Function And Characteristics; Characteristics; Function; Available Stroke Lengths And Magnets - Balluff BTL5-P1-M Serie Manuel D'utilisation Et Description Technique

BTL5-P/I1-M_ _ _ _-H/W-S32/K_ _/KA_ _
Micropulse Linear Transducer - Rod Style
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Function and Characteristics

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
Wear- and maintenance-free
–
BTL to processor cable lengths
–
up to 500 m
– Pressure rated to 600 bar
– Enclosure rating per IEC 60529:
Connector version IP 67
Cable version IP68 (5 bar / 48 h)
2.2

Function

The transducer contains a
waveguide enclosed by an outer
stainless steel rod. A magnet at-
tached to the moving member of
the machine or to the cylinder pis-
ton is moved over the rod and its
position constantly updated.
The magnet defines the measured
position on the waveguide. An ex-
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Installation

3.1

Mounting

When possible, use non-magnetiz-
able material for attaching the trans-
ducer and magnet ring. ➥ ➥ ➥ ➥ ➥ Fig. 3-1.
When attaching the transducer to
magnetizable materials, appro-
priate measures must be taken to
protect against magnetic disturb-
ances ➥ ➥ ➥ ➥ ➥ Fig. 3-1. Note the
recommended distance of the
transducer and cylinder from
strong, external magnetic fields.
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 arriv-
ing at the beginning of the wave-
guide 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 re-
peatability within the measuring
range indicated as the nominal
stroke length.
At the rod end is a damping zone,
within which no reliable signal is
available, but which may be entered
by the magnet.
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.
➀ - ➂ for magnetizable materials
➃ for non-magnetizable materials
Fig. 3-1: Mounting
Dimensions for installing the
Micropulse transducer: ➥ ➥ ➥ ➥ ➥ Fig. 3-2
Dimensions for installing the mag-
net: ➥ ➥ ➥ ➥ ➥ Fig. 3-4
2.3 Available stroke lengths
and magnets
To ensure flexible application, nomi-
nal transducer stroke lengths of
from 50 to 4000 mm and various
types of magnets are available.
Magnets need to be ordered sepa-
rately.
non-magnetizable material
a = Spacer made of non-mag-
netizable materials
b = Magnet
english
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