UM18-2 Pro
Ultrasonic sensors
OPERATING INSTRUCTIONS
Described product UM18-2 Pro
Manufacturer SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
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© SICK AG. All rights reserved.
2 © SICK AG • Subject to change without notice • 8014865/ZUJ3/2018-11-29
Table of contents
Table of contents
1 General information ........................................................................... 7
1.1 Information regarding the operating instructions ....................7
1.2 Explanation of symbols .............................................................7
1.3 Limitation of liability ..................................................................8
1.4 Scope of delivery .......................................................................8
1.5 Customer service ....................................................................... 8
1.6 EU declaration of conformity .....................................................8
2 Safety .................................................................................................. 9
2.1 Correct use ................................................................................. 9
2.2 Improper use ..............................................................................9
2.3 Requirements for skilled persons and operating personnel 10
3 Identication .................................................................................... 11
3.1 Type label ................................................................................ 11
3.2 Type code ................................................................................ 12
4 Structure and function .................................................................... 13
4.1 Structure and status indicators ............................................. 13
4.2 Function ................................................................................... 14
5 Mounting .......................................................................................... 15
5.1 Mounting the ultrasonic sensor ............................................. 15
5.2 Smooth object surfaces ......................................................... 15
5.3 Mounting multiple ultrasonic sensors ................................... 16
5.3.1 Minimum mounting distances ............................... 16
5.3.2 Synchronization mode ............................................ 16
5.3.3 Multiplex mode ....................................................... 17
6 Electrical connection ..................................................................... 19
6.1 Safety ....................................................................................... 19
6.2 Wiring notes ............................................................................ 19
6.3 Connecting the ultrasonic sensor electrically ....................... 20
6.4 Connection diagrams ............................................................. 21
6.4.1 Ultrasonic sensors with switching outputs ............ 21
6.4.2 Ultrasonic sensors with analog outputs ................ 22
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Table of contents
7 Commissioning ................................................................................ 23
7.1 Ultrasonic sensors with switching outputs ............................ 23
7.1.1 Teach-in the switching point – method A .............. 23
7.1.2 Teach-in the switching point – method B .............. 23
7.1.3 Teach-in the window ............................................... 24
7.1.4 Teach-in the background ........................................ 24
7.1.5 Conguring as normally open or normally closed . 25
7.2 Ultrasonic sensors with an analog output ............................ 25
7.2.1 Conguring the scaling of the analog output ....... 25
7.2.2 Conguring the rising or falling output
characteristic curve ................................................ 26
7.3 Additional settings for all sensor models .............................. 26
7.3.1 Switching between teach-in and synchronization/
multiplex mode ....................................................... 26
7.3.2 Resetting the settings to the factory setting ......... 27
7.4 Temperature compensation ................................................... 28
7.5 Measured value lter .............................................................. 29
8 IO-Link interface .............................................................................. 32
8.1 Physical layer .......................................................................... 32
8.2 Process data ........................................................................... 33
8.3 Service data ............................................................................ 33
8.3.1 IO-Link-specic ........................................................ 33
8.3.2 SICK-specic UM18-21712A21_ .......................... 34
8.3.3 SICK-specic UM18-21712A21_ .......................... 35
8.3.4 SICK-specic UM18-21212A21_ .......................... 36
8.3.5 SICK-specic UM18-21812A21_ .......................... 37
8.4 Error Codes ............................................................................. 38
9 Cleaning and maintenance ............................................................. 39
9.1 Cleaning .................................................................................. 39
9.2 Maintenance ........................................................................... 39
10 Troubleshooting ............................................................................... 40
10.1 Possible fault indicators ......................................................... 40
10.2 Disposal ................................................................................... 40
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Table of contents
11 Technical data .................................................................................. 41
11.1 Dimensions ............................................................................. 41
11.2 Optics/Performance ............................................................... 42
11.3 Power supply ........................................................................... 43
11.3.1 Sensors with switching outputs ............................. 43
11.3.2 Sensors with analog outputs ................................. 43
11.4 Inputs ....................................................................................... 43
11.5 Outputs .................................................................................... 43
11.5.1 Sensors with switching outputs ............................. 43
11.5.2 Sensors with analog outputs ................................. 44
11.6 Interfaces ................................................................................ 44
11.7 Ambient conditions ................................................................. 45
11.8 Structural design .................................................................... 45
11.9 "Detection zone" diagrams ..................................................... 46
12 Accessories ...................................................................................... 48
12.1 "Connect+ Adapter" (CPA) ...................................................... 48
13 CongurationOverview ................................................................... 49
13.1 Conguration overview for sensors with switching outputs . 49
13.2 Conguration overview for sensors with analog outputs ..... 49
13.3 Additional settings for all sensors ......................................... 50
Index .......................................................................................................... 51
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General information
1 General information
1.1 Information regarding the operating instructions
These operating instructions supplement the Quick start guide and contain
additional information and detailed descriptions for using SICK AG's
UM18-2 Pro ultrasonic sensors. These operating instructions are intended
for specialists and electricians.
1.2 Explanation of symbols
Warnings Warnings in these operating instructions are indicated by symbols.
The warnings are introduced by signal words that indicate the extent of
the danger.
These warnings must be observed at all times and care must be taken to
avoid accidents, personal injury, and material damage.
DANGER!
… indicates a situation of imminent danger, which will
lead to a fatality or serious injuries if not prevented.
WARNING!
… indicates a potentially dangerous situation, which may
lead to a fatality or serious injuries if not prevented.
CAUTION!
… indicates a potentially dangerous situation, which may
lead to minor/slight injuries if not prevented.
IMPORTANT!
… indicates a potentially harmful situation, which may
lead to material damage if not prevented.
Tips and recommendations
NOTE!
… highlights useful tips and recommendations as well as
information for ecient and trouble-free operation.
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General information
1.3 Limitation of liability
Applicable standards and regulations, the latest state of technological
development and many years of knowledge and experience have all been
taken into account when assembling the data and information contained in
these operating instructions.
The manufacturer accepts no liability for damage caused by:
• Failing to observe the operating instructions
• Incorrect use
• Use by untrained personnel
• Unauthorized conversions
• Technical modications
• Use of unauthorized spare parts/wearing parts.
With special variants, where optional extras have been ordered, or owing to
the latest technical changes, the actual delivery may vary from the features
and illustrations shown here.
1.4 Scopeofdelivery
1.5 Customerservice
The scope of delivery includes the following:
• UM18-2 Pro ultrasonic sensor
• Optional: Accessories (→ Page 48, Chapter 12).
Supplied documentation:
• Quick start guide
Do not hesitate to contact our customer service should you require any
technical information.
Please refer to the back page of these operating instructions for your
agent's contact details.
NOTE!
Before calling, make a note of all type label data such as
type code, serial number etc. to ensure faster processing.
1.6 EU declaration of conformity
→ You can download the EU declaration of conformity online from
"www.sick.com/um18".
8 © SICK AG • Subject to change without notice • 8014865/ZUJ3/2018-11-29
2 Safety
2.1 Correct use
2.2 Improper use
Safety
The UM18-2 Pro is an ultrasonic sensor for non-contact detection of
objects, animals, and persons.
SICK AG assumes no liability for losses or damage arising from the use of
the product, either directly or indirectly. This applies in particular to use of
the product that does not conform to its intended purpose and is neither
described nor mentioned in this documentation.
The UM18-2 Pro ultrasonic sensor does not constitute a safety component
according to the EC Machinery Directive (2006/42/EC).
The UM18-2 Pro ultrasonic sensor must not be used in areas having
a danger of explosions.
Any other use that is not described as correct use is prohibited.
Never install or connect accessories if their quantity and composition are
not clearly specied, or if they have not been approved by SICK AG.
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Safety
2.3 Requirements for skilled persons and operating personnel
WARNING
Riskofinjuryduetoinsucienttraining!
Improper handling may result in considerable personal
injury and material damage.
For this reason:
• All activities should always be performed only by
designated persons.
These operating instructions list the training requirements for the various
elds of activity, as follows:
• Skilled personnel
Due to their specialist training, skills, and experience, as well as their
knowledge of the relevant regulations, such persons are able to perform
tasks delegated to them and detect any potential dangers on their own
initiative.
• Electricians
Due to their specialist training, skills, and experience, as well as their
knowledge of the relevant standards and provisions, such persons are
able to perform work on electrical systems and detect any potential
dangers on their own initiative.
In Germany, electricians must meet the specications of the BGV
A3 Work Safety Regulations (e.g. Master Electrician). Other relevant
regulations applicable in other countries must be observed.
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3 Identication
1
2354
3.1 Type label
The ultrasonic sensor includes the following type label:
POWERQ
D-79183 Waldkirch
Made in Germany
Fig. 1: UM18-2 Pro type label
1 Order number
2 Type designation
3 Information about output
4 Supply voltage
5 Serial number
Identication
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Identication
3.2 Type code
U M 1 8 – 2 1 7 1 2 A 2 1 1
1 2 3 4 5 6 7 8 9 10 11 12 13
Position Description
1 to 4
5
6
7
8 … 9
10
11
12
13
Table 1: Type code, UM18-2 Pro ultrasonic sensors
Product family
UM18
Generation
2 2. Generation
Principle of operation
1 Scanning principle
Detection range
7 20 mm … 150 mm, 250 mm
1 30 mm … 250 mm, 350 mm
2 65 mm … 350 mm, 600 mm
8 120 mm … 1000 mm, 1300 mm
Connectionandhousingversion
12 M12 plug, 5-pin, nickel-plated brass without display
Output function
A 1x Push-pull switching output
B 2x Push-pull switching output
6 1x Analog output 4 mA ... 20 mA
7 1x Analog output DC 0 V … 10 V
IO-Link
2 available
1 not available
Performance
1 Pro version
Alignment
1 Straight
2 Angled
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4 Structure and function
4
All dimensions in mm (inch)
1
4
(0.13)
1
4.1 Structure and status indicators
4
3
40.5 (1.59)
Structure and function
(0.16)
M18 x 1
2
25.5 (1.00)
2
(0.16)
3.4
3
4
16
41.5 (1.63)
56.5 (2.22)
68.5 (2.70)
Fig. 2: Structure: top "UM18-2xxxxxxx1 ultrasonic sensor"
bottom "UM18-2xxxxxxx2 ultrasonic sensor"
1 Connection
2 Mounting nuts, width across 24 mm
3 Supply voltage active LED status indicator (green)
4 Switching/analog output LED status indicator (orange)
(0.63)
M18 x 1
Status indicators (LEDs)
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Status display Description
Green Supply voltage
• Green LED: Supply voltage on
• LED o: Supply voltage o
Orange
Table 2: Status indicators (LEDs)
Switching/analog output
• LED orange: Switching output active/measured value
within analog output scaling
• LED o: Switching output inactive/measured value
outside analog output scaling
Structure and function
4.2 Function
The UM18-2 Pro is an ultrasonic sensor for performing non-contact
distance measurement or detection of objects, animals, and persons.
The circuit variations have the following operation modes: Distance to
Object (DtO), Window (Wnd), and Object between Sensor and Background
(ObSB). The measured distance value is transferred cyclically over an
IO-Link interface.
Depending on the model, the analog versions output a voltage or current
value corresponding to the measured distance value and the scaling on
the customer side.
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5 Mounting
1
2
5.1 Mounting the ultrasonic sensor
Mounting
NOTE!
Distance measurement is not possible within the blind
zone of the ultrasonic sensor. → See Page 42,
Chapter 11.2.
NOTE!
→ For mounting accessories, see Internet
"www.sick.com/um18", Accessories.
1. Select the mounting location for the ultrasonic sensor according to
the requirement. Keep in mind the specications in the technical
data, such as the detection range. → For dimensions, see Page 41,
Chapter 11.1. → For detection range, see Page 46, Chapter 11.9.
2. Insert the ultrasonic sensor through the hole in the mounting bracket.
3. Tighten mounting nuts using a maximum torque of 15 Nm.
5.2 Smooth object surfaces
For smooth object surfaces, we recommend an angle of 90° ± 3° between
the sensor axis and the object surface. A larger angle is possible for rough
surfaces.
≤ ± 3° ≥ ± 3°
Fig. 3: Alignment of the sensor for smooth and rough object surfaces
1 Alignment for smooth object surfaces
2 Alignment for rough object surfaces
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Mounting
5.3 Mounting multiple ultrasonic sensors
5.3.1 Minimum mounting distances
If you would like to operate multiple ultrasonic sensors and the mount-
ing distance is lower than the value specied in Table 3 (page 16), we
recommend using synchronization or multiplex mode. Synchronization or
multiplex mode avoids mutual interference between the sensors.
→ For synchronization mode, see Page 16, Chapter 5.3.2.
→ For multiplex mode, see Page 17, Chapter 5.3.3.
Minimum mounting distances
withoutsynchronizationmodeor
multiplex mode
Ultrasonic sensor Minimum distance for
parallel mounting
UM18-217x > 250 mm > 1300 mm
UM18-211x > 350 mm > 2500 mm
UM18-212x > 400 mm > 2500 mm
UM18-218x > 700 mm > 4000 mm
Table 3: Minimum mounting distances without synchronization mode or
multiplex mode
Minimumdistancewhen
devicesaremounted
opposite one another
5.3.2 Synchronizationmode
NOTE!!
The synchronization mode is not available in IO-Link
mode.
Descriptionofsynchronizationmode Synchronization mode begins automatically as soon as the sensors are
interconnected via PIN 5 (MF).
The sensors measure simultaneously in synchronization mode.
This operating mode prevents unwanted mutual interference since
measurements from dierent times are not incorrectly compared with one
another. The sensors can therefore be mounted without taking into account
mounting distances.
The acoustic pulses of a sensor deected by an object can still be analyzed
by neighboring sensors. This makes it possible to implement more reliable
and simultaneous monitoring of large areas with synchronization mode, but
without position detection of the recorded objects.
The detection zone is enlarged to a size which covers all synchronized
sensors. A maximum of 20 sensors of type UM18-2 Pro can be connected,
and they can also be combined with synchronizable SICK ultrasonic
sensors from other product families.
The response time of the overall system is determined by the sensor with
the highest response time.
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Synchronizationmodestructureand
t
operating principle
5.3.3 Multiplex mode
Mounting
PIN 5
Fig. 4: Synchronization mode
NOTE!!
The multipex mode is not available in IO-Link mode.
Description of multiplex mode To change to multiplex mode, sensors must be interconnected via
PIN 5 (MF) and dierent addresses must be assigned to them using the
Connect+ software.
In multiplex mode, all sensors measure in alternation in a dened
sequence. This operating mode prevents unwanted mutual interference
since measurements from dierent times cannot be incorrectly compared
with one another. The sensors can therefore be mounted without taking
into account mounting distances.
Thanks to alternating measurement, the monitoring of large areas is
possible with additional position detection of recorded objects.
The detection zone is enlarged to a size which covers all connected
sensors. A maximum of 20 sensors of type UM18-2 Pro can be connected,
and they can also be combined with synchronizable SICK ultrasonic
sensors from other product families.
Since measurement by the sensors is done in alternation, the response
time of the total system is increased in accordance with the “overall
response time” formula.
NOTE!
For multiplex mode, you must assign a unique address to
the sensors. The "Connect + Adapter" and the associated
software is required for this (order no. 6037782)
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