Construction And Function; Construction; Function - Balluff BTL5-S1 Serie Manual De Instrucciones

BTL5-S1 _ _ (B)-M _ _ _ _ -K(8)-SR32/SR115/K_ _/F_ _
Magnetostrictive Linear Position Sensor – Rod Style
3

Construction and function

BTL5...-SR32
34 40-1
6
1)
Magnet
Mounting
25
surface
20
BTL5...-SR115
20
Fig. 3-1: BTL5-...K(8)-..., construction and function
3.1

Construction

Electrical connection: The electrical connection is made
via a cable or a connector ( see Type code breakdown on
page 21).
Housing: Housing containing the processing electronics.
Fastening: For secure fastening, tighten the BTL with
cylinder screws (ISO 4762, M6 × 16 - A2-70) at all 6
mounting holes (see Fig. 3-1). All screws must be
tightened to 3.5 Nm.
The BTLs with Ø 10.2 mm have an additional thread at the
end of the rod to support larger nominal lengths.
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 18).
Nominal length: Defines the travel/length range available.
Rods with various nominal stroke lengths from 25 mm to
4000 mm are available depending on the version of the
BTL:
– Ø 10.2 mm: Nominal length from 25 mm to 4000 mm
– Ø 8 mm: Nominal length from 25 mm to 1016 mm
Damping zone: Area at the end of the rod that cannot be
used for measurements, but which may be passed over.
www.balluff.com
Damping zone
Nominal length =
Measuring range
2)
Version D1
...-K-... 10.2 mm
...-K8-... 8 mm
BTL5-...-cable
20
1)
60
G
G
Thread
M4x4/6 deep
No thread
1)
2)
3.2

Function

The BTL contains the waveguide which is protected by an
outer stainless steel tube (rod). 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 the 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 travel time
of the wave is used to calculate the position, which is
output in the form of
synchronous-serial data (SSI) on the RS-422 interface.
This is done with a high level of precision and
reproducibility within the measuring range indicated as the
nominal length.
Ø 79
Ø 64
6 holes to fasten
the BTL
Unusable area
Not included in scope of delivery
english 7