8
MBA511
Datum 29.07.2015
Art. Nr. 81105
Änd. Stand 284/15
Fig. 2: Mounting the magnetic strip
Fig. 7: Mounting tolerances
0.
1 ... 2
<0.5°
<3°
<1°
±1.0
Fig. 3
Fig. 4
Fig. 5
Fig. 6
• Fix cover strip (both ends should slightly overlap).
• Also fix cover strip's ends to avoid unintentional
peeling.
magnetic strip (without cover strip) is 2 mm.
When using a cover strip, the gap is reduced by
the thickness of the cover strip including its ad-
hesive tape. The Sensor must not touch the mag-
netic strip.
An accumulation of the different possible mounting
tolerances should be avoided.
Attention!
Do not expose the magnetic strip to
magnetic fields. Any direct contact of the magnetic
strip with magnetic fields (e.g. adhesive magnets
or other permanent magnets) is to be avoided. The
same applies to the sensor during operation.
Mounting examples
Mounting with chamfered ends (fig. 3) is not rec-
ommended unless the strip is installed in a safe and
protected place without environmental influences.
In less protected mounting locations the strip may
peel. There we recommend mounting accord. to fig.
4 and fig. 5.
Mounting in a groove (fig. 6) best protects the mag-
netic strip. The groove should be deep enough to
totally embed the magnetic strip (e.g. SIKO-PSA-
rail).
3.2 Sensor mounting
When mounting the magnetic sensor, ensure that
the arrow on the sensor heads in the same direction
as the arrows on the magnetic strip (fig. 1).
The sensor's position relative to the magnetic strip
is exactly defined. The correct gap between sensor
and magnetic strip must be maintained over the to-
tal travel distance, irrespective whether the strip or
sensor moves (fig. 7).
Within the defined limits (fig. 7), errors due to devi-
ation are less important than errors resulting from
strip and sensor tolerances.
The max. allowable distance between sensor and
4. Electrical connection
•
Switch power off before any plug is inserted or
removed!!
• Wiring must only be carried out with power off.
• Provide standed wires with ferrules.
• Check all lines and connections before switching
on the equipment.
Interference and distortion
All connections are protected against the effects of
interference.
The location should be selected to
ensure that no capacitive or inductive interfer-
ences can affect the encoder or the connection
lines!
Suitable wiring layout and choice of cable
can minimise the effects of interference (e.g. inter-
ference caused by SMPS, motors, cyclic controls and
contactors).
Necessary measures:
• Only screened cable should be used. Screen should
be connected to earth at both ends. Cross section
of the lines = 0,25 mm
2
.
• Wiring to screen and to ground (0 V) must be via
a good earth point having a large surface area for
minimum impedance.
• The unit should be positioned well away from
cables with interference; if necessary
a protective