Balluff BTL6-Ax1 Series, User Manual

Page: 22 / 74

6 english
Fig. 3-1:
~60 ~60
60
50
Ø 5.5
Ø 30
18
37
55-4
M12x1
73 2)
21
73 2)
~250 ~250
Slot
1)
not included in scope of delivery
2)
unusable area
Mounting cuff
1)
BTL6-A-MF03-K-50
Magnet
BTL6-A-3801-2
1)
Nominal length
= Measuring range
BTL6…, construction
3.1 Construction
Electrical Connection: The electrical connection is made
using a connector.
Housing: Aluminum, contains the processing electronics.
Magnet: Defines the position to be measured on the
waveguide. Magnets are available in various models and
must be ordered separately (see Accessories on
page 11).
Nominal length: The following standard nominal lengths
are available for compatibility with any application:
Nominal length
BTL6-A/G… 50…1500
3.2 Function
The BTL contains the waveguide which is protected by an
aluminum housing. A magnet is moved along the
waveguide. This magnet is connected to the system part
whose position is to be determined. The magnet defines
the position to be measured on the waveguide.
An internally generated INIT pulse interacts with the
magnetic field of the magnet to generate a torsional wave
in the waveguide which propagates at ultrasonic speed.
The component of the torsional wave which arrives at the
end of the waveguide is absorbed in a damping zone to
prevent reflection. The component of the torsional wave
which arrives at the beginning of the waveguide is
converted by a coil into an electrical signal. The position is
determined from the propagation time of the wave. This is
output as a voltage which is either rising or falling.
When there is no magnet within the measuring area, a
voltage of approx. 10.5 V is output as an error signal.
3
Construction and function
BTL6-A/G_1_-M_ _ _ _-A1-S115
Magnetostrictive Linear Position Sensor – Profile Style