Specifications and description

HRTL 3B Laser diffuse reflection light scanner with background suppression

Dimensioned drawing
en 03-2013/08 50114049

10 … 400(500)mm
170(250)mm with
black/white error < 10%

10 - 30 V
DC 2 kHz
A2 LS

 Laser diffuse reflection light scanner with

visible red light and adjustable background
suppression
 Exact scanning range adjustment through
8-turn potentiometer
 Collimated light beam propagation with
small beam diameter permits identical
switching behavior within the specified
scanning range
 Standard device in laser class 1 in accor- A Green indicator diode
dance with EN 60825-1; extended B Yellow indicator diode
scanning area with excellent black/white C Receiver
ratio in laser class 2 D Transmitter
 High switching frequency and short E Optical axis
response time for fast events and high- F 8-turn potentiometer for scanning range adjustment
precision applications G Mounting sleeve
We reserve the right to make changes • DS_HRTL3B_en_50114049.fm

Electrical connection
IP 67
Plug connector, 4-pin Cable, 4-wire

IEC 60947... IEC 60947...

Accessories:
(available separately)
Plug connector, 3-pin
 Mounting systems (BT 3…)
 Cable with M8 or M12 connector (K-D …)

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. +49 (0) 7021 573-0 HRTL 3B… - 03
info@leuze.com • www.leuze.com
 HRTL 3B

Specifications Tables
Models of laser class 1:
Optical data Laser class 1 Laser class 2
1) 1 15 400
Typ. scanning range limit 10 … 400mm 5 … 500mm
2 15 250
Scanning range 2) see tables
Adjustment range of the switching point 20 … 400mm 20 … 500mm 3 15 170
Black/white error < 10% up to 170mm 250mm Models of laser class 2:
Light beam diameter approx. 1 mm, consistent
Light beam characteristic collimated 1 15 500
Squint angle typ. ± 2° 2 15 400
Light source 3) laser, pulsed 3 15 250
Wavelength 650nm (visible red light)
Max. output power ≤ 0.81mW ≤ 3.3mW 1 white 90%
Pulse duration 7μs 7.6μs 2 gray 18%
3 black 6%
Timing
Switching frequency 2,000Hz
Scanning range [mm]
Response time 0.25ms
Response jitter typ. 65μs
Decay time
Delay before start-up
0.25ms
≤ 300ms
Diagrams
Electrical data Models of laser class 1:
Operating voltage UB 4) 10 … 30VDC (incl. residual ripple) Typ. black/white behavior
Residual ripple ≤ 10% of UB 200
Open-circuit current ≤ 20mA A

Red. of scan range y [mm]

175
B
Switching output …/66 5) 2 push-pull switching outputs 150 C
pin 2: PNP dark switching, NPN light switching 125
pin 4: PNP light switching, NPN dark switching 100
…/6 5) 1 push-pull switching output 75
pin 4: PNP light switching, NPN dark switching 50
Signal voltage high/low ≥ (UB -2V)/≤ 2V 25
Output current max. 100mA 0
0 50 100 150 200 250 300 350 400
Scanning range adjustable via 8-turn potentiometer Scanning range x [mm]
Indicators
Green LED ready Models of laser class 2:
Yellow LED object detected - reflection Typ. black/white behavior
45
Mechanical data 40 A

Red. of scan range y [mm]

Housing 6) plastic (PC-ABS); 1 attachment sleeve, nickel-plated steel 35
B
C
Color red RAL 3000 30
Optics cover plastic (PMMA) 25
Fastening through-holes for 2 x M3 20
Weight with connector: 20g 15
with 200mm cable and connector: 40g 10
5
with 2m cable: 50g
0
Connection type 2m cable (cross section 4x0.20mm²), 0 50 100 150 200 250 300 350 400
connector M8 metal, Scanning range x [mm]
0.2m cable with connector M8 or M12
Environmental data A white 90%
Ambient temp. (operation/storage) -30°C … +55°C / -40°C … +70°C B gray 18%
Protective circuit 7) 1, 2, 3 C black 6%
VDE safety class III
Protection class IP 67 y
Laser class 1 in accordance with 2 in accordance with
EN 60825-1:2007 EN 60825-1:2007 x
Standards applied IEC 60947-5-2
Certifications UL 508 4)

1) Typ. scan. range limit/adjustment range: max. achievable scanning range/adjustment range for light objects
(white 90%)
Remarks
2) Scanning range: recommended scanning range for objects with different diffuse reflection Mounting system:
3) Average life expectancy 50,000h at an ambient temperature of 25°C
4) For UL applications: for use in class 2 circuits according to NEC only
5) The push-pull switching outputs must not be connected in parallel
6) Patent Pending Publ. No. US 7,476,848 B2
7) 1=overload protection, 2=polarity reversal protection, 3=short circuit protection for all transistor outputs Œ  Ž

Remarks
Adapter plate: BT 3.2 (part no. 501 03844) for alternate mounting on 25.4mm hole
spacing (Omron E3Z, Sick W100…)
Π= BT 3
(part no. 50060511)
+Ž = BT 3.1 1)
(part no. 50105585)
Œ++Ž = BT 3B
(part no. 50105546)

1) Packaging unit: PU = 10 pcs.

HRTL 3B… - 03 2013/08

HRTL 3B Laser diffuse reflection light scanner with background suppression

Part number code

H R T L 3 B / 6 6 . C 2 , 2 0 0 a S 8 . 3
-

Operating principle
HRT Diffuse reflection light scanners with background suppression

Operating principle
L Laser (red light)

Construction/version
3B Series 3B

Switching output/function (OUT 1: pin 4, OUT 2: pin 2)

/66 2 x push-pull transistor output, OUT 1: light switching, OUT 2: dark switching
/6 1 x push-pull transistor output, OUT 1: light switching, OUT 2: not connected (n. c.)

Equipment
N/A Laser class 1 in accordance with EN 60825-1
.C2 Laser class 2 in accordance with EN 60825-1

Electrical connection
N/A Cable, PVC, standard length 2000mm, 4-wire
-S8.3 M8 connector, 3 pin (plug)
-S8 M8 connector, 4 pin (plug)
,200-S8.3 Cable, PVC, length 200mm with M 8 connector, 3 pin, axial (plug)
,200-S8 Cable, PVC, length 200mm with M 8 connector, 4 pin, axial (plug)
,200-S12 Cable, PVC, length 200mm with M 12 connector, 4 pin, axial (plug)

Order guide
The sensors listed here are preferred types; current information at www.leuze.com

Order code Part no.

HRTL 3B/66 50114760
HRTL 3B/66-S8 50114581
HRTL 3B/66, 200-S8 50114761
HRTL 3B/66, 200-S12 50114762
HRTL 3B/66-C2 50114763
HRTL 3B/66-C2-S8 50114582
HRTL 3B/66-C2, 200-S8 50114764
HRTL 3B/66-C2, 200-S12 50114765

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. +49 (0) 7021 573-0 HRTL 3B… - 03
info@leuze.com • www.leuze.com
 HRTL 3B

Application notes

 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.
 Laser class 2 warning signs:
It is important to attach the stick-on labels delivered with the device! If the signs could be covered due to the instal-
lation location of the device, attach them close to the device so that it is not possible to look into the laser beam
when reading the notices.

 Detection of glossy surfaces within the scanning range:

When detecting glossy surfaces (e.g. metals), the light beam should not hit the object surface at a right angle. A
slight inclination suffices to prevent undesirable direct reflections. The following rule of thumb applies: the smaller
the scanning range, the larger the angle of the inclination (approx. 5° … 7°).

Slight inclination
5° … 7°

Glossy object surface within the scanning range

 Avoiding interference from glossy surfaces in the background:

If a glossy surface is in the background (distance larger than scanning range limit), reflections may cause interfering
signals. These may be avoided by mounting the device at a slight angle (see figure below).

Attention!
It is imperative to note the task and the associated inclination of the scanner of approx. 5° … 7°.

Slight inclination
5° … 7°
Scanning range limit

Glossy surface in the background

 Objects should only be moved in laterally from the right or left. Moving in objects from the connection 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.

HRTL 3B… - 03 2013/08

HRTL 3B Laser diffuse reflection light scanner with background suppression

Object detection behind diaphragms

It is sometimes necessary to mount the sensor behind plant parts so that the light beam has to pass through an opening
(diaphragm) that is as small as possible. Here, the detection depends, among other things, on set scanning range tw, distance a
between diaphragm and sensor, and diaphragm diameter d. Here are some reference values 1):

Diaphragm diameter d [mm], dependent on

scanning range tw [mm] on a white object (90% diffuse reflection)
set on the sensor
Distance a [mm] between
sensor and diaphragm tw = 100 tw = 200 tw = 300
10 10 10 10
30 8 8 9
50 7 8 9
80 6 7 8
100 6 6 8
120 6 8
150 5 6
180 5 6
200 5 6

Diaphragm
Alignment of the light beam within the diaphragm
Sensor Diaphragm diameter d

Diaphragm (Ø d)

Scanning range tw

Light beam (Ø approx. 1mm)

Object

Distance
a

Detection of smallest objects

The laser scanner can also detect very thin parts (e.g., sheet metal plates or wire). Detection here depends, among other things,
on set scanning range tw, distance a to the object, and object size/thickness d.

Set scanning range tw = 50 … 200mm

Sensor
Reference value 1) for
object thickness:
d ≥ 150μm

Distance a

1) Reference values are not guaranteed properties. Due to the

multitude of possible influencing factors, they must be confirmed
in the application.

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. +49 (0) 7021 573-0 HRTL 3B… - 03
info@leuze.com • www.leuze.com
 HRTL 3B

HRTL 3B… - 03 2013/08