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BA IRxx.DxxL
User Manual
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Baumer BA IRxx.DxxL User Manual

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Operating Instructions
Inductive distance measuring sensors with Teach-In
Contents
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1 General information
NOTE
Provides helpful operating instructions or other general recommendations.
ATTENTION!
Indicates a possibly hazardous situation. If it is not avoided, minor or slight injuries can occur or the device can be damaged.
Read these operating instructions carefully and follow the safety instructions!
1.1 Applicability
This document is applicable for all Baumer inductive distance measuring sensors (or analog inductive sensors) with a teach-in:
IR08.DxxL  IR12.DxxL  IR18.DxxL
1.2 Concerning the contents of this document
This manual contains information about the installation and commissioning of Baumer analog inductive sensors. It is a supplement to the mounting instructions supplied with each sensor.
1.3 Intended use
The Baumer analog inductive sensors are able to detect the position of a metallic object which is within the measuring range of the sensor. It was especially developed for easy handling, flexible use, and precise measurement.
1.4 Safety notes
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2 Connection
ATTENTION!
The IP protection class is valid only if all connections are connected as described in the technical documentation.
ATTENTION!
Connection, installation and commissioning may only be performed by qualified personnel.
ATTENTION!
Incorrect supply voltage might destroy the device!
NOTE
How to connect outputs if they are not needed in an application:
teach output: connect to GND (0V)  digital output: do not connect  analog output: do not connect
2.1 Connection cable
The sensors do not require a shielded cable in standard conditions. If the EMC requirements a higher a shielded cable may be used on the connector versions of these sensors. Depending on the screening concept the shield must be connected accordingly.
2.2 Pin assignment and connection diagram
The standard pin out for sensors with M12 connector is as follows
Check in the mounting instructions, which are delivered with each sensor, if your sensor has the same pin configuration. In addition, the allowable supply voltage is also stated there.
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3 Installation
ATTENTION!
Connection, installation and commissioning may only be performed by qualified personnel.
NOTE
Angle deviations can affect measuring accuracy.
Metallic object
Distance s
Direction of movement
Sensor
3.1 Mounting
The sensors have a threaded housing and can be fixed with the nuts which are part of the delivery. The maximal mounting torque is depending on the housing material and the thread size:
Stainless steel thread
o M8 = 10 Nm o M12 = 20 Nm o M18 = 55 Nm
Brass nickel plated thread
o M8 = 7 Nm o M12 = 15 Nm o M18 = 40 Nm
Reduce torque values by 30 % at the sensor’s face. The position and the material of the nuts can have an influence on the analog output curve, see chapter 4.4.
3.2 Factory Settings
In the mounting instructions it is described how the sensors behave once they leave the factory or if the factory reset teach procedure is activated.
3.3 Sensor alignment
As standard the sensor is mounted at a right angle (90°) to the object (standard installation).
Other sensor alignments are possible; please contact Baumer for further guidance.
3.4 Installation accessories
To ensure optimal mounting, various mounting brackets are available an as accessory, see www.baumer.com.
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4 Functions and definitions
4.1 General function
An analog inductive sensor changes its output value (typically current or voltage) depending on the position of electrically conductive material in the vicinity of the sensing tip. Hence, it can be used to measure the position of an object which moves.
4.2 Standard conditions
Both the geometry and the material of the object to be measured have an influence on the analog output curve of an inductive sensor. In addition, the conductive material which is in the vicinity of the sensor front face might influence the sensor output. Therefore, the standard measurement conditions are defined as follows:
Standard object (according EN 60947-5-2): The standard target is defined as a square plate, 1 mm
thick, made of Fe 360 (mild steel). The length of its side is defined as the larger of either the sensing face diameter or three times the maximal sensing distance as noted in the data sheet. For example: the standard target for an M12 sensors with 6mm sensing range has a side length of 3x6=18mm. On the datasheet or the installation instructions the reference target is listed.
Standard installation conditions: In order to have reproducible measurement conditions the standard
installation of these sensors is non-flush, this means there is no electrically conductive material (except the object to be measured) within the vicinity (2x maximal sensing range) of the sensor front face. For an M18 sensor with 8mm sensing range, this means for example that the nut may only be
positioned 2x8=16mm away from the sensing face. The technical data shown on the data sheet are valid for these standard conditions (in particular: linearity and maximal sensing range).
4.3 Object to be measured
In practice, the geometry and the material of the object which moves (also called the target) will differ from the standard object. The influences can be estimated as follows:
Size: If the object is smaller than the standard object, the maximal sensing range will be reduced. This
means that the output will reach its maximum at shorter distance. If the object is larger than the
standard object, there will be only minimal influences.
Material: If the material is different from mild steel this will typically reduce the sensing range. The
minimal distance at which a useful signal can be measured will be larger; the maximal sensing will be
smaller. The following diagram shows the influence of the target material:
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Mounting situation
Sketch of mounting situation
Non-flush: There is no conductive material in the vicinity (>3x maximal sensing range) of the sensing tip.
Conductive material
Sensor
>3x Sd
Diagram: Sensor output (typical values) influenced by different materials of the target when then sensor is mounted non-flush
The diagram above shows that the target material influences slightly the linearity and the measuring of inductive linear sensors. The sensors are optimized for delivering optimal performance on mild steel. Please consult Baumer if you need a better performance on other materials.
4.4 Influence of mounting situation
The largest influence for an inductive sensor is conductive material which is close to the sensing face. Depending on the material of the sensor and the conductivity of the material which is close to the sensor the output curve is changed more or less. The following mounting situations can be distinguished:
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Quasi-flush: There is no conductive material directly around the sensing tip, but at a small distance behind (1/3x Sd)
Flush (in conductive material): The sensor is fully embedded in conductive material.
Flush mounting in non-conductive material, e.g. plastic, does not influence the sensing behavior.
Conductive material
Sensor
Conductive material
Sensor
1/3x Sd
The following diagram shows the influence of the mounting situation in different materials and different distances to the sensing tip.
Diagram: Sensor output (typical values) influenced by different mounting situation (material and position)
The curves above show that the IR12.D06L sensors only experience very little effect of the way they are mounted if the sensing distance is smaller than 50% of the maximal sensing distance or if the sensors are mounted quasi-flush or non-flush. Non magnetic materials such as brass or copper show a similar behavior as aluminum.
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4.5 Teach-in procedure
Sensor
Teach level 1
Teach level 2
Teach level 3
IR12.D06L-xxx
1-point teach analog
Window teach digital
Factory reset
IR18.D08L-xxx
1-point teach analog
Window teach digital
Factory reset
Position
object at
distance «A»
Connect
teach wire with +V (2s). When yellow
LED starts flashing with
1 Hz , cut
connection
Connect
teach wire
shortly
(>0.2s) with
+V
Wait 4s
(yellow LED
keeps
flashing)
Red LED
flashes
shortly
Teach
finished
Distance
Sd max
10V/20mA
A
0V/4mA
slope
4.5.1 General concepts
Baumer inductive sensors with a linearized output can be configured for the following reasons:
Compensate tolerances (mechanical tolerances at installation, variation in target geometry and
material, variation of sensors): here typically a 1-point teach is useful.
Quick setup of sensors: 1-point teach is useful as it allows mount the sensor without the need of
respecting very high tolerances
Get maximal system accuracy: With 2-point teach is most useful as the minimal and maximal distance
can be defined. This allows adjusting the measuring range of a sensor to the distance relevant in an application.
Set a digital alarm or indicate a valid/invalid position: sensors which have an additional digital output
can be set to deliver a high output value only if an object is within a defined measuring range.
Set sensor to a defined state: factory reset
The teach procedure always requires to connect the teach wire with the positive supply voltage of the sensor (+Vs). Depending on how long this connection is made different teach-in procedures can be used. Sensors which have an LED indicate that the teach-in procedure is started by the blinking of the yellow LED.
Baumer sensors with teach-in have typically three teach levels which can be activated. Each teach level might have a sub variant for teaching. The different sensors have the following teach capabilities:
4.5.2 Teach of analog output
4.5.2.1 1-point teach
The 1-point teach is typically used in applications where a quick setup is required and where the installation tolerances shall be compensated. Two situations can be distinguished:
1) When the sensor is taught, the target is at the minimal distance (designated “A” in the lower graph). In the application the target only moves away from the sensor. In this situation it is recommended to teach the sensor in a way such that it has 0V (or 4mA) at the minimal position.
Teach procedure: 1-point teach (object is close and moves away from sensor)
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Position object
at distance «B»
Connect teach
wire with +V
(2s). When yellow LED
starts flashing
with 1Hz, cut
connection
Connect teach
wire shortly
(>0.2s) with +V
Within 4s:
Connect teach
wire shortly
(>0.2s) with +V
(yellow LED
keeps flashing)
Red LED
flashes shortly
Teach
finished
Position object at distance
«A»
Connect
teach wire with +V (4s). When yellow
LED starts
flashing with
2 Hz , cut
connection
Connect
teach wire
shortly
(>0.2s) with
+V.
Position object at distance
«B»
Connect
teach wire
shortly
(>0.2s) with
+V.
Red LED
flashes
shortly
Teach
finished
Sd max
Vmax
Vmin
Digital output A<B
B
A
Sd max
Vmax
Vmin
Digital output A>B
A B Distance
Sd max
10V/20mA
B
0V/4mA
slope
2) When the sensor is taught, the target is at the maximal distance to the sensor (designated “B” in the lower graph). This means that during the application the target only comes closer to the sensor. In this situation it is recommended to teach the sensor in a way such that it has 10V (or 20mA) at the maximal position.
Teach procedure: 1-point teach (object is far away and moves towards sensor)
4.5.3 Window teach of digital output
The window teach on the digital output is typically used in order to define a range in which the application is valid or not valid. The object has to be positioned at position A and B. Depending on whether the position A or B is closer to sensor the output signal is as follows:
Teach procedure: window teach for digital output
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4.5.4 Factory reset
Connect teach wire with +V (6s). When
yellow LED starts
flashing with 4 Hz,
cut connection
Red LED
flashes
shortly
Teach
finished
This sets the sensor to the settings which the sensor has when it is leaves the factory. In the mounting instructions which are delivered with each sensor it is defined how a sensor behaves after factory reset.
Teach procedure: factory reset
5 Safety instructions and maintenance
5.1 General safety instructions
Intended use
This product is a precision device and is used for object detection and the preparation and/or provision of measuring values as electrical quantities for a subsequent system. Unless this product is specially labeled, it may not be used for operation in potentially explosive environments.
Commissioning
Installation, mounting and adjustment of this product may be performed only by a qualified person.
Installation
For mounting, use only the mechanical mountings and mechanical mounting accessories intended for this product. Unused outputs must not be wired. In cable versions with unused cores, these cores must be insulated. Always comply with admissible cable bending radii. Prior to electrical connection of the product, the system must be disconnected from the power supply. In areas where shielded cables are mandatory, they must be used as protection against electromagnetic disturbances. If plug connections to shielded cables are made by the customer, an EMC version of the connectors should be used, and the shield must be connected to the connector housing across a large area.
5.2 Maintenance
Inductive sensors do not require any maintenance or cleaning.
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6 Error correction and tips
Error
Error correction
Linearity of the output does not meet the expectations
Change the geometry and material of the target to match as closely as possible to the standard target. If this is not possible, ask Baumer for a customized version.
Slope is not steep enough
Use larger target or ask Baumer for a customized version.
The digital output is switching differently if an object is approaching or leaving.
This is due to the hysteresis of the sensor in order to guarantee stable behavior. 2014-11-10
simg
Manual released in version 1.0
6.1 Error correction
7 Change History
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