Baumer OM20 User manual

V2 | 7/20/2021
EN-US
Operating Manual
OM20/OM30 IO-Link
Laser distance sensor

List of contents Baumer
ii Operating Manual OM20/OM30 IO-Link | V2
List of contents
1 About this document................................................................................................................................... 4
1.1 Purpose ................................................................................................................................................ 4
1.2 Warnings in this manual ....................................................................................................................... 4
1.3 Labels in this manual ............................................................................................................................ 5
1.4 Liability limitation................................................................................................................................... 5
1.5 Name plate ........................................................................................................................................... 5
1.6 Scope of delivery .................................................................................................................................. 5
2 Safety............................................................................................................................................................ 7
2.1 Personnel requirements........................................................................................................................ 7
2.2 General information .............................................................................................................................. 7
2.3 Laser..................................................................................................................................................... 8
3 Description................................................................................................................................................... 9
3.1 Structure ............................................................................................................................................... 9
3.2 General functionality ............................................................................................................................. 9
3.3 Measurement field ................................................................................................................................ 10
3.4 Operating and display elements ........................................................................................................... 11
3.4.1 Sensor LEDs........................................................................................................................... 11
3.4.2 Teach button ........................................................................................................................... 11
3.5 Analog measurement performance ...................................................................................................... 13
3.5.1 Interpretation of the characteristic curves ............................................................................... 13
3.6 IO-Link .................................................................................................................................................. 14
3.7 Dimensional drawing ............................................................................................................................ 17
4 Transport and storage ................................................................................................................................ 18
4.1 Transport .............................................................................................................................................. 18
4.2 Delivery inspection................................................................................................................................ 18
4.3 Storage ................................................................................................................................................. 18
5 Installation instructions .............................................................................................................................. 19
6 Electrical installation................................................................................................................................... 22
6.1 Pin assignment ..................................................................................................................................... 22
6.2 Connection diagram.............................................................................................................................. 22
6.3 Connecting the sensor to electricity...................................................................................................... 22
7 Commissioning............................................................................................................................................ 23
7.1 Factory settings .................................................................................................................................... 23
7.2 Setting up IO-Link ................................................................................................................................. 23
8 Functions ..................................................................................................................................................... 24
8.1 Filter...................................................................................................................................................... 24
8.2 Trigger mode ........................................................................................................................................ 27

Baumer List of contents
V2 | OM20/OM30 IO-Link Operating Manual iii
8.3 Zero position ......................................................................................................................................... 28
8.4 Measurement range.............................................................................................................................. 28
8.5 Invalid Value Handling .......................................................................................................................... 29
8.6 Switching points.................................................................................................................................... 31
8.7 Polarity.................................................................................................................................................. 32
8.8 Hysteresis ............................................................................................................................................. 33
8.9 Function of the output ........................................................................................................................... 35
8.10 Analog measurement field .................................................................................................................... 36
8.11 Function of the Teach button ................................................................................................................ 38
9 Diagnostic data............................................................................................................................................ 39
9.1 Measurement rate................................................................................................................................. 39
9.2 Response delay .................................................................................................................................... 40
9.3 Exposure reserve.................................................................................................................................. 40
9.4 Signal quality ........................................................................................................................................ 41
9.5 Device status ........................................................................................................................................ 41
9.6 Operating time ...................................................................................................................................... 41
9.7 Histogram function................................................................................................................................ 42
10 Maintenance................................................................................................................................................. 45
10.1 Cleaning the sensor.............................................................................................................................. 45
11 Troubleshooting .......................................................................................................................................... 46
11.1 Return and repair.................................................................................................................................. 46
11.2 Accessories .......................................................................................................................................... 46
12 Annex............................................................................................................................................................ 47
12.1 Analog output resolution - diagrams ..................................................................................................... 47

1 | About this document Baumer
4 Operating Manual OM20/OM30 IO-Link | V2
1 About this document
1.1 Purpose
This operating manual (subsequently referred to as manual) allows the safe and efficient han-
dling of the product .
The manual does not provide instructions on operating the machine in which the product is inte-
grated. Information on this is found in the operating manual of the machine.
The manual is a constituent part of the product. It must be kept in the immediate vicinity of the
product and must be accessible to personnel at all times.
Personnel must have carefully read and understood this manual before beginning any work.
The basic prerequisite for safe working is compliance with all safety instructions and handling
instructions given in this manual.
In addition, the local occupational health and safety regulations and general safety regulations
apply.
The illustrations in this manual are examples only. Deviations are at the discretion of Baumer at
all times.
1.2 Warnings in this manual
Warnings draw attention to injury or material damage. The warnings in this manual indicate dif-
ferent hazard levels:
Symbol Warning term Explanation
DANGER Indicates an immediate danger with high risk that will lead to death
or serious injury if not avoided.
WARNING Indicates a possible danger with medium risk that may lead to
death or (serious) injury if not avoided.
CAUTION Indicates a danger with low risk that could lead to slight or medium
injury if not avoided.
NOTE Indicates a warning of material damage.
INFO Indicates practical information and tips that enable optimal use of
the devices.

Baumer About this document | 1
V2 | OM20/OM30 IO-Link Operating Manual 5
1.3 Labels in this manual
Identifier Use Example
Dialog element Indicates dialog elements. Click the OK button.
Unique name Indicates the names of products,
files, etc.
Internet Explorer is not supported
in any version.
Code Indicates entries. Enter the following IP address:
192.168.0.250
1.4 Liability limitation
All information and notes in this manual have been compiled in accordance with the applicable
standards and regulations, the state of the art, and our many years of knowledge and experi-
ence.
The manufacturer accepts no liability for damage due to the following reasons:
nNon-observance of the manual
nImproper use
nUse of unqualified personnel
nUnauthorized conversions
The obligations agreed in the delivery contract, the general terms and conditions and the deliv-
ery conditions of the manufacturer and its suppliers, as well as the legal regulations valid at the
time of conclusion of the contract apply.
1.5 Name plate
Swiss made
1
2
3
Ill.1: Name plate
1 Short item name (OMxx item number) 2 Production date
3 Serial number
1.6 Scope of delivery
The scope of delivery includes:
n1 x sensor
n1 x Quickstart
n1 x general information leaflet

1 | About this document Baumer
6 Operating Manual OM20/OM30 IO-Link | V2
In addition, you can find the following information, among other things, in digital format at
www.baumer.com:
nOperating manual
nData sheet
n3D CAD drawing
nQuickstart
nDimensional drawing
nConnection diagram & pin assignment
nIODD file
nCertificates (EU conformity declaration, etc.)

Baumer Safety | 2
V2 | OM20/OM30 IO-Link Operating Manual 7
2 Safety
2.1 Personnel requirements
Certain work with the product may only be carried out by specialized personnel.
Specialized personnel are staff members who can evaluate the tasks assigned to them and rec-
ognize potential danger, based on their training and work as well as a reliable understanding of
technical safety issues.
Qualified personnel are divided into the following categories:
nInstructed personnel:
A person who has been informed and, if required, trained, by a specialist about the assigned
tasks and potential dangers of improper behavior.
nSpecialist:
A person who, based on his/her training, experience, and instruction, as well as his/her
knowledge of applicable standards, rules, and accident prevention regulations, has been au-
thorized to carry out the respectively required tasks, while recognizing and avoiding poten-
tial dangers.
nElectrical specialist:
A person with the appropriate specialist training, knowledge, and experience allowing him/
her to recognize and avoid dangers originating from electricity.
2.2 General information
Instructions for appropriate use
This product is a precision device designed for the detection of objects, the acquisition of physi-
cal measuring units and for the evaluation of measured values for output in the form of electrical
signals for the higher-level system.
Unless not especially labelled, the product must not be used in potentially explosive atmos-
pheres.
Set-up
Installation, mounting and adjustment of this product may only be executed by skilled and au-
thorised personnel.
Mounting
Only use the fasteners and fastener accessories intended for this product for installation. Out-
puts not in use must not be wired. Unused wires of cable outputs must be insulated. Do not go
below the permissible cable bending radii. Disconnect the system from power before the prod-
uct is electrically connected. Use shielded cables to prevent electro-magnetic interference. If the
customer assembles plug connections on shielded cables, then EMC-version plug connections
should be used and the cable shield must be connected to the plug housing across a large sur-
face area.
Disposal (environmental protection)
Do not dispose of electrical and electronic equipment in household waste. The
product contains valuable raw materials for recycling, which is why the old prod-
uct must be returned to an authorised collecting point for correct disposal/recy-
cling. For further information see www.baumer.com.

2 | Safety Baumer
8 Operating Manual OM20/OM30 IO-Link | V2
2.3 Laser
CLASS 1 LASER
PRODUCT
IEC 60825-1/2014
Complies with 21 CFR 1040.10 and
1040.11 except for conformance with
IEC 60825-1 Ed. 3., as described in
Laser Notice No. 56, dated May 8, 2019
Products with the following type codes are specified according to laser class 1:
OM20-xxxxx.HH.xxx
OM30-xxxxx.HH.xxx
LASER RADIATION
DO NOT STARE INTO BEAM
Wavelength: 640...670nm
IEC 60825-1, Ed. 3, 2014
CLASS 2 LASER PRODUCT
Complies with 21 CFR 1040.10 and 1040.11
except for conformance with IEC 60825-1 Ed. 3.,
as described in Laser Notice No. 56, dated May 8, 2019
Products with the following type codes are specified according to laser class 2:
OM20-xxxxx.HV.xxx
OM30-xxxxx.HV.xxx

Baumer Description | 3
V2 | OM20/OM30 IO-Link Operating Manual 9
3 Description
3.1 Structure
2
1
3
4
5
OM20 OM30
2
3
1
4
5
Ill.2: Structure OM20/OM30
1 Sensor LEDs 2 Front panel
3 Teach button 4 M8 plug, 4-pin
5 Imprint of laser information & name plate
3.2 General functionality
The sensor measures the distance to an object to be measured by angle calculation (triangula-
tion principle). For this purpose, the sensor projects a laser point on the object to be measured.
This laser point is mapped on the receiver element by the receiving optics. The distance to the
object to be measured is calculated from the location of the image on the receiver element. The
measured distance is provided as a measured value via the following channels integrated in the
sensor:
nDigital IO-Link interface
nAnalog output
The following options are available to you for parameterizing the sensor:
nIO-Link parameter
nTeach button on the sensor

3 | Description Baumer
10 Operating Manual OM20/OM30 IO-Link | V2
3.3 Measurement field
INFO
The data for your sensor version can be found in the data sheet.
MR
Sdc
Sde
ZP
ZP Zero position MR Measuring range
Sdc Start of the measuring range Sde End of the measuring range
Measuring range (MR)
nRegion in which the measurement object must be present for the sensor to deliver reliable
measurement results.
nUnwanted objects (objects not to be measured) in this region may lead to deviations in the
measurement results.
nThe limits of the measurement range (MR) are defined via the parameters Start of the mea-
surement range (Sdc) and End of the measurement range (Sde).
Zero position (ZP)
nIn the factory settings, the zero point is located on the front of the sensor (ZP=0mm). The
output consists of the distance between the front of the sensor and the measurement object.
nThe following values depend on the zero position:
▪ Output measured values
▪ Analog value
▪ Switching points
nCapable of parameterization via:
▪ IO-Link
▪ Teach button

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V2 | OM20/OM30 IO-Link Operating Manual 11
3.4 Operating and display elements
3.4.1 Sensor LEDs
Des. Illuminated Blinking
POWER Green Sensor ready for operation -
OUTPUT Yellow No valid signal within the measurement
range
Critical signal quality
In the factory settings, the OUTPUT (pin4), and thus also the yellow LED, follows the function
of the alarm output. Alternatively, you can select the function of the switching output for the
OUTPUT and the yellow LED.
3.4.2 Teach button
Instead of parameterizing the sensor via the IO-Link, you can configure the sensor via the
Teach button. Adjustable parameters:
nAnalog measurement field
nZero position
nResetting the sensor to the factory settings
INFO
You have the additional option of adjusting the mode of the Teach button via IO-Link. You have
a choice between Xpert (factory setting) and Xpress mode. For more information, see Function
of the Teach button [}38].
The teach button is automatically deactivated after 5 min (the timeout can be parameterized via
IO-Link). When the teach button is pressed for longer than 12seconds, the sensor enters oper-
ating mode without performing a parameterization.
Parameterization via the Teach button is done according to the procedure described in the fol-
lowing.
Teaching the analog measurement field
Instruction:
a) Press the teach button briefly.
üGreen and yellow LEDs light up (teach button is active). If the LEDs do not light up, start
the sensor again.
b) Keep the teach button pressed for 4 seconds.
üYellow LED blinks with 2Hz.
c) Place the measurement object on position 1 (P1) and briefly press the teach button within
60 seconds.
üThe min. limit of the analog measurement range has been taught in (distance at which
the min. voltage or min. current is displayed).
d) Place the measurement object on P2 and briefly press the teach button within 60 seconds.
üThe max. limit of the analog measurement range has been taught in (distance at which
the max. voltage or max. current is displayed).
Result:
üTeach-in OK: Green and yellow LEDs light up briefly. Afterwards, the sensor returns to oper-
ating mode.
üTeach-in not OK: Green and yellow LEDs blink simultaneously with 8 Hz.

3 | Description Baumer
12 Operating Manual OM20/OM30 IO-Link | V2
NOTICE
The characteristic curve of the analog output can be inverted by the teaching process (negative
gradient). To do this, teach in the maximum distance for P1 and the minimum distance for P2.
Sdc Sde
ZP
Analog
measurement field
P2 P1
Ill.3: Analog measurement field (inverted)
Teaching the zero position
a) Press the teach button briefly.
üGreen and yellow LEDs light up (teach button is active). If the LEDs do not light up, start
the sensor again.
b) Keep the teach button pressed for 2 seconds.
üGreen LED blinks with 2 Hz.
c) Place the measurement object on the desired position for the zero point and briefly press
the teach button within 60 seconds.
Result:
üTeach-in OK: Green and yellow LEDs light up briefly. Afterwards, the sensor goes back to
operating mode.
üTeach-in not OK: Green and yellow LEDs blink simultaneously with 8 Hz.
After the zero point is shifted,
nthe digital measured values before the zero point (in the direction of the sensor) are output
as negative and those after the zero point are output as positive measured values.
nthe limits of the analog measurement field have shifted. Therefore, parameterize the analog
measurement field again.
Sdc SdeZP
Analog
measurement field
P1 P2
-+
Resetting to the factory settings
a) Press the teach button briefly.
üGreen and yellow LEDs light up (teach button is active). If the LEDs do not light up, start
the sensor again.
b) Keep the teach button pressed for 8 seconds.
üYellow and green LEDs blink simultaneously with 2Hz.
Result:
üTeach-in OK: Green and yellow LEDs light up briefly. Afterwards, the sensor goes back to
operating mode.
üTeach-in not OK: Yellow and green LEDs blink simultaneously with 8 Hz.

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V2 | OM20/OM30 IO-Link Operating Manual 13
3.5 Analog measurement performance
The sensor's analog output features 12-bit resolution. Such resolution may limit the precision of
the analog current or voltage values. For this reason, the analog measuring field should be re-
stricted to the measuring range relevant for the application. This can be done via the teach but-
ton or the IO-Link interface.
INFO
For all laser distance sensors, the precision decreases with increasing measuring distance. For
this reason, the resolution of the analog output limits the repeatability of the analog measure-
ment results, especially at close range.
a) To achieve the highest possible precision, measure in the close range of the sensor and
limit the analog measuring field to as small an area as possible.
Also see about this
2Analog measurement field [}36]
2Teach button [}11]
3.5.1 Interpretation of the characteristic curves
The diagrams in the appendix of this documentation show how the resolution of the analog out-
put limits the precision of the measurement.
Example
In this example, the repeatability of the sensor is specified as 1 µm at the beginning of the mea-
suring range to 3 µm at the end of the measuring range. This precision can be achieved at the
analog output by narrowing the analog measuring field to 3 mm.

3 | Description Baumer
14 Operating Manual OM20/OM30 IO-Link | V2
The following statements can be derived from the graph:
nNo containment of the analog output (i.e. Sr = 50 mm - gray characteristic line) limits the
precision at the analog output to 16 µm.
nHowever, if the analog measuring range is narrowed down to 3 mm or smaller (dark blue
characteristic curve), the best possible precision of the sensor can be achieved at any dis-
tance in the measuring range. This is 1 µm to 3 µm.
Interpretation in detail
1. Analog measuring field = 50 mm:
If the analog measuring field is not restricted, the resolution of the analog output limits the
repeatability of the sensor to 16 µm. The gray characteristic curve shows the limitation of the
performance.
2. Analog measuring field = 30 mm:
If the analog measuring field is limited to 30 mm, the resolution of the analog output limits
the repeatability of the sensor to 10 µm. The black characteristic curve shows the limitation
of the performance.
3. Analog measuring field = 10 mm:
If the analog measuring field is limited to 10 mm, the resolution of the analog output limits
the repeatability of the sensor to 3 µm. The light blue characteristic curve shows the limita-
tion of the performance.
4. Analog measuring field = < 3 mm:
If the analog measuring field is restricted to < 3 mm measuring range, the resolution of the
analog output over the entire measuring range does not limit the repeatability. The dark blue
characteristic curve shows the best possible repeatability from 1 µm to 3 µm of the sensor.
Also see about this
2Analog output resolution - diagrams [}47]
3.6 IO-Link
The IO-Link distinguishes between the following types of data:
nProcess data
nParameter
nDiagnostic data
Process data
Process data are cyclical data that are transmitted in the IO-Link communication mode with
each query cycle. An explicit query of the data is not necessary. The following process data are
available for the sensor:
nOutput:
▪ Find me (localizing the sensor by activating the LEDs)
▪ Laser on/off
nInput:
▪ Measured value
▪ Scale of the measured value
▪ Status of the alarm output
▪ Status of the signal quality
▪ Status of the switching output

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V2 | OM20/OM30 IO-Link Operating Manual 15
IO-Link process data: Output
Sub-
Index
Bit-
Offset Denotation Data type Description
1 1 Find me Boolean nSwitch the laser on/off.
2 0 Laser ON/ OFF Boolean nLocalize the sensor by activating the
LEDs.
IO-Link process data: input
Sub-
Index
Bit-
Offset Denotation Data type Description
1 16 Distance (MDC) 32 Bit Integer nMeasured value
2 8 Scale 8 Bit Integer nScale of the measured value
nThe transmitted scale value corre-
sponds to exponents of 10
(i.e.:10Scale).
nFormula for calculating the measure-
ment value:
▪ Measurement value (MDC I) × 10Scale
× Unit
nExample:
▪ Measurement value (MDC): 1000
▪ Scale: -6
▪ Unit: m
▪ Therefore: 1000 × 10-6 × m = 1000
µm
7 3 Output Boolean nStatus of the alarm output
▪ Bit 3 = 0: Alarm is inactive. Sensor is
functioning as required.
▪ Bit 3 = 1: Alarm is active. The sen-
sor must be checked. No measured
value can be recorded.
8 2 Quality Bit Boolean nStatus of the signal quality.
▪ Bit 2 = 0: Signal quality is sufficient
for a valid measurement.
▪ Bit 2 = 1: Signal quality is insuffi-
cient. The sensor must be checked
(e.g. for soiling).
10 0 SSC1
(Switching Signal
Channel 1)
Boolean nStatus of the switching output.
▪ Bit 0 = 0: Switching output is inac-
tive.
▪ Bit 0 = 1: Switching output is active.
IMDC = Measurement Data Channel

3 | Description Baumer
16 Operating Manual OM20/OM30 IO-Link | V2
Parameter
Parameters are acyclic data (transmission occurs as needed). The following parameters are
available for the sensor:
nFilters for smoothing the signal characteristics
nTriggers for recording the measured value
nProcessing of invalid measured values
nSwitching points
nPolarity (output level of the switching output)
nHysteresis
nZero position
nLimits of the measurement range
nLimits of the analog measurement field
nOutput & LED (alarm/switching output)
nConfiguration of the Teach button
Diagnostic data
The diagnostic data is used for monitoring the status of the device. The following diagnostic
data is available for the sensor:
nMeasurement rate
nReply delay
nExposure reserve
nSignal quality
nDevice status
nOperating time
nHistogram function
For a detailed description of the IO-Link functions, see Functions [}24]. For a detailed descrip-
tion of the diagnostic data, see Diagnostic data [}39].

Baumer Description | 3
V2 | OM20/OM30 IO-Link Operating Manual 17
3.7 Dimensional drawing
13
34,5
37
M8 x 1
2,9 11,2 19
31,6
LED
Teach-in
26
3,2
3
2,2
2
7,7
Ill.4: Dimensional drawing OM20
13,6
49
4,2
3,9 41
M8 x 1
6,429
40,3
Teach-in
LED
2
9,7
Ill.5: Dimensional drawing OM30

4 | Transport and storage Baumer
18 Operating Manual OM20/OM30 IO-Link | V2
4 Transport and storage
4.1 Transport
NOTICE
Material damage due to improper transport.
a) Practice the greatest diligence when unloading the delivery packages and when transporting
them within the company.
b) Note the information and symbols on the packaging.
c) Only remove packaging immediately before installation.
4.2 Delivery inspection
Upon receipt, immediately inspect the delivery for completeness and transport damage.
Claim any defect as soon as it is detected. Damages can only be claimed within the applicable
claims deadlines.
In case of externally visible transport damage, proceed as follows:
Instruction:
a) Do not accept the delivery or only with reservations.
b) Note the scope of the damage on the transport documents or the delivery slip of the carrier.
c) Initiate the claim.
4.3 Storage
Store the product at the following conditions:
nDo not store outdoors.
nStore dry and free from dust.
nDo not expose to aggressive media.
nKeep away from the sun.
nAvoid mechanical agitation.
nStorage temperature: -10 ... +60 °C
nAmbient humidity: 20 ... 85 %
nWhen storing for longer than 3 months, regularly check the general state of all parts and the
packaging.

Baumer Installation instructions | 5
V2 | OM20/OM30 IO-Link Operating Manual 19
5 Installation instructions
INFO
You can find the suitable installation accessories on the Baumer website. Go to
www.baumer.com for this. Then enter the item number of the sensor in the search field of the
website.
nFor measurement objects with shiny surfaces: Tilt the sensor 6 to 10° to the side so that the
light directly reflected by the surface does not hit the receiver of the sensor.
nFor mounting, use at least 1 tooth lock washer to break open the paint layer of the sensor.
OM20 OM30
Screws: 2 × M3 2 × M4
Torque: 0.6Nm±10% 1Nm±10%
üû
Mounting the sensor near a wall or a machine component:
Mount the sensor parallel to the wall to prevent disruptive reflections.
üû
Measurement objects with height differences / measurements in holes or cracks:
Mount the sensor in such a way that the reception beam is not interrupted by the step.

5 | Installation instructions Baumer
20 Operating Manual OM20/OM30 IO-Link | V2
üû
Mounting for measuring objects with colored edges / different reflective characteristics of the
surface:
Align the sensor parallel to the colored edge to prevent measurement errors.
üû
Mounting near strong ambient light:
Prevent the ambient light from entering the detection range of the receiver.
üû
Mounting several sensors close to each other:
Prevent the detection ranges of the receivers from overlapping. Only the sensor’s own laser
spot may be in the detection range of the receiver.