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1
Safety information
1.1 General safety notes
Safety notes and complete information on the DAX linear encoder are available for
download in the Internet at www.sick.com/DAX®.
If the device is not functioning correctly, it must be taken out of operation and
secured against unauthorized operation.
To guarantee proper operation of the device, please observe the following:
•
Protect the device against mechanical stress during installation.
•
Do not open the device.
•
Connect the device with the correct polarity, supply voltage, and control
pulses.
•
Observe the permissible operating and ambient condition for the device.
•
Regularly check the device for correct operation and document the results.
1.2 Purpose of the device
The linear encoders in the DAX
®
product family are suitable for determining the
absolute position of piston rods in hydraulic cylinders and linear movements
in industrial plants. Thanks to magnetostrictive technology, the encoder is com‐
pletely wear- and maintenance-free. Individual configuration options ensure cus‐
tomized integration in nearly any application.
The device is a component and must be connected to a suitable electronic control
unit.
2
Product description
2.1 DAX® device variants
The device is currently available in 3 housing variants:
DAX® Threaded
DAX® Slider
Rod design with screw-in
The versatile profile variant
thread for use in industrial
with slide profile
hydraulic cylinders
Each housing variant is available with the following interfaces and connection
types:
Interfaces and connection types
Analog
1xM12 male connector, 5-pin
1xM12 male connector, 8-pin
Output signals
•
Analog (0 ... 10 V or 4 ... 20 mA)
•
CANopen®
NOTE
See DAX® product pages
www.sick.com/DAX®
3
Mounting
3.1 DAX® rod variants
3.1.1
Prepare for installation
3.1.1.1 General notes on installation preparation
Recommended materials:
We recommend using non-magnetizable materials for holding the DAX® and the
position magnet.
Horizontal mounting:
For horizontal mounting with a measuring range > 500 mm, the rod must be
supported.
Hydraulic cylinder:
When installing the device in a hydraulic cylinder, ensure the minimum value for
the bore diameter of the receiving piston.
Position magnets:
Different position magnets are available for the DAX®. See the product page of
the DAX®
www.sick.com/DAX®
3.1.1.2 Specific installation preparation
For information on installation preparations, see operating instructions 8028176
on
www.sick.com/DAX®
8028139/1LXF/2023/12/01/de, en
DAX® Low Profile
Profile variant especially suit‐
able for tight installation sit‐
uations
CANopen®
1xM12 male connector, 5-pin
3.1.2
Performing the installation
e n
3.1.2.1 Mounting in the cylinder base
CAUTION
Functional impairment
Improper assembly can impair the function of the DAX® and lead to
increased wear.
The contact surface of the DAX® must be in full contact with the mount‐
ing surface.
The bore must be perfectly sealed (O-ring).
Lubricate the O-ring and pressure pipe before installation.
To screw in the device, apply force to the hexagonal flange only. Do not
turn the triangular housing.
NOTE
When screwing on the sensor, observe the maximum tightening torque of
50 Nm. Grease the O-ring before screwing in the device.
Figure 1: Mounting in the cylinder base
3.1.2.2 Mounting the magnet in the piston
NOTICE
Make sure that the retaining ring and the corrugated spring washer are
made from non-magnetic material (e.g., non-ferritic steel).
Ensure that the position magnet and the non-magnetic spacer or retain‐
ing ring do not rub on the pressure pipe.
Example suitable retaining ring: BEF-MK-SR-xx does not contain
•
any internal edges or eyelets to the pressure pipe.
Observe the operating pressures.
Sequence of work steps:
Prepare the piston for installation of the magnet: see Operating Instructions
8028176
www.sick.com/DAX
If necessary, use a corrugated spring washer or a non-magnetic spacer.
Mount the position magnet.
Insert the retaining ring and fasten using M4 screws. Observe the maximum
permissible screwing torque of the respective position magnet when screw‐
ing it in.
WARNING
Improper mounting
Improper mounting can impair the function of the linear encoder and cause
damage.
Make sure that no strong electric or magnetic fields occur in the immedi‐
ate vicinity of the linear encoder.
When installing the device, the specified clearances must be observed.
The installation position is arbitrary. Use the supplied mounting brackets
to mount the linear encoder on a flat surface of the machine. A sufficient
number of mounting brackets have been supplied.
NOTE
To avoid the generation of resonance frequencies during vibration loads, we
recommend positioning the mounting brackets at irregular distances.
3.2.1
Mounting the DAX® profile variants
Installation procedure
1.
Prepare the substrate for installation of the linear encoder. For this purpose,
drill two holes 50 mm apart in the substrate per mounting bracket.
For the slider housing design, locate the first mounting bracket directly on
the sensor head and the last mounting bracket approx. 100 mm before the
end of the slider profile.
For more information, see the DAX® Slider dimensional drawing see
www.sick.com/DAX
2.
Guide the linear encoder into the mounting brackets.
3.
Secure the linear encoder to the substrate using suitable fixing screws (rec‐
ommendation: M5 x 20 according to DIN 6912) (tighten the screws in the
brackets to max. 5 Nm).
4.
Mount the position magnet (accessory). To do so, follow the instructions in
section
see Position magnets, page
max. 50 Nm
®
®
10.
DAX® | SICK
9
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