Balluff BTL7-S5 M J-DEXC-TA12 Serie Manual De Instrucciones página 50

BTL7-S5_ _ (_)-M_ _ _ _-J-DEXC-TA12
Magnetostrictive Linear Position Sensor – Rod Style
3
Construction and function (continued)
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 speed.
The component of the torsional wave which arrives at the
end of the waveguide is absorbed in a 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 that is output
in antivalent form as synchronous serial data (SSI) on the
RS-422 interface. This is done with a high level of precision
and reproducibility within the measuring range indicated as
the nominal length.
Component overview
1)
Float
Pressure housing
2)
Magnet
O-ring flange (not
visible)
3)
Adapter
Location of ordering code for replacement
1) For use in liquid-level applications,
not included in scope of delivery (see section 9.1 Floats)
2) Not included in scope of delivery (see section 9.2 Magnets)
3) 1/2"-14 NPT to M20, optional (see
4) Modified 1/2"-14 NPT according to FM 3615, 3.3.3, D, 1
5) M6x45 A2 hexagon socket screws (6x, included)
(replacement screw kit: BTL7-A-FK01-E-J-DEX).
6) Wiring information (see section 4.5 Electrical connection)
10 english
External housing GND
Housing cover
O-ring
4)
Conduit entry
Internal housing GND
electronics module
section 9.4 Conduit adapter)
In addition to the position output value, the following
functions can be selected (only BTL7-S510-...):
– Differential position
– Velocity (with or without leading sign)
– Speed difference
Note on configuration
(only BTL7-S510-...)
The entire function scope can only be
configured with the PC software "Micropulse
Configuration Tool". To do this, the USB
communication box must be connected (see
Accessories on page 25).
Cover secondary retaining
screw
5)
Housing screws
Electronics module (including measuring range)
6)
Connection terminal
Ignition protection "d"
Flameproof enclosure
Retaining screws
Housing cover