Datasheet

SONARANGE UPX 05.14 e
This Information corresponds to the current state of knowledge. SNT reserves the right to make technical changes. Do not use these products in any application
where failure of the product could result in personal injury. Liability for consequential damage resulting from the use of SNT products is excluded.
SNT Sensortechnik AG, Hammerstrasse 6, CH-8180 Bülach, Switzerland, Phone [phone], Fax [phone], [e-mail] 2/4
www.sntag.ch
Model selection
Thanks to a new transducer sealing the UPX sensors are
very robust against many environmental influences. In
particular, they are oil resistant, unlike many other ultrasonic
sensors.
The main difference between the two UPX models is their
different detection range (reach and shape). Also switching
speed is different.
UPX 150 ...
Very narrow detection zone. Useful for looking into small
orifices. Fast reaction time t
on
. For fast counting/detecting up
to 150mm distance and for level control as well. Binary
output only. Axial hysteresis can be adjusted with
potentiometer from approx. 5…50mm, depending on
switching distance. This enables e.g. also a min./max. level
control.
UPX 500 ...
General purpose proximity switch with fast reaction time t
on
and slower t
off
delay. The delay can be adjusted with
potentiometer between 0.4...8s. Detection zone with Ø
~90mm. Binary output only.
Blind range
The lower detection range is called blind range. It is typical
for ultrasonic sensors. In the blind range no distance
measurement is possible. However the pure function as
proximity switch (binary output), as used on the UPX series,
is possible in the blind range with certain restrictions (only
bigger objects).
Binary output
The binary output becomes active, i.e. it switches on or off,
when a scanned object falls below the set distance or if it
exceeds it. Each switch point has a hysteresis (see technical
specifications). This is the difference between switch on and
switch off point during approach or departure. Hysteresis is
necessary for an appropriate switching behavior.
The switching distance is set with the potentiometer. An
object with reasonable size and perpendicularly to the sensor
axis is placed at the desired distance from the sensor. The
potentiometer is now turned from left slowly clockwise until
the LED illuminates (NO) or expires (NC). Thus the switching
distance for the binary output is set.
Synchronisation input (Y versions)
The ultrasonic signals can disturb each other when several
sensors are focused on he same target or when sensors are
mounted close together. This can be avoided by
synchronizing the sending pulses. The synchronisation leads
of all sensors are connected to each other by shielded cables
as short as possible. Since all sensors send then
simultaneously, the current consumption increases heavily.
Not used synchronisation leads shall be isolated.
Inclination angle of object
Smooth surfaces can be detected up to an inclination angle
of 7° (UPX 150) and 10° (UPX 500). However rough and
structured (granular) surfaces can be detected up to much
higher angles.
Mounting
Ultrasonic sensors should be mounted softly in order to keep
external acoustic noise away from the sensor. The UPX
sensors can be mounted in two ways, with two M4 screws
through the two holes in the housing or on the M18 thread of
the transducer as well. A rubber gasket should be used
between the sensor and the mounting spot. Included with the
sensor are an M18 nut, a washer and a rubber sleeve for
mounting on the M18 transducer. The rubber sleeve is sized
for a mounting hole of Ø21mm.
Cable
The sensors have a 3- or 4-pin M8 connector for screw or
snap-on connection or an integrated cable. The cable should
be kept as short as possible. Maximum cable length is
approx. 100m, if cross section area is appropriate (peak
current of 100 or 250mA, use 470µF/35V backup capacitor
close to sensor). The cable should not be mounted parallel or
close to high current cables.
Cables for connection to the M8 connector have to be
ordered separately.
Power supply
Ideally a power supply is used exclusively for the sensor. The
power supply must be able supply the short peak current of
approx. 100mA (UPX 150) or 250mA (UPX 500). In order to
avoid disturbances the part where the sensor is mounted
must be correctly earthed.
rubber sleeve
max. 2.5mm
Washer
Ø21mm