Page 383 - Sensors and Systems - North American Catalog
Basic HTML Version
Proximity Sensors
1
Proximity Sensors,
Capacitive Sensors
1
.2
Proximity Sensors,
Magnetic Field Sensors
1
.3
381
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Refer to General Notes Relating to Product Information
Pepperl+Fuchs Group
USA: +1 330 486 0001
Singapore: +65 6779 9091
Copyright Pepperl+Fuchs
Proximity Switches
Introduction to Magnetic Field Sensors
Magnetic "Penetrating Sensors" for
Hydraulic Cylinders
The MB-F32 magnetic field sensor has a unique special feature. The
sensor enables one of the pistons to be detected through the wall of a steel
hydraulic cylinder. Once the piston passes under the sensor, the sensor
generates a switching signal. This special function means that the sensor
can be used to determine the position of the piston and also to count the
piston strokes.
Functional description of magnetic penetrating sensors
The MB-F32 sensor reacts to low-level magnetic fields in the wall of the
cylindermagnetic fields. It requires a magnetic field change in order to
change its switching state. In the example below, the magnetic pole shoe
of the piston induces a partial magnetic field in the steel cylinder wall. The
sensor switches once the partial magnetic field passes under the sensor.
Cross section through a hydraulic cylinder with view of the cylinder and pole
shoe
Mounting magnetic penetrating sensors
The MB-F32 magnetic field sensor is positioned on the outer surface of the
steel cylinder wall and secured using a tightening strap.To create a functional
system, a special pole shoe must be mounted to the piston inside the
hydraulic cylinder.The shape and geometric dimensions of the pole shoe as
well as the size and number of magnets depends on the configuration of the
respective cylinder piston system. Consult the specialists at Pepperl+Fuchs
who can provide assistance with the requirements of the magnetic system
design.
Electrical Output
A2
4-wire, DC, PNP, antivalent
E2
3-wire, DC, PNP, NO
1N, N1
NAMUR, NO
Connection Elements
V1
M12 x 1 device connector for DC proximity switches
V3
M8 device connector for DC proximity switches
geeignet)
MB 60 - 12 G M 50 - E2 - V1
Cylindrical
usable
threaded length
(mm)
M
Magnetic
J
Initiator
B
Basis line
C
Comfort line
Operating range
35 mm or 60 mm
Diameter in mm
Rectangular type
F32, F12
M
Metal
G
Threading
Type code, magnetic field sensors
