6
MB2000
Datum 09.11.2009
Art.Nr. 81962
Änd. Stand 326/09
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6: Definition of counting direction / mounting
Counting direction A before B
cable outlet
travel direction
active side
Gap sensor/magnetic strip 1-10mm
±3°
±3°
±3°
maximum alignment errors
Fig. 1: Mounting of the magnetic strip
Attention!
Do not expose the system to magne-
tic fields. Any direct contact of the magnetic strip
with magnetic fields (e.g. adhesive magnets or
other permanent magnets) is to be avoided. Sen-
sor movements during power loss are not captured
by the follower electronics.
Mounting examples
Mounting with chamfered ends (fig. 2) is not re-
commended unless the strip is installed in a safe
and protected place without environmental influ-
ences. In less protected mounting places the strip
may peel. There we recommend mounting accord.
to fig. 3 and 4.
Mounting in a groove (fig. 5) best protects the
magnetic strip. The groove should be deep enough
to totally embed the magnetic strip.
4. Electrical connection
Wiring must only be carried out with power off!
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 inter-
ferences can affect the sensor or the connec-
tion lines!
Interference can be caused by motors,
switch gear, cyclic controls and contactors. Sui-
table wiring layout and choice of cable can mini-
mise the effects of interference.
Necessary measures:
Only screened cable should be used. Wire cross sec-
tion is to be at least 0,14mm², max. 0,5mm².
Wiring to the screen and ground (0V) must
be secured to a good point. Ensure that the
connection of the screen and earth is made to
a large surface area with a sound connection to
minimise impedance.
The sensor should be positioned well away from
cables with interference; if necessary
a protective
screen or metal housing
must be provided. The
running of wiring parallel to the mains supply
should be avoided.
•
•
•
•
•
3.2. Mounting the sensor
Use the two M3 screws to fix the magnetic sensor
via the ø3,5mm through holes. We recommend to
use the enclosed fixing screws and washer springs
(fastening torque 0,25Nm).
Cable layout should avoid damages due to cable
strain or other machine parts. If necessary use
a drag chain or protective hose and provide for
strain relief.
Sensor must be aligned correctly with respect
to the counting direction (see fig. 6).
This can
be ignored if counting direction can be changed
via the follower electronics (e.g. by magnetic
display units from SIKO).
When mounting the magnetic sensor, ensure that
the gap between strip & sensor and the max.
•
•
•
admissable deviation are maintained over the
total measuring length (see fig. 6)!
Maximal travel speed <10m/s.
•