Leuze electronic PRK 55 Ex User manual

We reserve the right to make changes • DS_PRK55_Ex_en_50113749.fm
Polarized retro-reflective photoelectric
sensor, autocollimation optics with visible
red light
Particularly suited for highly transparent
bottles (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
1 kHz
10 - 30V
DC
Accessories:
(available separately)
Cables with M8 connector
Attention!
Only use cables with axial (straight)
plug outlet (see dimensioned
drawing).
IEC 60947...
IEC 60947...
IPIP69K69K
IPIP6767
Dimensioned drawing
A4x screw M3 x 8
B1 Distance bolts
B2 Distance bolts
CSensor Series 55
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
Specifications and description
en 02-2012/09 50113749
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

Specifications
Remarks
Approved purpose
This product may only be used by qualified personnel and must only be used for the
approved purpose. This sensor is not a safety sensor and is not to be used for the protection
of persons.
Optical data
Typ. op. range limit (TK(S) 100x100) 1)
1) Typ. operating range limit: max. attainable range without performance reserve
0…3.5m
Operating range 2)
2) Operating range: recommended range with performance 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)
Timing
Switching frequency 1000Hz
Response time 0.5ms
Delay before start-up ≤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 characteristics 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 performance reserve 5)
5) Display "no performance 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 … +70°C
Protective circuit 6)
6) 2=polarity reversal protection, 3=short circuit protection for all transistor outputs
2, 3
VDE safety class 7)
7) Rating voltage 50 V
III
Protection class IP 67
Light source exempt group (in accordance 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
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
2TK 40x60 0…2.0m
3Tape6 50x50 0…1.2m
4TK 20x40 0…1.0m
5Tape4 50x50 0…0.5m
10 3 3.6
2 0 2.0 2.4
3 0 1.2 1.4
4 0 1.0 1.2
5 0 0.5 0.6
Pharmaceutical reflectors Operating
range
1 TK(S) 40x60.P 0 … 1.2m
2TK BR530…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
6 TK 10.P 0 … 0.2m
1 0 1.2 1.4
2 0 1.0 1.2
3 0 0.7 0.8
4 0 0.5 0.6
5 0 0.25 0.3
6 0 0.2 0.25
Operating range [m]
Typ. operating range limit [m]
Diagrams
ATK 100x100
BTKS 40x60
CTKS 20x40
DTape 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]
Performance reserve
Typ. performance reserve
PRK 55 Ex
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

Sensor adjustment (teach) via teach button
Teach for 11% sensor sensitivity (highly transparent bottles and foils 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
covered by the object.
Teach for 18% sensor sensitivity (standard bottles)
Press teach button until both LEDs flash
alternatingly.
Release teach button.
Ready.
After the teaching, the sensor switches
when about 18% of the light beam are
covered by the object.
The sensor is factory-adjusted for maximum
operating range.
Recommendation: teach only if the desired objects are not
reliably detected.
Prior to teaching:
Clear the light path to the reflector!
The device setting is stored in a fail-safe way. A reconfiguration
following voltage interruption or switch-off is thus not required.
2…7s
simultaneously
flashing at
3Hz
LED
green
LED
yellow
7…12s
alternatingly
flashing at
3Hz
LED
green
LED
yellow
PRK 55 ExRetro-reflective photoelectric sensors with polarization filter for bottles
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

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 light switching
OFF = output dark switching
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 at
3Hz
LED yellow
ON =
light switching
OFF =
dark switching
PRK 55 Ex
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

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").
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 systems must
be observed.
Installation and Commissioning
The devices must only be installed and commissioned by trained electricians. They must be aware of the regulations and
operation 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 safe-
guard 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.
This cleaning must only be performed by persons trained for this task. We recommend using a soft, damp cloth. Cleaning
agents that contain solvents must not be used.
PRK 55 ExRetro-reflective photoelectric sensors with polarization filter for bottles
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

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
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 in the scanning 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 scanning range, the sensor operates as an energetic diffuse reflection light scanner. Light objects can still be
reliably detected up to the scanning range limit.
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
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

Mounting instructions
1Protective housing
2a, 2b Distance bolts (mounted)
3Screw M3
4Washer
5a, 5b Mounting devices (e.g. UMS 25, BT 25, …)
6Plate BT 3
1. Place device in the pro-
tective 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 ExRetro-reflective photoelectric sensors with polarization filter for bottles
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

Declaration of Conformity
PRK 55 Ex
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]