Table of Contents
Introduction and Technical Information ................................................................................................3-7
DC-3 Wire-Standard...........................................................................................................................8-11
DC-3 Wire-Extended Sensing Distance ..........................................................................................12-13
DC-3 Wire-Short Body .....................................................................................................................14-17
DC-2 Wire-Standard ........................................................................................................................18-21
AC-2 Wire-Standard.........................................................................................................................22-25
Connectors and Distribution Boxes - Introduction.................................................................................26
M12, 3 and 4 Wire Female ....................................................................................................................27
M8, 4 Wire Female Connectors ............................................................................................................28
M8 and M12, 3 and 4 Wire ....................................................................................................................29
M12, Female and Male PUR.................................................................................................................30
M12, Distribution Boxes ........................................................................................................................31
Technical Definitions and Terminology.............................................................................................32-33
Appendix ..........................................................................................................................................34-35
Index.................................................................................................................................................36-37
Terms and Conditions............................................................................................................................38
CYLINDRICAL INDUCTIVE
PROXIMITY SENSORS
Altech Cylindrical sensors are available in
diameters ranging from 8mm (.32 in.) to
30mm (1.18 in.) with sensing distances up
to 15mm (0.59 in.). Most models feature
nickel plated brass (BN) and stainless
steel (SS). Both flush mount and non-
flush mount sensors are available. Non-
flush sensors have larger sensing
distances than their flush mount
counterparts. All Inductive sensors meet
IP67 (NEMA1, 3, 4, 6, 12, 13) protection
levels.
FLUSH MOUNT
CYLINDRICAL SENSORS
Flush Mounted, sometimes called
embedded or shielded sensors, have
electromagnetic fields concentrated
directly in front of the sensing heads and
may be mounted directly onto metal
mounting brackets or embedded directly
into metal without causing a false output.
Figure 8
(located on page 7)
also
Cylindrical Sensors
illustrates that on Cylindrical Flush Mount
sensors there should be at least 1
diameter of distance between adjacent
sensors, and no non-target metal surfaces
should be less than 3 times the sensing
distance Sn directly across from the
sensing head. Also, two directly opposite
sensors mounted in metal should be
greater than 6 times the sensing distance
apart.
NON-FLUSH
CYLINDRICAL SENSORS
Sometimes called non-embedded or non-
shielded, non-flush sensors have
electromagnetic fields with a wide sensing
angle and are unshielded (no metal
surrounding the sensing head). Care must
be taken to insure that no non-target metal
comes in near proximity to the sensing
head. Distances are demonstrated in
Figure 8.
Adjacent sensors should be
separated by at least 2 times the diameter.
Non-target metal should be at least 3
times the sensing distance directly across
from the sensing head. Two directly
opposite sensors should be at least 6
times the sensing distance apart.
OUTPUT CONNECTIONS
AC,DC – Normally Open (NO),
and Normally Closed (NC).
DC – Complementary output (NO/NC)
available on some models.
OUTPUT CABLES
Cylindrical Sensors are provided with
2 meter PVC fixed cables. 5 meter PVC,
2 and 5 meter PUR cables are optional.
Consult Altech for more information.
QUICK DISCONNECT
CONNECTORS
Altech sensors are available in a wide
selection of Quick Disconnect styles for
DC circuits. Virtually any sensor can be
custom manufactured with a Quick
Disconnect connector.
Consult Altech for
more information.
Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908) 806-9400 • Fax (908) 806-9490
3
Quick Disconnect models are designed
to be user-friendly and to simplify
installation.
Please see the product specification for
sensors
with
quick
disconnect
connectors and matching cable
assemblies on pages
26-31
in the
accessory section.
Cylindrical Sensors
HOUSING MATERIALS
AC – Nickel Plated Brass
DC – Nickel Plated Brass
Stainless Steel
(continued)
Note: We have attempted to make this
catalog as comprehensive as possible.
However, not shown in this catalog are other
Altech Proximity Sensors which are
available. Details on request.
TIP MATERIAL
PBTB – Polybutelyne Terephthalate
Selection Guide
Type
Short Body
Sensing Distances – AC, DC, Cylindrical Style Sensors
Voltage
DC
DC
Flush (mm)
1.5 - 10
1.5 - 10
4-8
AC, DC
Non-Flush (mm)
2 - 15
2 - 15
–
Standard Series
Extended Sensing Range
AC
Operating Voltages – AC, DC Cylindrical Style
20 - 250VAC
10 - 30VDC
250 mA
120 mA
DC
AC
Operating Current– AC, DC Cylindrical Style
250mA
DC
AC
Sensor Wiring Systems – AC, DC Cylindrical Style
2-Wire
2-Wire
3-Wire
DC
All specifications subject to change without notice or obligation
First introduced in the mid 60ʼs, Inductive
Proximity Sensors were designed as an
alternative to mechanical limit switches for
many applications. Initially, IPS's were
made with housings similar in size and
dimension to the limit switch, but had short
The Inductive Proximity Sensor (IPS) is a
solid state device that generates an output
signal when metal objects are either inside
or entering into its sensing area from any
direction. No physical contact is required
nor desired. IPS's work best with ferrous
metals, however, they also work well with
non-ferrous metals (aluminum, brass,
copper, etc.) at reduced sensing distances,
s ee Fi g u r e 1
.
Introduction
sensing distances. Following very good
results with these new devices, market
pressure led to the development of larger
sensors with increased sensing distances.
Fig u r e 1
Rated Operating Distance Correction Factors
Target Material
Mild Steel
Nickel Chromium
Stainless Steel
Brass
Aluminum
Copper
Correction Factor
1.0 x Sn
0.9 x Sn
0.85 x Sn
0.5 x Sn
0.45 x Sn
0.40 x Sn
Inductive Proximity Sensors have no
moving parts, operate very fast, are
extremely reliable, require no maintenance
and operate under extreme environmental
conditions.
They typically interface with Programmable
Logic Controllers (PLC) and personal
computers with appropriate hardware and
software. They also control relays,
solenoids, valves, etc., up to their
maximum output current.
Other Factors
• Flat targets are preferable
• Targets larger than the sensing face
may increase the sensing distance
4
Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908) 806-9400 • Fax (908) 806-9490
Operation
Fig u r e 2
SENSOR CONFIGURATION
An Inductive Proximity Sensor consists of
an oscillator, a ferrite core with coil, a
detector circuit, an output circuit, housing,
and a cable or connector;
s ee Fi g u r e 2
.
The oscillator generates a sine wave of a
fixed frequency. This signal is used to
drive the coil. The coil in conjunction with
the ferrite core induces an electromagnetic
field. When the field lines are interrupted
by a metal object, the oscillator voltage is
reduced proportional to the size and
distance of the object from the coil. The
reduction in the oscillator voltage is
caused by eddy currents induced in the
metal interrupting the field lines. This
reduction in voltage of the oscillator is
detected by the detecting circuit. In
standard sensors, when the oscillator
voltage drops below a present level, an
output signal is generated.
OPERATING VOLTAGES
Most Altech Inductive Proximity Sensors
are available in DC (10-30. VDC), AC
(90-250VAC). Please refer to each
product specification page for specific
operating voltages.
OUTPUT CURRENT
Altech offers a range of IPS's with
different output ratings from 5mA to
500mA. Please refer to each product
specification page for specific output
current.
OUTPUT CONFIGURATION
Outputs may be Normally Open (NO) or
Normally Closed (NC).
electronic output circuits. AC Inductive
Proximity Sensors are 2-wire devices,
except when using a sensor with a metal
housing where a third wire is available for
connection to system ground.
OTHER CONSIDERATIONS:
HOUSING MATERIALS
Altech Inductive Proximity Sensors use a
variety of metallic housing materials.
Please refer to each product specification
for specific information on housing
materials.
SENSORS IN SERIES
AND PARALLEL
Sensors may be wired in series or
parallel. Refer to page
7
for more
information.
Fig u r e 3
CONNECTIONS
Altech offers Inductive Proximity Sensors
that feature either 2 meter fixed PVC
cable or a variety of quick disconnects. All
quick disconnect models require an
optional matching cable assembly.
Custom cable lengths and material
choices are also available. For more
information, please refer to each product
specification or the cable assemblies
section on page
26-31.
FLUSH MOUNT AND
NON-FLUSH MOUNT
Flush Mount sensors are sometimes
called Shielded or Embedded. A metal
band surrounds the sensing head which
contains a coil wound around a ferrite
core as in
Fi g u r e 4
.
ELECTRONIC OUTPUT CIRCUITS
PNP TRANSISTOR
LOAD
NPN TRANSISTOR
LOAD
Flush Installation
SENSOR ELECTRO- MAGNETIC FIELD
Fig u r e 4
DC Inductive Proximity Sensors are
3-wire. A 3 -wire DC sensor can be a NPN
or PNP output transistor. If the output load
is connected to the negative power
source then a sensor with a PNP output
transistor is required. A PNP sensor is
also known as a source sensor. If the
output load is connected to the positive
power source, then a sensor with a NPN
output transistor is required. A NPN
sensor is also known as a sink sensor.
Please see
Fi g u r e 3
for PNP and NPN
The resulting electromagnetic field is
directed in front of the sensor face. Flush
sensors have a narrow sensing field
which may be desirable in certain
applications. In a Non-Flush (Non-
shielded or Non-embedded) sensor;
Fi g u r e 4
, there is no metal band and the
resulting electromagnetic field lines are
much wider than the sensor face. Non-
Flush sensors have a larger sensing
distance than Flush sensors.
Screen
Metal
Band
Non-Flush Installation
Ferrite
Ferrite
Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908) 806-9400 • Fax (908) 806-9490
5
Operation
Fi g u r e 5
(continued)
SENSING DIS TANCE DEFINITIONS
Sr – MFG. TOLERANCES
ACTIVE FACE
ASSURED
OPERATING
RANGE
0.9 Sn
≤
Sr
≤
1.1 Sn
Sn
TARGET
CE MARK
GENERAL INFORMATION
The CE Mark is a compliance symbol,
which means that the product meets the
standards set by the European
Committee for Electrotechnical Stan-
dardization (CENELEC), and the Inter-
national Electrotechnical Commission
(IEC).
Products containing the CE mark are
allowed to have free movement within the
European Union (EU), and European
Economic
Area
(EEA).
Products
manufactured in the USA that are
exported to the EU and EEA should have
the CE marking and utilize components
also having the CE marking.
REFERENCE AXIS
Sa
.81 Sn
≤
Su
≤
1.21 Sn
Su includes temperature, voltage & Mfg. tolerances
PROTECTION (Electrical)
Most of the Inductive Proximity Sensors
Altech offers have short circuit, overload,
reverse polarity, and wire break
protection. Please refer to the Technical
Glossary pages
32-33
and the product
specification for more information.
PROTECTION (Sensor Housing)
All Altech sensors are rated in accordance
with IEC Publication 529, which describes
degrees of protection that enclosures or
sensor housings are designed to provide,
the degree of protection is indicated by
two letters (IP) and two numerals for
additional information see the product
specification and page
34.
All Inductive sensors meet the following
shock and vibration requirements:
30gʼs/11ms, and 10-55 Hz/mm.
SENSING DISTANCE
There are several sensing distance
definitions used in industry. The nominal
sensing distance (Sn), is the conventional
quantity to designate the operational
distance. It is specified in the ordering
pages, and does not include variations in
production tolerances, supply voltage
tolerances, and ambient temperature
tolerances.
The effective sensing distance (Sr), is
measured at nominal supply voltage and
nominal ambient temperature and takes
into account manufacturing tolerances:
0.9 Sn≤Sr≤ 1.1 Sn
The usable sensing distance, (Su), takes
into account temperature, voltage
variations and manufacturing tolerances:
.81 Sn≤ Su ≥ 1.21 Sn
A standard target used to specify sensing
distance is a square piece of mild steel
having a thickness of 1mm (0.04 in.). The
sides of the square are equal to the
diameter of the circle inscribed on the
sensor face or three times the rated
operating distance Sn, whichever is
greater.
MAXIMUM SWITCHING
FREQUENCY
The switching frequency indicates the
maximum number of switching operations
of a sensor per second. The value listed in
the product specifications is achieved with
the conditions shown in
Fi g u r e 7
. The
value is always dependent on target size,
distance from sensing face and speed of
target. Using a smaller target or space
may result in a reduction of a specific
sensor maximum switching frequency.
ACCESSORIES
Altech offers a full range of accessory
products including quick disconnect cable
assemblies, connectors, distribution
boxes, etc. Please refer to each product
specification and the accessory chapter
starting on page
26.
HYSTERESIS
Hysteresis is the switch-on point when the
object approaches the sensor's active
surface, and switch-off point, when the
object is moving away from the sensor's
active surface. Without sufficient
Hysteresis, an Inductive Proximity Sensor
would chatter (continuously switching on
and off), so it is designed into the sensor
circuitry.
The
differential
travel
(Hysteresis) is given as a percent of the
expected rated operating distance Sr.;
See Fi g u r e 6
.
Fig u r e 6
HYSTERESIS
Motion Direction
Switch Off Point
When Leaving
Switch On Point
When Approaching
Target
Hysteresis
Operating
Clearance
Proximity
Sensor
The assured operation distance (Sa) is
the smallest useful sensing distance
which guarantees operation under
variations in temperature, voltage and
manufacture. It is given as 81% of Sn.
See
Fi g u r e 5
. 0<Sa<.81 Sn.
6
Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908) 806-9400 • Fax (908) 806-9490
Operation
(continued)
SWITCHING
FREQUENCY
Fig u r e 7
Fig u r e 8
Flush Mount Installation
(Mild Steel)
D
≥
3 x Sn
D
D
D
CYLINDRICAL SENSOR
INSTALLATION
Non-Flush Mount Installation
(Mild Steel)
D
≥
3 x Sn
2xD
D
D
D
D
D
≥
6 x Sn
Opposing Installation
(Mild Steel)
+
A
–
+
A
–
RL
–
A
RL
+
+
–
+
A
–
–
•
A
–
+
A
–
+
A
–
RL
+
A
–
Series Connection of 2 Wire AC and DC switches
(or Logic):
see previous note for Series connection
of 3 and 4 wire switches. (see
figure C)
Parallel Connection of 2 Wire and AC and DC
switches (or Logic):
It is necessary to take into
account the cumulative no-load currents of each of
the switches which would flow through the load in
the unactuated condition of the switch. This could,
under certain circumstances, trigger the load
without actually operating the switch. (see
figure D)
Parallel Connection of 3 and 4 wire DC switches (or
Logic):
Used when any one of the switches are
required to activate the load. (see
figure B)
Figure A
L1 (+)
L1 (+)
RL
N (–)
Figure C
Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908) 806-9400 • Fax (908) 806-9490
•
•
Series Connection of 3 and 4 wire DC switches (and
Logic):
Used when it is necessary to obtain two or
more corresponding signals before an action is
carried out. It is necessary to take into account the
voltage drop Ud present at the output of each switch
which will reduce the voltage available at the load
correspondingly. (see
figure A)
Series and Parallel Connection of Proximity Sensors
PNP
+
NPN
+
PNP
NPN
RL
Figure B
RL
N (–)
Figure D
7
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
