Leuze PRK 55 Ex Series 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_PRK55_Ex_en_50113749_02.fm
Polarized retro-reflective photoelectric sen-
sor, autocollimation optics with visible red
light
Particularly suited for highly transparent bot-
tles (PET and glass)
316L stainless steel housing in
WASH-DOWN design
Scratch resistant and non-diffusive plastic
front cover
Easy adjustment via lockable teach button
or teach input
Certification
II 3G Ex nA op is IIB T4 Gc X
II 3D Ex tc IIIC T70°C Dc IP67 X
0…3.5m
Accessories:
(available separately)
Cables with M8 connector
ATTENTION!
Only use cables with axial (straight)
plug outlet (see dimensioned draw-
ing).
Dimensioned drawing
A4x M3 x 8 screws
B1 Distance bolts
B2 Distance bolts
C55 series sensor
DFastening holes for
M3 x 20 screws
EName plate
FOptical axis
GIndicator diodes
Electrical connection
Connector, 4-pin
DANGER!
Observe the notices for installation and commissioning!
Do not disconnect the sensor connection within the potentially
explosive area while under voltage!
Connector, 3-pin
PRK 55 Ex Retro-reflective photoelectric sensors with polarization filter for bottles
PRK 55/6D.42-S8.3 Ex - 03
Technical data and description
en 2020/08/21 50113749-02

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Technical data
Optical data
Typ. operating range limit (TK(S) 100 x
100) 1)
1) Typ. operating range limit: max. attainable range without function reserve
0…3.5m
Operating range 2)
2) Operating range: recommended range with function reserve
See tables
Light source 3)
3) Average life expectancy 100,000h at an ambient temperature of 25°C
LED (modulated light)
Wavelength 620nm (visible red light, polarized)
Time behavior
Switching frequency 1000Hz
Response time 0.5ms
Readiness delay 300ms
Electrical data
Operating voltage UB10 … 30VDC (incl. residual ripple)
Residual ripple 15% of UB
Open-circuit current 18mA
Switching output…/6D.42 4)
4) The push-pull switching outputs must not be connected in parallel
1 push-pull switching output
OUT1 (Pin 4):PNP dark switching, NPN light switching
…/6.42 4) 1 push-pull switching output
OUT1 (pin 4): PNP light switching, NPN dark switching
IN (pin 2): teach input
Function Light/dark reversible
Signal voltage high/low (UB-2V)/2V
Output current Max. 100mA
Operating range Setting via teach-in
Indicators
Green LED Ready
Yellow LED Light path free
Yellow LED, flashing Light path free, no function reserve 5)
5) Display "no function reserve" as yellow flashing LED is only available in standard teach setting
Mechanical data
Housing AISI 316L stainless steel, DIN X2CrNiMo17132, W.No. 1.4404
Protective housing Stainless steel AISI 303, DIN X8CrNiS18-9, W.Nr 1.4305
Optics cover Coated plastic (PMMA), scratch resistant and non-diffusive
Operation Plastic (TPV-PE), non-diffusive
Weight With M8 connector: 130g
Connection type M8 connector, 3-pin
Environmental data
Ambient temp. (operation/storage) -20°C … +50°C/-30°C … +60°C
Protective circuit 6)
6) 2=polarity reversal protection, 3=short circuit protection for all transistor outputs
2, 3
VDE protection class 7)
7) Rating voltage 50V
III
Degree of protection IP 67
Light source Exempt group (in acc. with EN 62471)
Standards applied IEC 60947-5-2
Explosion protection
Certification (CENELEC) II 3G Ex nA op is IIB T4 Gc X
II 3D Ex tc IIIC T70 °C Dc IP67 X
NOTE
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 accordance with its intended use.
Order guide
Designation Part no.
With M8 connector, 3-pin PRK 55/6D.42-S8.3 Ex 50115207
With M8 connector, 4-pin PRK 55/6.42-S8 Ex 50119364
Tables
TK … = adhesive
TKS … = screw type
Reflectors in food
quality
Operating
range
1 TK(S) 100x100 0 … 3.0m
2 TK 40x60 0 … 2.0m
3 Film 6 50x50 0 … 1.2m
4 TK 20x40 0 … 1.0m
5 Film 4 50x50 0 … 0.5m
10 3 3.6
20 2.0 2.4
30 1.2 1.4
40 1.0 1.2
50 0.5 0.6
Pharmaceutical
reflectors
Operating
range
1 TK(S) 40x60.P 0 … 1.2m
2TK BR53 0…1.0m
3 TK(S) 20x40.P 0 … 0.7m
4 TK(S) 20.P 0 … 0.5m
5 MTK(S) 14x23.P 0 … 0.25m
6TK 10.P 0…0.2m
10 1.2 1.4
20 1.0 1.2
30 0.7 0.8
40 0.5 0.6
5 0 0.25 0.3
60 0.2 0.25
Operating range [m]
Typ. operating range limit [m]
Diagrams
ATK 100x100
BTKS 40x60
CTKS 20x40
DFilm 4: 50x50
-40
-20
-30
-10
0
10
20
30
40
0 0,5 1,5 2,0 2,5 3,0 3,5
1,0
y1
y2
Distance x [m]
Misalignment y [mm]
Typ. response behavior
y2
x
y1
0
0,5 1,0 1,5 2,0 3,0 3,5
0
5
10
15
20
25
30
35
40
45
50
2,5
A
B
C
D
Distance x [m]
Function reserve
Typ. function reserve
PRK 55 Ex

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Sensor adjustment (teach) via teach button
Teach for 11% sensor sensitivity (highly transparent bottles and films with thickness > 20µm)
Press teach button until both LEDs flash
simultaneously.
Release teach button.
Ready.
After the teaching, the sensor switches
when about 11% of the light beam are cov-
ered by the object.
Teach for 18% sensor sensitivity (standard
bottles)
Press teach button until both LEDs flash
alternately.
Release teach button.
Ready.
After the teaching, the sensor switches
when about 18% of the light beam are cov-
ered by the object.
The sensor is factory-adjusted for maximum operating
range.
Recommendation: teach only if the desired objects are not reli-
ably detected.
Prior to teaching:
Clear the light path to the reflector!
The device setting is stored in a fail-safe way. A reconfiguration
following power failure or switch-off is thus not required.
2…7s
Simultaneously
flashing at
3Hz
LED
green
LED
yellow
7…12s
Alternately
flashing at
3Hz
LED
green
LED
yellow
PRK 55 Ex Retro-reflective photoelectric sensors with polarization filter for bottles

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Teaching for maximum operating range (factory setting at delivery)
Prior to teaching:
Cover the light path to the reflector!
Press teach button until both LEDs flash
simultaneously.
Release teach button.
Ready.
Adjusting the switching behavior of the
switching output – light/dark switching
Press teach button until the green LED flashes.
The yellow LED displays the current setting of the
switching output:
ON = output switches on light
OFF = output switches on dark
Continue to press the teach button in order to
change the switching behavior.
Release teach button.
Ready.
2…7s
Simultaneously
flashing at
3Hz
LED
green
LED
yellow
>12s
LED
green
flashes
with
3Hz
Yellow LED
ON =
light switching
OFF =
dark switching
PRK 55 Ex

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Notices for the safe use of sensors in potentially explosive areas
The valid range encompasses devices of Group II, Category 3, Zones 2 ("Gas Ex") and 22 ("Dust Ex").
Installation and Commissioning
The devices must only be installed and commissioned by trained electricians. They must be aware of the regulations and oper-
ation of explosion-proof equipment.
Static charge on plastic surfaces must be avoided.
To prevent unintentional separation under voltage, devices with connector (e.g. Series 46B) must be equipped with a safeguard
or a mechanical interlocking guard (e.g. K-V M12-Ex, part no. 50109217). The warning sign "Do not disconnect under voltage"
that is supplied with the device must be attached to the sensor or its mounting bracket so that it is clearly visible.
Devices with terminal compartment lid (e.g. Series 96) must only be commissioned if the terminal compartment lid of the device
is properly sealed.
Connection cables and connectors must be protected from excessive or unintended pulling or pushing strain.
Prevent dust deposits from forming on the devices.
Metallic parts (e.g. housing, mounting devices) are to be integrated into the potential equalization to prevent electrostatic
charge.
Maintenance
No changes may be made to explosion-proof devices.
Repairs may only be performed by persons trained for such work or by the manufacturer.
Defective devices must be replaced immediately.
Cyclical maintenance is generally not necessary.
Depending on the environmental conditions, it may occasionally be necessary to clean the optical surfaces of the sensors. The
cleaning must only be performed by persons trained for performing this task. We recommend the use of a soft and damp cloth.
Cleaning agents containing solvents must not be used.
ATTENTION!
Check whether the equipment classification corresponds to the requirements of the application.
A safe operation is only possible if the equipment is used properly and for its intended purpose.
Electrical equipment may endanger humans and (where applicable) animal health, and may threaten the safety of
goods if used incorrectly or under unfavorable conditions in potentially explosive areas.
The applicable national regulations (e.g. EN 60079-14) for the configuration and installation of explosion-proof sys-
tems must be observed.
PRK 55 Ex Retro-reflective photoelectric sensors with polarization filter for bottles

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Chemical resistance
The sensors demonstrate good resistance against diluted (weak) acids and bases.
Exposure to organic solvents is possible only under certain circumstances and only for short periods of time.
Resistance to chemicals must be examined on a case by case basis.
Special conditions
The sensor must be removed from the protective housing in order to connect the M8 connector. After the connection has been
established, the sensor must be installed back into the protective housing properly. Operation without protective housing is not
permitted.
If the sensor is connected to the M8 connector and installed properly in the protective housing, the connector can no longer be
unintentionally separated. Further mechanical protective measures are therefore not necessary.
The devices must be installed in such a way that they are protected from direct exposure to UV rays (sunlight).
Application notes
NOTE
For glossy surfaces (e.g. metals), the light beam should not be incident on the object surface at a right angle. A slight
inclination is sufficient for preventing undesired direct reflections. This may result in a reduction of the range.
Objects should only be moved in laterally from the right or left. Moving in objects from the connector side or operating
side is to be avoided.
Outside of the operating range, the sensor operates as an energetic diffuse reflection sensor. Light objects can still
be reliably detected up to the maximum range.
The sensors are equipped with effective measures for the maximum avoidance of mutual interference should they be
mounted opposite one another. Opposite mounting of multiple sensors of the same type should, however, absolutely
be avoided.
PRK 55 Ex

PRK 55/6D.42-S8.3 Ex - 03 2020/08/21
Mounting instructions
1Protective housing
2a, 2b Distance bolts (mounted)
3M3 screw
4Disc
5a, 5b Mounting devices (e.g. UMS 25, BT 25, …)
6Plate BT 3
1.Place device in the protective
housing in the direction of the
arrow.
2.Fit fastening screws (item 3) with washers (item 4)
according to diagrams , ,  depending on the
installation situation, push through the device and
securely tighten.



PRK 55 Ex Retro-reflective photoelectric sensors with polarization filter for bottles