Function And Characteristics; Characteristics; Function; Available Stroke Lengths And Magnets - Balluff BTL5-H1 -M -P-S 92/KA Series User Manual

BTL5-H1_ _-M_ _ _ _-P-S92/KA_ _
Micropulse Linear Transducer in Profile Housing
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Function and Characteristics

2.1

Characteristics

– High data security: Output data
are checked for validity and plau-
sibility in the µC
– Notification with highest priority
on reaching the switching points
– Up to 4 positions can be evalu-
ated (DS 406)
– Definable measurement range
(cams) with high data rate
– Absolute measurement system
– Very high resolution, repeatability
and linearity
– Insensitive to vibration, shock
and contamination
– Up to 2500 m cable permitted
– Object directory per Draft Stand-
ard 406 (Encoder Profile)
– Protected IP 67 per IEC 60529
2.2

Function

The Micropulse transducer contains
a tubular waveguide enclosed by an
extruded aluminum housing. A
magnet attached to the moving
member of the machine is moved
across the top of the housing and
its position constantly updated.
The magnet defines the measured
position on the waveguide. An inter-
Notch on housing to mark the beginning of the stroke range
Current position of
magnet
Micropulse Transducer
Fig. 2-1: Basic arrangement
nally generated INIT pulse inter-
acts with the magnetic field of the
magnet to generate a magneto-
strictive torsional wave in the
waveguide which propagates at
ultrasonic speed.
The torsional wave arriving at the
end of the waveguide is absorbed in
the damping zone. The wave arriv-
ing at the beginning of the wave-
guide creates an electrical signal in
the coil surrounding the waveguide.
The wave propagation time is used
to define the position with a resolu-
tion of 5 µm. This takes place with
high precision and repeatability
within the measuring range indi-
cated as the nominal stroke length.
On both ends of the nominal stroke
length is an area which provides an
unreliable signal, but which may be
entered.
The electrical connection between
the transducer, the controller/master
and the power supply is via a cable,
which depending on the version is
either fixed or connected using a
female connector.
Dimensions for installing the
Micropulse transducer and for the
magnets and control arm are found
on ➥ ➥ ➥ ➥ ➥ pages 4 and 5.
Nominal stroke =
Measuring range
Moving ma-
chine part
Machine
2.3 Available stroke lengths
and magnets
To provide for optimum fit in any
application, a wide range of stan-
dard stroke lengths and magnets in
various form factors are available.
Magnets and control arms must
therefore be ordered separately.
The following nominal stroke
lengths are available:
stroke lengths increments
[mm] [mm]
50 ... 1000 50
1000 ... 2000 100
2000 ... 4000 250
Other stroke lengths on request.
3

Installation

3.1

Transducer installation

Ensure that no strong electrical or
magnetic fields are present in the
immediate vicinity of the trans-
ducer.
Any orientation is permitted. The
supplied mounting brackets and
cylinder head screws allow the
transducer to be mounted on a flat
machine surface.
A sufficient quantity of mounting
brackets is supplied.
Recommended installation:
Distance A = approx. 80 mm
Distance B = approx. 250 mm (be-
tween the individual clamps)
To prevent resonant frequencies
under vibration loads of >50 g, we
recommend placing the mounting
clamps at irregular intervals.
The supplied isolation bushings are
used to electrically insulate the
transducer from the machine.
➥ ➥ ➥ ➥ ➥ Fig. 3-1and 3-5 and chapter 5.6
Noise elimination
The Micropulse transducer in profile
housing is suitable both for floating,
i.e. non-contacting magnets
(➥ ➥ ➥ ➥ ➥ Page 4) and for captive magnets
(➥ ➥ ➥ ➥ ➥ Page 5).
english
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