autosen AI006 Manual de usuario
Operating principle of an inductive
proximity sensor
autosen AI001- AI065
autosen AI401- AI408
autosen AI801- AI816
autosen AI901- AI908
2502588 / 00 02 / 2019
Made in EU
UK
2
1. Operating principle of an inductive proximity sensor
The coil and capacitor form an LC circuit, also known as a basic sensor. Eddy current
losses in electrically conductive materials are used for a switching signal.
2. Terms:
Active zone / active
face
Space (room) above the sensing face in which the sensor reacts to the
approach of the damping material.
Output function Normally open: Object within the active zone
> Output switched.
Normally closed: Object within the active zone
> Output blocked.
Programmable: Normally closed or normally open can be freely selected.
Positive switching: Positive output signal (to L–).
Negative switching: Negative output signal (to L+).
Rated insulation
voltage
DC units with protection class II: 250 V AC
DC units with protection class III: 60 V DC
Rated short-circuit
current
For short-circuit-proof units: 100 A
Rated impulse with-
stand voltage
DC units with protection class II: 4 kV (≙overvoltage category III)
DC units with protection class III: 60 V DC: 0.8 kV (≙overvoltage
category II)
Power-on delay time The time the sensor needs to be ready for operation after application of
the operating voltage (in the millisecond range).
Operating voltage The voltage range in which the sensor functions safely. A stabilised and
smoothed direct voltage should be used!
Take into account residual ripple!
1: Connection
2: Housing
3: Downstream electronics
4: Capacitor
5: Pot core
6: Coil
7: Alternating electromagnetic eld = active face
8: Target = electrically conductive material
Current consumption Current for the internal supply of 3-wire DC units.
Degree of soiling Inductive proximity sensors are designed for degree of soiling 3.
Hysteresis Difference between the switch-on and the switch-off point.
Short-circuit pro-
tection
If autosen sensors are protected against excessive current by means of
a pulsed short-circuit protection, the short-circuit protection may cut in
with incandescent lamps, electronic relays and low resistance loads.
Standard target Square steel plate with a thickness of 1 mm and a side length identical
to the diameter of the sensing face or 3 x Sn, depending on which value
is greater.
Product standard IEC 60947-5-2
Repeatability = Repeat precision
Difference between any two Sr measurements. Max. 10% of Sr.
Switch point drift Shift in the switch point owing to changes in the ambient temperature.
Switching frequency Damping with standard target at half Sn. The ratio damped to undamped
(mark to space) = 1 : 2.
4
3. Sensing range (referred to the standard target)
Nominal sensing range Sn= characteristic value of the unit
Real sensing range Sr= individual deviation at room temperature between 90% and 110%
of Sn
Useful sensing range Su= switch point drift between 90% (Sumin = Sa) and 110% (Sumax)
of Sr
Safe sensing range =
operating distance Sa
= reliably switched between 0% and 81% of Sn
Safe switch-off distance = Sumax + max. hysteresis = 143% of Sn
4. Correction factors 5. Inuence of the standard target size
The sensor-specic values can be
found in the data sheet (exception
K1 units:
Same sensing range for all
X axis: Ratio between actual
target and the standard
target
6. Lateral approach and distances
7. Tips on ush and non-ush mounting in metal
Installation instructions for cylindrical designs
The principle of inductive sensor technology is based on an electromagnetic alternating eld created
via a copper coil embedded in an open pot core made of ferrite. An resonant circuit is created using
the capacitor. Thanks to an electrically conductive metal, located within a certain range in front of the
sensor, the eddy currents of the magnetic eld are strongly attenuated. These changes in the oscilla-
tion amplitude are detected by the sensor and the sensor is switched.
1. Typical switch-on curve (for slow approach)
2. Typical switch-off curve (for slow approach)
3. Poor repeatability
4. Good repeatability
The following applies for good repeatability of the
switch point: The closer the damping element is to
the sensor face the better. General recommendation:
a = 10% of the nominal sensing range.
1. Distance to the background
2. Recommended target distance
3. Recommended degree of coverage of
the sensing face
4. Recommended target size
The special feature of sensors which can be installed ush is the additional outer metal ring which
surrounds the coil. This shields the alternating eld and bundles it at the front.
non-ush mountable
sensor
Shielded coil with a ush
mountable sensor
6
Free zones
Free zones refer to areas around the sensor which must be kept free of metallic materials in order not
to compromise with the operating principle of the device.
With inductive sensors, a distance of at least three times the nominal sensing range must be main-
tained between a metallic material and the sensing face. The correct installation of non-ush mounta-
ble sensors also requires that there is no interference material within a distance less than the diameter
of the detection face. The sensing face projects out of the metallic environment by twice the length of
the nominal sensing range of the sensor.
d d≥ d d d≥ 2 x d
d = diameter of the
sensing face
(details in data sheet)
Sn = Nominal sensing range
(details in data sheet)
≥ d
≥3 x Sn
≥2 x Sn
≥3 x Sn
non-flush
mountable sensor
flush
mountable sensor
Flush and non-ush mountable
In principle, “ush” and “non-ush” mounting are only of relevance in metal environments. All non-met-
als such as plastics, wood and glass have no inuence on the mounting.
With ush mountable sensors, the sensing face of the sensor may be aligned level with the metal
installation environment. Needless to say, these sensors can also be mounted in a non-ush manner.
Sensors which are non-ush mountable, on the other hand, must not be installed level with the sur-
rounding metal surface. The metallic installation environment would cancel out the sensor’s alternating
eld and cause the sensor to switch continuously.
d = diameter of the
sensing face
(details in data sheet)
Mutual inuence
In applications in which two inductive sensors must be installed opposite each other, they should be
spaced out at a distance of at least eight times that of the nominal sensing ranges. With series connec-
tion, the spacing between the units must be observed.
≥8 x Sn
8. Installation instructions for rectangular designs AI006-AI009, AI407, AI408
ush: AI006, AI008, AI407
h=any
non-ush: AI007, AI009, AI408
8
Align the sensing face
flush
non-flush
Sn = Nominal sensing range
Art. no. Mounting Sensing range /
frequency
Switching
output
Structural
shape
Connectors
AI006 Flush 20 mm / 100 Hz Normally open Cubic M12
AI007 Non-flush 35 mm / 80 Hz Normally open Cubic M12
AI008 Flush 20 mm / 100 Hz Antivalent Cubic M12
AI009 Non-flush 40 mm / 60 Hz Antivalent Cubic M12
AI050 Flush 2 mm / 5000 Hz Normally open M8 thread M8
AI051 Non-flush 4 mm / 5000 Hz Normally open M8 thread M8
AI052 Flush 2 mm / 5000 Hz Normally closed M8 thread M8
AI053 Non-flush 4 mm / 5000 Hz Normally closed M8 thread M8
AI054 Flush 4 mm / 2000 Hz Normally open M12 thread M12
AI055 Non-flush 8 mm / 2000 Hz Normally open M12 thread M12
AI056 Flush 4 mm / 2000 Hz Normally closed M12 thread M12
AI057 Non-flush 8 mm / 2000 Hz Normally closed M12 thread M12
AI058 Flush 8 mm / 2500 Hz Normally open M18 thread M12
AI059 Non-flush 12 mm / 2000 Hz Normally open M18 thread M12
AI060 Flush 8 mm / 2500 Hz Normally closed M18 thread M12
AI061 Non-flush 12 mm / 2000 Hz Normally closed M18 thread M12
AI062 Flush 15 mm / 200 Hz Normally open M30 thread M12
AI063 Non-flush 20 mm / 200 Hz Normally open M30 thread M12
AI064 Flush 15 mm / 200 Hz Normally closed M30 thread M12
AI065 Non-flush 20 mm / 200 Hz Normally closed M30 thread M12
9. Classication of inductive sensors
autosen inductive sensors - standard class
for standard applications & factory automation in the standard designs M8, M12, M18, M30 & cubic
Find a wealth of technical information, incl. engineering data and suitable genuine accessories, at:
autosen.com/standard-class
10
autosen inductive sensors - high resistance class
Can be used in machine tool manufacture, resistant to oils & coolants.
Find a wealth of technical information, incl. engineering data and suitable genuine accessories, at:
autosen.com/high-resistance
Art. no. Mounting Sensing range /
frequency
Switching
output Structural shape Connectors
AI001 Flush 2 mm / 800 Hz Normally open M8 thread M8
AI002 Flush 2 mm / 800 Hz Normally open M8 thread M12
AI003 Flush 4 mm / 700 Hz Normally open M12 thread M12
AI004 Flush 8 mm / 400 Hz Normally open M18 thread M12
AI005 Flush 15 mm / 100 Hz Normally open M30 thread M12
AI024 Flush 2 mm / 1300 Hz Normally closed M8 thread M8
AI025 Flush 4 mm / 700 Hz Normally closed M12 thread M12
AI026 Flush 8 mm / 400 Hz Normally closed M18 thread M12
AI027 Flush 15 mm / 100 Hz Normally closed M30 thread M12
AI034 Flush 2 mm / 800 Hz Normally open Ø 6.5mm, smooth M8
AI035 Non-flush 4 mm / 700 Hz Normally open Ø 6.5mm, smooth M8
AI038 Flush 4 mm / 700 Hz Normally open M12 thread M12
Art. no. Mounting Sensing range /
frequency
Switching
output
Structural shape Cable
AI901 Flush 2 mm / 5 kHz Normally open M8 thread 5 m cable
AI902 Non-flush 4 mm / 5 kHz Normally open M8 thread 5 m cable
AI903 Flush 2 mm / 5 kHz Normally closed M8 thread 5 m cable
AI904 Non-flush 4 mm / 5 kHz Normally closed M8 thread 5 m cable
AI905 Flush 4 mm / 5 kHz Normally open M12 thread 5 m cable
AI906 Non-flush 8 mm / 5 kHz Normally open M12 thread 5 m cable
AI907 Flush 4 mm / 5 kHz Normally closed M12 thread 5 m cable
AI908 Non-flush 8 mm / 5 kHz Normally closed M12 thread 5 m cable
Este manual sirve para los siguientes modelos
71
Otros manuales de Accesorios de autosen
autosen
autosen AL005 Manual de usuario
autosen
autosen AL006 Manual de usuario
autosen
autosen AL007 Manual de usuario
autosen
autosen AP Series Manual de usuario
autosen
autosen AC005 Manual de usuario
autosen
autosen AF004 Manual de usuario
autosen
autosen AC004 Manual
autosen
autosen AP008 Manual de usuario
autosen
autosen AU011 Manual de usuario
autosen
autosen AL002 Manual de usuario
