Balluff BTL7 Series Manuale utente

User's Guide

english

BTL7-A/C/E/G5 __ -M ____ -K(8)-SR32/SR115/___

www.balluff.com

www.balluff.com 3english

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

www.balluff.com 7english

Fig. 3-1:

30°

34 40-1

Ø D1

Ø 18 h6

20.5

Ø 79

Ø 64

Ø 6.4

Ø 11

20.5

11.520

~18

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

Nominal length =

Measuring range

6 holes to fasten

the transducer

BTL7-A/C/E/G5__-M____-K(8)-SR32/SR115/___

Micropulse Transducer - Rod Style

8english

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

www.balluff.com 9english

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

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

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