Balluff BTL7 Series User manual

User's Guide
english
BTL7-A/C/E/G5 __ -M ____ -K(8)-SR32/SR115/___

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BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style
1 Notes to the user 5
1.1 Validity 5
1.2 Symbols and conventions 5
1.3 Scope of delivery 5
1.4 Approvals and markings 5
2 Safety 6
2.1 Intended use 6
2.2 General safety notes for the linear encoder 6
2.3 Explanation of the warnings 6
2.4 Disposal 6
3 Construction and function 7
3.1 Construction 7
3.2 Function 7
4 Installation and connection 8
4.1 Installation guidelines 8
4.2 Preparing for installation 8
4.3 Installing the transducer 9
4.3.1 Installation recommendation for hydraulic cylinders 9
4.4 Electrical connection 10
4.4.1 Connector SR32 10
4.4.2 Connector SR115 10
4.4.3 Cable connection 11
4.5 Shielding and cable routing 11
5 Startup 12
5.1 Starting up the system 12
5.2 Operating notes 12
6 Calibration procedure 13
6.1 Programming inputs 13
6.2 Calibration procedure notes 13
6.3 Calibration procedure overview 14
6.3.1 Teach-in 14
6.3.2 Adjusting 15
6.3.3 Reset 15
7 Teach-in 16
8 Adjusting 17
9 Resetting all values (reset) 19
10 Technical data 20
10.1 Accuracy 20
10.2 Ambient conditions2) 20
10.3 Supply voltage (external) 20
10.4 Output 20
10.5 Input 20
10.6 Dimensions, weights 21

4english
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style
11 Accessories 22
11.1 Magnets 22
11.2 Connectors and cables 23
11.2.1 BKS-S32/S33M-00, freely configurable 23
11.2.2 BKS-S232/S233-PU-_ _, preassembled 23
11.2.3 BKS-S115/S116-PU-_ _, preassembled 24
11.3 Calibration box 24
12 Type code breakdown 25
13 Appendix 26
13.1 Converting units of length 26
13.2 Part label 26

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1.1 Validity
This guide describes the construction, function and setup
options for the BTL7 Micropulse Transducer with analog
interface. It applies to types
BTL7-A/C/E/G5 __ -M ____ -K(8)-SR32/SR115/___
(see Type code breakdown on page25).
The guide is intended for qualified technical personnel.
Read this guide before installing and operating the
transducer.
1.2 Symbols and conventions
Individual instructions are indicated by a preceding
triangle.
►Instruction 1
Action sequences are numbered consecutively:
1. Instruction 1
2. Instruction 2
Note, tip
This symbol indicates general notes.
1.3 Scope of delivery
– BTL7 transducer
– 6 mounting screws
– Condensed guide
The magnets are available in various models
and must be ordered separately.
1.4 Approvals and markings
UL approval 1)
File no.
E227256
1) Not for BTL7-…-F_ _
US Patent 5923164
The US patent was awarded in connection with this pro-
duct.
The CE Mark verifies that our products
meet the requirements of the current
EMC Directive.
The transducer meets the requirements of the following
product standard:
– EN61326-2-3 (noise immunity and emission)
Emission tests:
– RF emission
EN55011
Noise immunity tests:
– Static electricity (ESD)
EN 61000-4-2 Severity level3
– Electromagnetic fields (RFI)
EN 61000-4-3 Severity level3
– Electrical fast transients (burst)
EN 61000-4-4 Severity level3
– Surge
EN 61000-4-5 Severity level2
– Conducted interference induced
by high-frequency fields
EN 61000-4-6 Severity level3
– Magnetic fields
EN 61000-4-8 Severity level4
More detailed information on the guidelines,
approvals, and standards is included in the
declaration of conformity.
1 Notes to the user
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style

6english
2.1 Intended use
The Micropulse Transducer, together with a machine
controller (e.g. PLC), comprises a linear encoder. It is
intended to be installed into a machine or system. Flawless
function in accordance with the specifications in the
technical data is ensured only when using original
BALLUFF accessories. Use of any other components will
void the warranty.
Opening the transducer or non-approved use are not
permitted and will result in the loss of warranty and liability
claims against the manufacturer.
2.2 General safety notes for the linear encoder
Installation and startup may only be performed by
trained specialists with basic electrical knowledge.
Qualified personnel are those who can recognize
possible hazards and institute the appropriate safety
measures due to their professional training, knowledge,
and experience, as well as their understanding of the
relevant regulations pertaining to the work to be done.
The operator is responsible for ensuring that local safety
regulations are observed.
In particular, the operator must take steps to ensure that a
defect in the linear encoder will not result in hazards to
persons or equipment.
If defects and unresolvable faults occur in the transducer, it
should be taken out of service and secured against
unauthorized use.
2.3 Explanation of the warnings
Always observe the warnings in these instructions and the
measures described to avoid hazards.
The warnings used here contain various signal words and
are structured as follows:
SIGNAL WORD
Hazard type and source
Consequences if not complied with
►Measures to avoid hazards
The individual signal words mean:
NOTICE!
Identifies a hazard that could damage or destroy the
product.
DANGER
The general warning symbol in conjunction with the
signal word DANGER identifies a hazard which, if not
avoided, will certainly result in death or serious
injury.
2.4 Disposal
►Observe the national regulations for disposal.
2 Safety
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style

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Fig. 3-1:
30°
34 40-1
6
Ø D1
Ø 18 h6
60
25
20.5
G
Ø 79
Ø 64
Ø 6.4
Ø 11
86
20.5
20.5
11.520
~18
6
Version D1 G
…-K-… 10.2 mm Thread
M4x4/6deep
…-K8-… 8 mm No thread
BTL7-…-K(8)-… transducer, construction and function
3.1 Construction
Electrical connection: The electrical connection is made
via a cable or a connector (see Type code breakdown on
page25).
Housing: Housing containing the processing electronics.
Fastening: For secure fastening, tighten the transducer
with cylinder screws (ISO4762, M6×16-A2-70) at all
6mounting holes (see Fig. 3-1). All screws must be
tightened with 3.5Nm.
The transducers with Ø 10.2 mm have an additional thread
at the end of the rod to support larger nominal lengths.
Magnet: Defines the position to be measured on the
waveguide. Magnets are available in various models and
must be ordered separately (see Accessories on
page22).
Nominal length: Defines the available measuring range.
Rods with various nominal lengths from 25 mm to
7620mm are available depending on the version:
– Ø10.2mm: Nominal length from 25mm to 7620mm
– Ø8mm: Nominal length from 25mm to 1016mm
Damping zone: Area at the end of the rod that cannot be
used for measurements, but which may be passed over.
3.2 Function
The Micropulse Transducer contains the waveguide which
is protected by an outer stainless steel tube (rod). A
magnet is moved along the waveguide. This magnet is
connected to the system part whose position is to be
determined.
The magnet defines the position to be measured on the
waveguide.
An internally generated INIT pulse interacts with the
magnetic field of the magnet to generate a torsional wave
in the waveguide which propagates at ultrasonic speed.
The component of the torsional wave which arrives at the
end of the waveguide is absorbed in the damping zone to
prevent reflection. The component of the torsional wave
which arrives at the beginning of the waveguide is
converted by a coil into an electrical signal. The travel time
of the wave is used to calculate the position. Depending
on the version, this information is made available as a
voltage or current output with a rising or falling gradient.
3 Construction and function
BTL7…-SR32
BTL7…-SR115 BTL7… cable
Mounting
surface
1) Unusable area
2) Not included in scope of delivery
Damping zone
Magnet
1)
Nominal length =
Measuring range
2)
1)
6 holes to fasten
the transducer
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style

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4.1 Installation guidelines
Non-magnetizable material
Magnet
Non-magnetizable material
1) Min. ØD2= Minimum diameter of the bore (seeTab. 4-1)
Fig. 4-1: Installation in non-magnetizable material
Magnetizable material
If using magnetizable material, the transducer must be
protected against magnetic interference through suitable
measures (e.g. spacer ring made of non-magnetizable
material, a suitable distance from strong external magnetic
fields).
Spacer ring made of non-magnetizable
material
Magnet
min. Ø D21)
Spacer ring made of non-magnetizable
material
Magnet
1) Min.ØD2=Minimum diameter of the bore (seeTab. 4-1)
Fig. 4-2: Installation in magnetizable material
Tube diameter Bore diameter D2
10.2mm At least 13mm
8mm At least 11mm
Tab. 4-1: Bore diameter if installed in a hydraulic cylinder
4.2 Preparing for installation
Installation note: We recommend using non-
magnetizable material to mount the transducer and
magnet.
Horizontal assembly: For horizontal assembly with
nominal lengths > 500 mm, support the rod and tighten it
at the end if necessary (only possible with a diameter of
10.2mm).
Hydraulic cylinder: If installed in a hydraulic cylinder,
ensure that the minimum value for the bore diameter of the
support piston is complied with (seeTab. 4-1).
Fitting bore: The mounting surface of the transducer
housing must make full contact with the supporting
surface. A suitable O-ring must completely seal the bore,
i.e. the countersink for the O-ring must be produced in
accordance with Fig. 4-3.
Fig. 4-3: Fitting bore for installing the BTL with O-ring
Magnet: Various magnets are available for the BTL7
transducer (See Accessories on page22).
4 Installation and connection
Fitting bore
Countersink for
O-ring 15.4×2.1
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style

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4.3 Installing the transducer
NOTICE!
Interference in function
Improper installation can compromise the function of the
transducer and result in increased wear.
►The mounting surface of the transducer must make
full contact with the supporting surface.
►The bore must be perfectly sealed (O-ring/flat seal).
►For secure fastening, tighten the transducer with
cylinder screws (ISO4762, M6×16-A2-70) at all
6mounting holes.
►All screws must be tightened with 3.5Nm.
►Install the magnet (accessories).
►From 500mm nominal length: support the rod and
tighten it at the end if necessary (only possible with a
diameter of 10.2mm).
4.3.1 Installation recommendation for hydraulic
cylinders
If you seal the hole with a flat seal, the max. operating
pressure will be reduced in accordance with the larger
pressurized surface.
If installing horizontally in a hydraulic cylinder (nominal
lengths>500mm), we recommend affixing a slide element
to protect the rod end from wear.
Dimensioning of the detailed solutions is the
responsibility of the cylinder manufacturer.
The slide element material must be suitable for the
appropriate load case, medium used, and application
temperatures. E.g. Torlon, Teflon or bronze are all possible
materials.
Fig. 4-4:
Slide element
Magnet
Example 1, transducer installed with slide element
The slide element can be screwed on or bonded.
►Secure the screws so they cannot be loosened or lost.
►Select a suitable adhesive.
Slide element
Rod
Piston rod
Slide surface
Flow gap
Fig. 4-5: Detailed view and top view of slide element
There must be a gap between the slide element and piston
bore that is sufficiently large for the hydraulic oil to flow
through.
Options for fixing the magnet:
– Screws
– Threaded ring
– Press fitting
– Notches (center punching)
If installed in a hydraulic cylinder, the magnet
should not make contact with the rod.
The hole in the spacer ring must ensure optimum guidance
of the rod by the slide element.
Fig. 4-6:
Spacer ring
Magnet
Fixing of magnet
Fixing of magnet
An example of how to install the transducer with a
supporting rod is shown in Fig. 4-7 on page10.
4Installation and connection (continued)
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style

10 english
Fig. 4-7:
Magnet
(e.g. BTL-P-1028-15R)
Supporting rod made of non-magnetizable material
Example2, transducer installed with supporting rod
4.4 Electrical connection
Depending on the model, the electrical connection is made
using a cable or a connector (BTL7…-SR32, BTL7…-SR115).
The connection or pin assignments for the respective version
can be found in Tab. 4-2 to Tab. 4-4.
Note the information on shielding and cable
routing on page11.
4Installation and connection (continued)
4.4.1 Connector SR32
Pin -A510 -G510 -C500 -C570 -E500 -E570
Fig. 4-8: Pin assignment of SR32 (view
from above on transducer), 8-pin
M16 circular plug
1 Not used1) 0…20 mA 20…0 mA 4…20 mA 20…4 mA
2 0 V
3 10…0V 10…–10V 10…0V3)
4 La (programming input)
5 0…10V –10…10V 0…10V3)
6 GND2)
7 10…30V
8 Lb (programming input)
1) Unassigned leads can be connected to the GND on the controller side but not to the shield.
2) Reference potential for supply voltage and EMC-GND.
3) The voltage outputs may exhibit a minimal offset to the harmonized current output.
Tab. 4-2: Connection assignment BTL7…-SR32
4.4.2 Connector SR115
Pin -A510 -G510 -C500 -C570 -E500 -E570
Fig. 4-9: Pin assignment of SR115 (view
from above on transducer), 8-pin
M12 circular plug
1 0 V (pin 3) Not used1)
2 0 V (pin 5)
3 10…0V 10…–10V Not used1)
4 La (programming input)
5 0…10V –10…10V 0…20 mA 20…0 mA 4…20 mA 20…4 mA
6 GND2)
7 10…30V
8 Lb (programming input)
1) Unassigned leads can be connected to the GND on the controller side but not to the shield.
2) Reference potential for supply voltage and EMC-GND.
Tab. 4-3: Connection assignment BTL7…-SR115
BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___
Micropulse Transducer - Rod Style