Balluff BTL5-I, Руководство пользователя

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BTL5-P/I/K/L/M_-M_ _ _ _-P-S32/KA_ _
Micropulse Linear Transducer in Profile Housing
3
english
2.1 Characteristics
Micropulse transducers feature:
—
Very high resolution, repeatability
and linearity
— Bus-compatible interface
(BTL5-I...)
— Immunity to shock, vibration,
contamination and electrical noise
—
An absolute output signal
—
BTL to processor cable lengths
up to 500 m
—
IP 67 per IEC 60529
2.2 Function
The Micropulse transducer con-
tains a 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 ex-
ternally generated INIT pulse inter-
acts with the magnetic field of the
magnet to generate a magnetostric-
tive 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
arriving at the beginning of the
waveguide creates an electrical
signal in the coil surrounding the
waveguide. The propagation time
of the wave is used to determine
the position, which is presented
on the output in various digital
formats. This takes place with high
precision and repeatability within
the measuring range indicated 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 processor/con-
troller and the power supply is via a
cable, which depending on the ver-
sion 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.
2 Function and Characteristics
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
(between 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).
3 Installation
Notch on housing to mark the beginning of the stroke range
Current position of
magnet
Moving ma-
chine part
Micropulse Transducer
Machine
Nominal stroke =
Measuring range
Fig. 2-1: Basic arrangement
El.
connection
Damping zone
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:
!"#$%&'(&)*"+!
,--.
/)0#&-&)"!
,--.
' 12 333 4222 ' 12
'4222 333 5222 ' 422
'5222 333 6222 ' 512
Other stroke lengths on request.