Balluff BTL6-V11V-M Series, Руководство пользователя, Страница: 6 / 18

6 english
0.5 Ø 25
71 12.8 25
60
Ø D1
G
45
46
Fig. 3-1: BTL6... transducer, construction and function
3.1 Construction
Electrical connection: The electrical connection is made
via a connector (see Type code breakdown on page 16).
BTL housing:
Aluminum housing containing the
processing electronics.
Mounting thread: We recommend assembling these
transducers on the fastening screw thread:
– BTL6-…-A/B: M18×1.5
– BTL6-…-Y/Z: 3/4"-16UNF
The transducer with Ø 10.2 mm has 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 14).
Nominal length: Defines the available measuring range.
Rods with various nominal lengths from 25 mm to
4012 mm are available depending on the version:
– Ø 10.2 mm: Nominal length from 25 mm to 4012 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.
3
Construction and function
1) Unusable area
2) Not included in scope of delivery
Version D1 G
...-A/B/Y/Z-... 10.2 mm Thread M4x4/6 deep
...-A8/B8/Y8/Z8-... 8 mm No thread
1)
3.2 Function
The BTL6 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.
This information is transferred via the VARAN interface.
VARAN is an industrial bus system based on the physical
layer of the Ethernet (see www.varan-bus.net).
BTL6...S115
Nominal length =
Measuring range
Mounting surface
B: 30-1 mm
Z: 2"-0.04"
Damping zone 1)
Magnet 2)
Thread size
B: M18x1.5
Z: 3/4"-16UNF
1)
Mounting surface
A: 30-1 mm
Y: 2"-0.04"
Thread size
A: M18x1.5
Y: 3/4"-16UNF
2)
BTL6-V11V-M _ _ _ _ -A/B/Y/Z(8)-S115
Micropulse Transducer - Rod Style