Light Curtain Type LAII
Configuration values
Standard
value
Description
First Beam
1
value always equals 1
Last Beam1
xx
value is system dependent
Output function

Light switching
Dark switching
normal
inverted
inverted without warning
antivalent
0 = diagonal beams off
1 = diagonal beams on
2...4 = multiple beam crossings
84 equals 33% (256 equals 100%)
0 = automatic theshold adjustment activ.
Max. number of allowed defective beams
Output assignment

Diagonal
Relative Threshold
Maxdefect
Delay for Autoblanking
Max. Autoblanked

84
1
60
0
Start for second area
0
Syncbeam
NofDark1
NofDark2
OutDelay
TopBlankable
Weak signal threshold
Weak signal delay

1
1
0
0
147
60
Time in seconds until a beam interruption can be
blanked
Number of consecutive identical beams available
for blanking
Beam number defining the start oft he second
section.
Only recommended for „Diagonal = 0“!
first = synchronisation via first beam
last = synchronisation via last beam
Minimum number of interrupted beams defining
an interruption. (Area 1)
Minimum number of interrupted beams defining
an interruption. (Area 2)
Duration in ms between output state changes.
(range: 0 – 255 ms)
number (1,2 or 3) of beams that can be blanked
consecutively during power-up.
Threshold for contamination warning.
equals 57% (Wert x 256)
Time in seconds after which a contamination is
signaled
AutoCalDelay
Recommendation
o Configuration value „Syncbeam“ must be identical for Transmitter and
Reciever for the light curtain to work properly.
1
Only the value of physically present beams can be adjusted. A incorrect value can result in improper
functionality.
Page LA 9 of LA 16
Technical information
Light Curtain Type LAII
Calibration Sequence
1. Place yellow wire on +24 V DC during activation.
=> self-calibration (other flashing signals as those in normal
mode).
2. Both LED of the receiver bar illuminate steady
=> self-calibration is completed without an error.
3. Remove yellow wire as long as LA is still switched on
=> saves sensitivity data.
Example for implementation with standard connectivity (plus switching):
1. Insert a bridge between connection points of yellow wire and brown wire
(plus).
2. Ensure that the entire monitoring range is uninterrupted.
3. Turn on supply voltages.
4. Remove bridge.
Recommendations:
The calibration is important for proper functionality of the light curtain.
Rerun the calibration after each change on the light curtain.
For an error-free calibration the monitoring range must be free of obstacles and both
LEDs on the receiver must light up.
Flashing codes during the calibration cycle
One LED flashes
Defective beams
LEDs flash in-phase
Differences too big or not yet calibrated. Verify
alignment of bars as well as monitoring range.
LEDs flash out-phase
Error during Selftest
Page LA 10of LA 16
Technical information
Light Curtain Type LAII
LED Indicators / Error Diagnosis
When the light curtain detects a failure, the warning output is enabled and the LED
displays one of the following error codes. As soon as the failure is resolved, the
output becomes inactive again.
Receiver bar
LED1
LED2
Operating mode
Monitoring area
off
on
on
flashing
flashing
Double
flashing
flashing
off
on
off
on
off
Off
off
operational
operational
simple error
simple error
Configuration error
unknown
free
beam interrupted
free
beam interrupted
unknown
flashing
fatal error A
unknown
fatal error B
unknown
(in phase)
flashing
flashing
(out of phase)
Simple error:
Light curtain continues to run with constriction, for example, beam blanked or
contamination alarm.
Fatal error:
Light curtain no longer operational.
Transmitter bar
LED
Operating mode
off
on
flashing
off
operational
error
Page LA 11 of LA 16
Technical information
Light Curtain Type LAII
Interfaces / Outputs
M8 connector
View towards connector pins
Installation / Initial Operation
 Pay attention to the installation rules (see mounting instructions for light curtain bar
pairs).
 Avoid optical sensors from mutually affecting each other, even through reflection,
because this can lead to malfunction.
 Maximal 1.5 secounds after power up the light curtain is operating.
 Insulate unused wires.
 Disconnect the connections during insulation measurements.
 Execute a calibration cycle.
Page LA 12of LA 16
Technical information
Light Curtain Type LAII
Conformity
The light curtain version LA is
compliant and meets all the
requirements of the following standards:
 EN 61000-6-3:2001.
 EN 61000-6-1:2001.
The light curtains are not certified safety lights curtains compliant
with EN 61496. They are not safety components in the context of
EU Machine Guideline 89/392/EEC with 93/44/EMW addition,
Appendix 4.
Therefore, they must not be used so as not to endanger
individuals.
Technical Data
Light curtain housing
Connection
Transmitter
Receiver
Operating voltage
Power consumption
Outputs
Operating temperature
Range2
Reduced range
Response time
Maximum number of
beams
2
Naturally anodised aluminium, plastic front panel, dark
red
(Do not use any cleaning agents containing solvents!)
Securely attached lines 4 m long, precut with wire end
ferrules
2-core round cable,  about 4,9 mm (PVC)
4-core round cable,  about 4,9 mm (PVC)
24 V DC (-15%..+20%) with max. ripple 5%, protected
against polarity reversal,
use polarised earthed power supply!
approx. 8 W (total)
Short-circuit-proof semiconductor outputs
PNP (or NPN) switched current max. 200 mA
-10°C to 45 °C
~ 0.7 ... 4 m (calibration necessary)
default setting: 4m
~ 0.2 … 1 m (calibration necessary)
1 ms cycle time per beam plus base time (~4 ms)
128 logical beams
With standard profile. Range with other profile types see techn. Information light grid bar pairs.
Page LA 13 of LA 16
Technical information
Light Curtain Type LAII
PC-Interface
The PC Interface connects to the serial port of a PC.
Use the Software DUO-Konf for configuration of a light curtain pair.
Plus switching light curtain
Transmitter
brown
blue
green
Receiver
brown
blue
black
yellow
Minus switching light curtain
Receiver
brown
blue
black
yellow
Page LA 14of LA 16
Technical information
Light Curtain Type LAII
Ordering Key and Example
Key:
Type
„LA“
Light curtain bar pair
Consisting of receiver and transmitter bar
Beam Number /
Mechanical
Options
Beam Separation
Choose from beam
Choose from 4
 Color
seperation between
shapes and 8
 Cable length
5mm and 112 mm.
mounting options
 Connectivity option
 Front cover
 ….
For details regarding the specific ordering codes refer to detailed light curtain bar document .
Example
LA16/112-2000A
Light curtain bar pair with integrated controler unit
 (24 Vdc, PNP)
 16 beams
 Beam spacing of approx. 112 mm
 Bar length 2000 mm, bar cross-section 12x24 mm,
Aluminium naturally anodized
 4 bolts on top, cone on the bottom
 Protection class IP54
Parameterisation: standard*)
LA24/12,5-510I
Light curtain bar pair with integrated controler unit
 (24 Vdc, PNP)
 24 beams
 Beam spacing of approx. 12,5 mm
 Bar length 510 mm, bar cross-section 12x24 mm,
Aluminium naturally anodized
 2 M4x10 threaded stud bolts spaced 400 mm
apart
 Protection class IP54
Parameterisation:
 dark
 diagonal beams
*) Default values can be found in the configuration table. Please mention different
parameterisations in your purchase order.
Page LA 15 of LA 16
Technical information
Light Curtain Type LAII
Accessories
LCPower/2
FP-110-00001
Power Supply(24Vdc) for types LC/LA/LT
- 230/110 Vac
- plastic housing
- Protection class IP65
- Relais
LCPower/2-SR Power Supply(24Vdc) for types LC/LA/LT
FP-110-00002 - 2xRelaisoutput
- connections via PG 9
- internal connection via terminal block
- plastic housing
- buzzer
Programminginterface LA
FP-20-13538
Page LA 16of LA 16
Programming interface for plus- and minus switching systems
Including connection wires
DUO_Konf-Software for Download:
http://www.duometric.com/Dokus/LA/
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