Balluff BTL7-P511-M S115 Serie Manual De Instrucciones página 31

BTL7-P511-M _ _ _ _ -BE/BF/CE/ZE/ZF-S32/S115/KA _ _ /FA _ _
Magnetostrictive Linear Position Sensor — Rod Style
3
Construction and function
BTL7...BE/CE/ZE-cable
BTL7...BE/CE/ZE-S115
~23
Ø 6.7 12.3
BTL7...BF/ZF-cable
Cable protection
36.7
connection
3)
Internal thread:
1/2 NPT, 13 mm long
Fig. 3-1: BTL7...BE/BF/CE/ZE/ZF..., construction and function
3.1 Construction
Electrical connection: The electrical connection is made
via a cable or a connector (see Type code on page 21).
Housing: Housing containing the processing electronics.
Mounting thread: We recommend assembling the
following BTLs on the mounting thread:
– BTL7-...-BE-...: M18×1.5
– BTL7-...-BF-...: M18×1.5
– BTL7-...-CE-...: M22×1.5
– BTL7-...-ZE-...: 3/4"-16UNF
– BTL7-...-ZF-...: 3/4"-16UNF
The BTL 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 18).
Nominal length: Defines the available measuring range.
Rods with various nominal stroke lengths from 25 mm to
7620 mm are available depending on the version of the
BTL:
– Ø 10.2 mm: Nominal length from 25 mm to 7620 mm
– Ø 12.7 mm: Nominal length from 25 mm to 2000 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
BE/BF/CE: 30-1 mm
Mounting surface
ZE/ZF: 2"-0.04"
1)
BTL7...BE/CE/ZE-S32
10.5 A
71.5
Damping zone
Nominal length =
Measuring range
Magnet 2)
Thread size:
BE/BF: M18×1.5
CE: M22×1.5
ZE/ZF: 3/4"-16UNF
Version
...-BE/BF/ZE/ZF-...
...-CE-...
Unusable area
1)
Not included in scope of delivery
2)
for commercially available protection systems with
3)
corresponding thread
3.2 Function
The BTL 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 velocity.
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. The position
value corresponds to the travel time of the torsional wave
and is output as digital time information between the start
and stop pulses.
The evaluation may relate to the rising or falling edge. This is
done with a high level of precision and reproducibility within
the measuring range indicated as the nominal length.
Init
Start
Stop
T
T
Fig. 3-2: Time/distance measuring principle
1) 1)
60
View of
BTL7-...-S32
45.2
46
D1 A
10.2 mm 0.5 mm Ø 25 mm
12.7 mm 0.5 mm Ø 31 mm
english 7