Page 810 - Sensors and Systems - North American Catalog
Basic HTML Version
Positioning Systems
5
Positioning Systems,
Inductive Positioning Systems
5
.1
Positioning Systems,
Distance Measurement Devices
5
.2
Positioning Systems,
PosiTrack
WCS
5
.3
Positioning Systems,
PosiTrack
PCV
5
.4
Positioning Systems,
Electronic CAM-Switch Controller
PAX
5
.X
Positioning Systems,
Accessories
5
.5
808
Germany: +49 621 776-4411
Refer to General Notes Relating to Product Information
Pepperl+Fuchs Group
USA: +1 330 486 0001
Singapore: +65 6779 9091
Copyright Pepperl+Fuchs
Positioning Systems
Introduction
the actuator must not leave the detection range [a] of the sensor, nor exceed
the specific distance [b]. The specific mounting conditions are included in
the data sheets.
Inductive positioning systems can be built into, or flush-mounted on a
machine element. They can be mounted side-by-side or end to end. To
avoid cross-talk between the sensors, either two different actuators or one
actuator with an insulation layer [B] are to be used between the sensors. See
data sheet for details.
Inductive positioning systems
PMI-F90
The PMI-F90 inductive positioning system is available in three different
lengths: 80 mm, 104 mm, and 120 mm. In addition to versions with analog
signal output designed solely for positioning, versions are also available
with combined analog and binary functions.
PMI-F110
For longer measuring ranges, the PMI-F110 series is available in five
different lengths from 210 mm to 960 mm. The F110 series provides an
analog output signal that is either 0 V to 10 V or 4 mA to 20 mA.They can be
mounted in the machine bed using adjustable t-slides.
PMI-F112
The PMI-F112 series offers a measuring length up to 14 mm and has a
compact housing. The analog voltage signal (0 V to 10 V) is adjustable
between 7 mm and 14 mm on the measuring range. In addition to the
standard version with analog interface, a configurable version is available
with an IO-Link interface.
Inductive angular position feedback system
PMI-F130
The angle-measuring PMI-F130 sensors are similar to the linear positioning
sensors. The metallic actuator is integrated into a round puck that can be
mounted onto a rotating drive shaft.The air gap between the sensor and the
puck enables wear-free evaluation of the rotation angle.
The PMI-F130 series includes three different function types. In its basic
function, the sensor feeds back the measured rotation angle as an analog
current signal (4 mA to 20 mA) or a voltage signal (0 V to 10 V). The
desired rotation angle range can be scaled for the output range. Similar to
the PMI-F90 positioning sensor, the F130 is also available as an angular
sensor with two configurable switching window functions. An additional
model is also available with three separately configurable switching window
functions.This version can be used as a noncontact electronic cam position
switch.
PMI Inductive Analog Measuring Systems
From switch to positioning measuring technology
The PMI series of position measurement sensors are inductive based
measurement devices that can be used to detect the position of a metal
target relative to the device sensing surface. Combining inductive sensing
techniques with microcontroller technology, these sensors can be used
to provide analog feedback or switching point information to automation
control or error proofing systems. In addition to the analog current signal
(4 mA to 20 mA) or voltage signal (0 V to 10 V), PMI sensors also offer
binary switching element functions.This enables limit switch positions to be
implemented in addition to the measured path information.
The PMI series of sensing products comes in two configurations, one for
linear measurement and one for 360 degree angular measurement.
Special technical features:
Noncontact path and angle positioning
The inductive functional principle of these sensors enables contact-free
position measurement. This measuring technique operates entirely without
wear and provides reliable position and switching signals even in the most
extreme ambient conditions.
Simple steel actuator
PMI sensors react to a simple steel actuator. The actuating element can be
designed as a part of the machine module.
Three-in-one – combined measuring and switching element
functions
The combination of analog output and switching element functions can
replace up to three standard sensors. For complete valve control, the actual
position, both end stop positions, and valve OPEN and valve CLOSED can
be fed back to the control system.
Functional description of inductive positioning sensors
PMI position measurement
sensors have multiple coils
positioned in two rows on a coil
carrier.Whenanactuator passes
over the coil arrangement, it
creates a path-dependent
attenuation pattern over the
coils. The attenuation level for
adjacent coils is compared in
order to determine the exact
position of the actuator.
Actuators are offered as
accessories, but they can be produced as part of a machine module. In
order to meet the specified performance,certain mechanical dimensions
and mounting conditions must be adhered to when reproducing the
actuator.
Material and dimensions of the actuator
Actuators for PMI sensors
are made out of mild steel.
Construction
steel
1.0037
(formerly ST37) is used as the
reference material. When using
other materials, you must take
into account that the sensor will
not provide the specified measurement accuracy. To provide protection
against corrosion, the actuator’s surface can be burnished, varnished, or
galvanized.
The actuator must present a coplanar surface with two non-rounded edges
to the measuring surface of the sensor. The required width of the actuator
is 8 mm or 13 mm depending on the sensor type. The actuator must be
long enough to completely overlap the active sensor area. The detailed
dimensions are included in the specific sensor data sheet.
Mounting
The sensor and actuator together make up the positioning system. To
ensure proper performance with the correspondingmeasurement accuracy,
Mounting conditions for actuators
on positioning sensors
Side-by-side arrangement, cascading of
positioning sensors
Outline of angular positioning system with
central opening for the actuator
Dimensions and mounting conditions for
reproducing the actuator
