Leuze electronic AKS 171.2 User manual

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone]
[email protected] • www.leuze.com
We reserve the right to make changes • PAL_AKS171_2_en_50140931.fm
Gapless detection of the smallest parts
through automatic adjustment in the range
of 60 mm (in front of transmitter)
4-step switch for adaptation to the size of the
ejected goods (receiver)
Optimum adaptation of the transmitting
power by means of an infinitely adjustable
potentiometer (transmitter)
Exact, time-saving alignment though indica-
tor LEDs – bar graph – and variation of the
transmitting power
Static and dynamic monitoring in the range
between 300 … 1700 mm
Static detection of parts that were left
behind
Warning output if reception signal is too low
Compact design in metal construction.
300 … 1700 mm
IP 54
Accessories:
(available separately)
Cables with M12 connector (KD …)
Dimensioned drawing
AReceiver: 4-step switch (adaptation to the thickness of the parts)
BLEDs
CProtection cap for receiver, screw type
Electrical connection
Transmitter Receiver
AKS 171.2 Ejection monitoring
AKS 171.2… - 01
en 01-2018/11 50140931

AKS 171.2… - 01 2018/11
Technical data
Optical data
Operating ranges 1)
1) Operating range: recommended range with function reserve
300 … 1700mm (distance transmitter-receiver)
Detection range Distance x 54 mm (height)
Smallest detectable part Ø 10 x 0.5 mm, dynamic
Ø 15 x 0.5 mm, static
Object detection
Distance transmitter/receiver Maximum 1700 mm in the range 300 … 1700 mm
Minimum 300 mm, dependent on the object size
Transmitter
Adaptation of the transmitting power as a
function of the transmitter/receiver distance
With infinitely adjustable potentiometer (under screw
cap)
Light beam propagation Divergent band
Light-band width Approx. 20 mm at 1 m
Transmitting components 5 LEDs
Pulse frequency 10 kHz
Wavelength 880 nm
Optics Cylindrical lens 60 x 15 mm
Receiver
Optics Cylindrical lens 60 x 15 mm
Wavelength 880 nm
Receiving components 22 pin photodiodes
Switch, red Presetting of the object size
Position 1: 2 - 3 mm
Position 2: 1.5 - 2 mm
Position 3: 1 - 1.5 mm
Position 4: 0.5 - 1 mm
Smallest detectable part Ø 10 x 0.5 mm
Time behavior
Detection speed 0 (static) to 3 m/s (dynamic)
Pulse stretching on ejection (output Q) Approx. 150 ms (see diagram)
Response delay for parts that were left behind
(output Q)
Approx. 50 ms (see dia-
gram)
Readiness delay 100 ms
Switching frequency 5Hz
Response delay Warning output:500 ms
Dark pulse: 5ms
Electrical data
Operating voltage UB24 V DC ± 15%
Residual ripple 15% of UB
Current consumption, max. Transmitter: 60 mA Receiver: 60 mA
Outputs Warning output QW:PNP
Switching output Q: PNP, dark switching
Output current Max. 100 mA per output
Indicators
Transmitter
Green LED Ready
Yellow LED Transmitter activated
Receiver
Yellow LED Output Q
Red LED Output QWcontinuous light with reserve,
flashing without reserve
Mechanical data
Housing Aluminum, black anodized
Optics Glass
Weight 400 g
Connection type M12 connector
Environmental data
Ambient temp. (operation/storage) -20°C … +40°C / -30°C … +70°C
Protective circuit 2)
2) 1=transient protection, 2=polarity reversal protection, 3=short circuit protection for all outputs
1, 2, 3
VDE protection class III
Degree of protection IP 54
Light source Exempt group (in acc. with EN 62471)
Standards applied IEC 60947-5-2
Additional function
Activation input inactive
Transmitter inactive/active 8 V / 2 V or not connected
Activation/disable delay 0.5 ms
SYNC Not connected
Diagrams
AOutput Q
BEjection part, dynamic
CStatic part left behind
A
B
C
Notes
The preferred direction for
the gapless detection of
parts that have been left
behind is perpendicular to
the lens-edge shift angle
30°
Observe intended use!
This product is not a safety sensor
and is not intended as personnel
protection.
The product may only be put into
operation by competent persons.
Only use the product in accor-
dance with its intended use.
AKS 171.2

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone] AKS 171.2… - 01
[email protected] • www.leuze.com
Order guide
Alignment - Setting
Device overview
The AKS 171.2 sensor system is a fast, high-resolution light curtain consisting of transmitter and receiver:
Designation Part no.
Transmitter unit AKS 171.2/4.5.1SE-S12 50138388
Receiver unit (with protection cap, 15 mm deep) AKS 171.2/4.5.1E-S12 50138389
Set consisting of transmitter (50138388) and receiver (50138389) SET AKS 171.2/4.5.1-S12 50140950
Note!
Prerequisite for optimum function of the system is the proper alignment and adjustment of transmitter and receiver as
described in the following. A poorly adjusted system functions poorly!
AKS 171.2 transmitter AKS 171.2 receiver
(with mounted protection cap, 15 mm deep)
AKS 171.2 Ejection monitoring

AKS 171.2… - 01 2018/11
Indicators and operational controls
The following display and operating elements are relevant for the alignment and adjustment procedure:
AKS 171.2 transmitter
①
②
③
③
①Green LED - ready
②Yellow LED - transmitter active
③Adjustment potentiometer
(potentiometer cover removed)
AKS 171.2 receiver
⑤
⑥
④
④
Red LED - Reception signal
3 states:
-Off: no reception signal
-Flashing: weak reception signal
-On: good reception signal
⑤
Yellow LED – switching output state
2 states:
-On: active
-Off: inactive
⑥
Rotary switch - Object size
4 positions:
-4: object size 0.5 … 1.0mm
-3: object size 1.0 … 1.5mm
-2: object size 1.5 … 2.0mm
-1: object size 2.0 … 3.0mm
Rear side
Optics side
⑦
⑧
⑦
3 yellow LEDs - Alignment display
4 states:
-3 LEDs on good reception signal
-2 LEDs on moderate reception signal
-1 LED on weak reception signal
-0 LEDs on very weak or no reception signal
⑧
Red LED - Illumination indicator
2 states:
-On: uneven illumination
-Off: even illumination (rest state)
AKS 171.2

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone] AKS 171.2… - 01
[email protected] • www.leuze.com
Mounting / exchange
Removal / exchange
When replacing defective devices, the photoelectric sensors should be replaced in pairs (transmitter + receiver) for optimum func-
tion. Any previously present AKS171 or AKS171.1 systems can be converted to the AKS171.2 without problem.
1.Remove cable plug on transmitter and receiver.
2.Mechanically dismount transmitter + receiver, noting on which side the transmitter and receiver are mounted while doing so.
Mounting
1.Screw sensors to the machine with the same orientation (e.g., each connector plug facing downward and at the same height
(flush)).
2.The distance between chute edge and the middle of the light-band (lens middle) should be approx. 20 mm (reference value,
dependent on external conditions such as glossy objects, etc.) 1).
3.The holder or frame that holds the holder must be sufficiently sturdy 2).
4.Reflective surfaces that are parallel to the light-band should be avoided.
5.The upper edge of the chute must be located within the detection range of the sensor (light-band) (lower edges of the lens below
the upper edge of the chute). 3)
6.Electrically connect transmitter and receiver. Mount cable plugs and tighten coupling rings.
Note the different wiring of transmitter and receiver.
Preparations
First, transmitter and receiver must be roughly aligned by sight, with the optics facing one another. The rotary axes mentioned in
the following description are defined as follows (using the example of the transmitter, receiver accordingly):
1) An insufficient distance to the chute or other objects may, due to reflections, make it impossible for the the sensor to be correctly aligned in the next step or for
small parts to be reliably detected later on. A distance that is too large increases the probability that slowly incoming parts will fall between the ramp edge and
the sensor detection range.
2) Prerequisite for proper function is that the transmitter and receiver cannot move relative to one another, even in the event of strong physical shocks.
3) If a sensor is mounted too high, the objects that are to be detected may fall below the detection range; if a sensor is mounted too low, parts could jump out of
the detection range.
Ⓓ
Ⓒ
Ⓑ
Ⓐ
ⒶChute
ⒷIR light-band (invisible)
ⒸLower edge of chute
ⒹFlush
ⒶRotation about the X-axis
ⒷRotation about the Y-axis
ⒸRotation about the Z-axis
Ⓒ
Ⓑ
Ⓐ
AKS 171.2 Ejection monitoring

AKS 171.2… - 01 2018/11
Connect the supply voltage to the transmitter and receiver. After the readiness delay, the devices should be in the following states.
Transmitter
Green LED ①illuminates: ready.
Yellow LED ②illuminates: transmitter activated.
If the yellow LED does not illuminate, check the electrical connection (black wire / pin 4). To activate the transmitter, pin 4 must be
connected to ground potential (e.g., connected with the blue wire / pin 3) or not connected.
Receiver
There are various display constellations depending on the alignment state. At least one of the two LEDs on the rear side of the
housing must illuminate, however:
Red LED ④illuminates or flashes: transmitter signal detected
Yellow LED ⑤illuminates: output active
Alignment
Basic alignment of transmitter
1.Remove potentiometer cover on transmitter
2.Turn potentiometer ③on the sensor using a suitable screwdriver (2.5mm blade) clockwise at least 4 full turns for maximum
transmitting power (potentiometer has no limit stop).
3.Align transmitter in Y- and Z-axis by sight and affix in place. Turn along the X-axis (left or right) until at least one yellow LED of
the alignment indicator ⑦on the receiver illuminates.
4.Lightly secure transmitter (screw in place).
Fine alignment
1.Beginning with the receiver, optimize the alignment of transmitter and receiver, alternately adjusting the X-axis of each until all
3 yellow LEDs of the alignment indicator ⑦on the receiver illuminate. Lightly secure the devices after each step.
2.Reduce the transmitting power of the transmitter by turning the potentiometer ③counterclockwise until only 2 yellow LEDs on
the alignment indicator ⑦illuminate.
3.With the potentiometer adjustment from step 2., further optimize transmitter and receiver along the X-axis and try to again illu-
minate all 3 yellow LEDs of the alignment indicator ⑦.
4.Repeat steps 2. and 3. until the third LED can no longer be illuminated by turning the sensor along the X-axis. The optimum
alignment has then been found.
5.Now tighten the X-axis of the receiver so that it is immovable, whereby the found alignment position must not be changed from
this point on.
6.Slowly turn the potentiometer ③on the transmitter clockwise until the third yellow LED of the alignment indicator ⑦again just
illuminates (all 3 yellow LEDs of the alignment display illuminate now, the red LED ⑧must not illuminate if the light path is free).
7.Again loosen the transmitter in the X-axis and alternately turn to the left and right to determine the position at which the third LED
in the alignment display ⑦on the receiver switches off and only 2 yellow LEDs illuminate. The optimum alignment along the
X-axis for the transmitter is located in the middle between these two ascertained positions.
8.Now also tighten the X-axis of the transmitter so that it is immovable, whereby the ascertained alignment position must not be
changed from this point on.
Note!
Input pin 4 can be used during operation to perform a simple system test.
If pin 4 of the transmitter is connected to the supply voltage potential (deactivation), this results in a signal change cor-
responding to an interrupted light path (from inactive to active – dark switching) at pin 4 of the receiver (switching out-
put) if the light path is free.
Note!
The accuracy of the alignment is essential for the detection of small parts and for the insensitivity of the sys-
tem with respect to physical shocks.
AKS 171.2

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone] AKS 171.2… - 01
[email protected] • www.leuze.com
Setting
Before adjusting, the transmitter and receiver must be aligned as described in sections "Preparations" and "Alignment."
Objectives:
Adjust the transmitter and receiver so that the required sensitivity is achieved.
Reliable, fault-free detection of small objects.
1.Set switch ⑥on the receiver to the minimum object size (position '4').
2.Turn the potentiometer ③on the transmitter clockwise at least 4 full rotations (maximum position).
3.With the light axis free, slowly turn potentiometer ③counterclockwise until the red illumination LED ⑧just switches off (at max-
imum distance between transmitter and receiver (1700 mm), this is, under certain circumstances, the case even without turning
back the potentiometer).
4.Interrupt and again clear the light axis several times to check whether the red illumination LED ⑧reliably switches off each time.
5.If not, turn potentiometer ③on the transmitter counterclockwise approx. ¼ turn and repeat the previous step.
6.The system is correctly adjusted if:
- all 3 yellow LEDs of the alignment indicator ⑦illuminate
- the red LED ⑧does not illuminate with free light paths (it may, however, illuminate if objects are in the light path).
7.Transmitter: remount potentiometer cover on the potentiometer ③.
Receiver: use switch ⑥to set object size.
Function test
1.Transmitter:
green LED ①and yellow LED ②must illuminate.
2.Receiver
If light path is free:
-RedLED④(signal) must illuminate constantly (not flash).
- All 3 yellow LEDs in the alignment indicator ⑦illuminate.
-RedLED⑧(illumination indicator) must not illuminate.
If there are objects in the light path:
- Yellow LED ⑤(state output on receiver) illuminates -> object detected.
-RedLED④(receiver signal strength) on the rear side of the receiver switches off while large objects1) are located in the light
path. For smaller objects, it illuminates constantly or flashes.
-RedLED⑧(illumination indicator) illuminates upon detection; is dark, however, if the light path is free.
Trouble shooting
1) Large object = light path is fully or largely darkened.
Fault image Error Possible remedy
Sensor: both LEDs ①, ②off Supply voltage missing or polarity
reversed or transmitter defective
Check power supply unit / wiring, exchange device
if necessary and send to manufacturer for repair.
Transmitter: green LED ①illumi-
nates, yellow LED ②off
Transmitter deactivated Connect pin 4 (black wire) to pin 3 (blue wire) or
isolate pin 4 (black wire).
Receiver: both LEDs ④, ⑤dark Supply voltage missing or receiver
defective
Check power supply unit / wiring; replace receiver
if necessary.
Red LED ④(signal indicator) off, yel-
low LED ⑤illuminates continuously,
switching output active
No or very weak signal received from
transmitter (light path interrupted,
large object, massive soiling, potenti-
ometer ③on transmitter misadjusted)
or transmitter without supply or trans-
mitter defective or transmitter/receiver
alignment very bad
Check whether light path is free, check whether
transmitter is active (both LEDs ①, ②on).
Check transmitter adjustment (potentiometer ③)
and alignment.
Red LED ④(signal indicator) flashes,
yellow LED ⑤off
Object in the light path, weak recep-
tion signal, sensor is at the function
limit but still just managing to function
Check whether light path is free. Clean optics with
lint-free cloth and alcohol, check alignment, check
potentiometer adjustment ③on transmitter.
AKS 171.2 Ejection monitoring

AKS 171.2… - 01 2018/11
Red LED ④(signal indicator) flashes,
yellow LED ⑤illuminates
Object in the light path, weak recep-
tion signal, sensor is just below the
function limit, just barely no longer
functions
Check whether light path is free. Clean optics with
lint-free cloth and alcohol, check alignment, check
potentiometer adjustment ③on transmitter.
Alignment indicator ⑦in optics: fewer
than 3 yellow LEDs illuminate
Reception signal too weak Check whether light path is free, clean optics, turn
potentiometer ③clockwise until 3 LEDs ⑦just
illuminate, check and, if necessary, correct align-
ment at the same time.
Red illumination indicator ⑧in the
optics illuminates continuously
Uneven illumination of the receiver or
device defective
Check whether light axis is free.
Check lenses for soiling and clean with lint-free
cloth and alcohol if necessary.
Turn potentiometer ③back approx. ¼ turn. Check
alignment.
During the initial alignment, check whether the
problem can be rectified by changing the position
of the Y-axis (particularly at the transmitter).
Check whether the problem is caused by reflec-
tions on adjacent parts (cover adjacent parts with
dark matt paper or similar for test purposes).
Exchange devices if necessary and send to manu-
facturer for repair.
Small parts are not reliably detected Incorrect adjustment and/or alignment Check switch position for object size ⑥on
receiver, turn potentiometer ③on transmitter
counterclockwise until only 2 LEDs illuminate on
the alignment indicator ⑦; then carefully turn back
clockwise until the third yellow LED of the align-
ment indicator ⑦just switches on again with free
light path.
Check whether slow, small objects could fall
through the detection area (incorrect mounting
position).
Check whether small objects could jump over the
the detection area and take measures to prevent
this from happening, e.g., with baffles.
Sensor switches without object in the
event of physical shocks
Bad/incorrect alignment of transmitter
and/or receiver or unsuitable mount-
ing bracket/support (too instable)
Realign sensor (transmitter and receiver) accord-
ing to instructions (see sections "Preparations" and
"Alignment").
Use stable mounting bracket (transmitter and
receiver must not be able to move relative to one
another).
Illumination indicator ⑧illuminates if
receiver optics are fully shaded or if
transmitter is inactive
Receiver defective Exchange device if necessary and send to manu-
facturer for repair.
AKS 171.2