Construction And Function; Construction; Function - Balluff BTL7-S5xx-Mxxxx-A/B-SA211-S32/S147/KAxx/FA serie Betriebsanleitung

BTL7-S5 _ _ (B)-M _ _ _ _ -A/B(8)-SA211/SA311-S32/S147/KA _ _ /FA _ _
Micropulse Transducer - Rod Style
3

Construction and function

BTL7...cable
Ø 6.7
BTL7...S32/S147
13.5
11
Version D1
...-A/B-... 10.2 mm
...-A8/B8-... 8 mm
Fig. 3-1: BTL7...A/B(8)... transducer, 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 24 or page 25).
Housing: Aluminum housing containing the processing
electronics.
Mounting thread: We recommend assembling the
transducer on the fastening screw thread:
– BTL7-...-A/B: M18×1.5
The transducers 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 21).
Nominal length: Defines the available measuring range.
Rods with various nominal lengths from 25 mm to
7620 mm are available depending on the version:
– Ø 10.2 mm: Nominal length from 25 mm to 7620 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
Mounting surface
50.8-1 mm
(2"-0.04")
1)
Magnet 2)
BTL7...B...
0.5 Ø 25
Thread size:
M18x1.5
71 25
1) Unusable area
G
Thread 2) Not included in scope
M4x4/6 deep of delivery
No thread
Damping zone 1)
60
Nominal length =
Measuring range
Mounting surface
3.2

Function

The Micropulse Transducer 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 that is output
in antivalent form as 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.
In addition to the position output value, the following
functions can be selected (only BTL7-S510(B)-...):
– Differential position
– Speed (with or without leading sign)
– Speed difference
View of
BTL7...S32
45
46
50.8-1 mm
(2"-0.04")
2)
1)
BTL7...A...
25
Thread size:
M18x1.5
english 7