HBM T4A Manual de usuario

B 23.T4WA.11 e

Torque/Screw Torque Transducer

T4A, T4WA-S3

Mounting instructions

Electrical

measurement

of mechanical

quantities

HBM Mess- und Systemtechnik GmbH

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Contents Page

Safety instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Application 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Mounting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Mounting position 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Fixing the enclosure in place 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Electrical connection 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 T4A pin assignment (torque) 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 T4WA-S3 pin assignment (torque) 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 T4WA-S3 pin assignment (speed/angle

of rotation) 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Cable extension 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Shielding design 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Loading capacity 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Maximum rotation speed 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Measuring dynamic torques 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Displaying torque and direction of rotation 12. . . . . . . . . . . . . . . . . . . . . .

6 Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Dimensions 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Specifications 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9 Accessories 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 Copy of Declaration of Conformity 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4T4A, T4WA-S3

Safety instructions

Appropriate use

The T4A, T4WA–S3 torque/screw torque transducer may be used for torque

measurement and directly related control and regulation tasks only. Any other

use is not appropriate.

To ensure safe operation, the transducer may only be used according to the

specifications given in this manual. When using the transducer, the legal and

safety regulations for the respective application must also be observed. The

same applies if accessories are used.

The transducer is not a safety device in accordance with the regulations for

appropriate use. For correct and safe operation of this transducer it is

essential to ensure technically correct transportation, storage, installation and

fitting, and to operate all equipment with care.

General dangers in the case of non–observance of the safety

instructions

The transducer complies with the state of the art and is fail safe. If the

transducer is used and operated inappropriately by untrained personnel,

residual dangers may arise.

Anyone responsible for installing, operating, maintaining or repairing this

transducer must be sure to have read and understood the operating manual

and in particular the notes on safety.

Residual dangers

The scope of performance and supply of this transducer covers only part of

the torque measurement technology. In addition, those involved in planning,

constructing and operating the safety engineering aspects of torque

measurement technology must design, produce and take responsibility for

such measures in order to minimise potential residual dangers. Prevailing

regulations must be complied with at all times. There must be a clear

reference to the residual dangers connected with measurement technology.

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T4A, T4WA-S3

In this manual, the following symbols are used to refer to residual dangers:

Symbol: DANGER

Meaning: Maximum danger level

Warns of an imminently dangerous situation in which failure to comply with

safety requirements will result in death or serious physical injury.

Symbol: WARNING

Meaning: Potentially dangerous situation

Warns of a potentially dangerous situation in which failure to comply with

safety requirements can result in death or serious physical injury.

Symbol: CAUTION

Meaning: Potentially dangerous situation

Warns of a potentially dangerous situation in which failure to comply with

safety requirements could result in damage to property or some form of

physical injury.

Symbol: NOTE

Means that important information about the product or its handling is being

given.

Symbol:

Meaning: CE mark

The CE mark enables the manufacturer to guarantee that the product

complies with the requirements of the relevant EC guidelines (see Declaration

of Conformity at the end of these Mounting Instructions).

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6T4A, T4WA-S3

Reconstruction and modifications

HBM’s express consent is required for modifications affecting the transducer’s

construction and safety. HBM does not take responsibility for damage

resulting from unauthorised modifications.

Qualified personnel

The transducer may be used by qualified personnel only; the technical data

and the special safety regulations must be observed in all cases. When using

the transducer, the legal and safety regulations for the respective application

must also be observed. The same applies if accessories are used.

Qualified personnel means: personnel familiar with the installation, fitting,

start–up and operation of the product, and trained according to their job.

WARNING

According to prevailing accident prevention regulations, after fitting the

torque/screw torque transducer a cover must be fitted as follows:

•The cover must not be able to rotate.

•The cover shall protect against crushing or cutting and provide protection

against parts that might come loose.

•The cover shall be installed at a safe distance from moving parts or shall

prevent anyone putting their hand inside.

•The cover shall even be fitted if the moving parts are installed in areas to

which persons do not usually have access.

The above regulations may only be disregarded if machine parts are already

sufficiently protected owing to the design of the machine or because other

precautions have been taken.

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T4A, T4WA-S3

1 Application

T4A, T4WA-S3 torque/screw torque transducers measure constant and

varying torques for any direction of rotation. T4WA-S3 transducers also

measure the speed or angle of rotation.

The transducers can be used in conjunction with either manual or motorised

screwdrivers (but not impact wrenches).

To enable wrenches and other bolting tools to be fitted, the transducer

providesan internal square on the input side and an external square on the

output side, both to DIN 3121.

2 Mounting

2.1 Mounting position

The torque/screw torque transducers can be fitted in any position. When

installed horizontally, make sure that the identification plate is not pointing

downward (to prevent the risk of a short circuit due to the accumulation of

worn carbon on the printed circuit board).

Right Wrong

2.2 Fixing the enclosure in place

Bearing friction is very low in the case of screw torque transducers.

This means that the enclosure need only be secured against induced rotation.

For this purpose a size M4 (or M6) tapped hole is provided in the enclosure,

on the output side, into which you may screw a suitable stop (such as a

threaded bar).

The twist–proof fixing must have enough axial and radial play to ensure that

no deformation arises between the enclosure and the rotor.

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8T4A, T4WA-S3

3 Electrical connection

T4A torque/ screw torque transducers are delivered complete with one

3m–long, unterminated connection cable. The T4WA-S3 versions are

delivered complete with two such cables.

NOTE

If you require a plug assembly, please be sure to specify the measuring

amplifier type, and for system devices also specify the connection board

you are using.

3.1 T4A pin assignment (torque)

Wire colour Function

White (wh) Measurement signal torque (+)

Black (bk) Excitation voltage (–)

Blue (bu) Excitation voltage (+)

Red (rd) Measurement signal torque (–)

Yellow (ye) Cable shield to housing ground

3.2 T4WA-S3 pin assignment (torque)

Wire colour Function

White (wh) Measurement signal torque (+)

Black (bk) Excitation voltage (–)

Blue (bu) Excitation voltage (+)

Red (rd) Measurement signal torque (–)

Grey (gy) Sensor circuit (–)

Green (gn) Sensor circuit (+)

Yellow (ye) Cable shield to housing ground

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T4A, T4WA-S3

3.3 T4WA-S3 pin assignment (speed/angle of rotation)

Wire colour Function

Black (bk) Zero operating voltage

Red (rd) Supply voltage for speed measuring system

Green (gn) Measurement signal for speed/angle of rotation

Grey (gy) Measurement signal for speed/angle of rotation (90°

phase–shifted)

Yellow (ye) Cable shield to housing ground

3.4 Cable extension

Extension cables must be the shielded, low–capacitance type. We

recommend the use of HBM cables that comply with these requirements.

When using cable extensions, ensure that the connection is perfect, with the

lowest possible contact resistance and good insulation. For this reason all

connections should be soldered, or at the very least should use firmly fixed

terminals or screwed connectors.

Measurement cables should not be laid parallel to high–voltage lines or

control circuits (and therefore should not be laid in common cable shafts). If

this is not possible, protect the measurement cable with, for example,

armoured steel tubing and keep them as far away as possible from other

cables. Guard against stray fields from transformers, motors and contactors.

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10 T4A, T4WA-S3

T4A cable extension:

The T4A torque/screw torque transducer uses a 4–wire connectiontechnique.

If you wish to add a cable extension, this must be carried out using the 6-wire

connection technique. In this case the sensor circuits in the extension cable

must be connected to the bridge excitation circuits of the transducer (for

information on feedback bridges, see Fig.3.1).

Feedback

bridges

Measurement signal (+) wh. . . . . . . . .

Excitation voltage (+) bu. . . . . . . . . . . .

Sensor circuit (–)gy. . . . . . . . . . . . . . .

Sensor circuit (+) gn. . . . . . . . . . . . . . . .

Excitation voltage (–)bk. . . . . . . . . . . .

Measurement signal (–)rd. . . . . . . . .

Cable shield

T4A Extension cable

Fig.3.1: T4A cable extension

T4WA-S3 cable extension:

The T4WA-S3 torque/screw torque transducer uses the 6–wire connection

technique. A cable extension can be added with no difficulty using 6-wire

connection technique.

3.5 Shielding design

The cable shield is connected according to the HBM Greenline concept, thus

enclosing the measuring system (without rotor) in a Faraday cage (for this it is

important that the shielding on both cable ends is laid flat to the body of the

casing) and preventing potential electromagnetic interference from affecting

the measuring signal.

In the case of interferences due to potential differences (compensating

currents), operating-voltage zero and housing ground must be disconnected

on the amplifier and a potential-equilibration line between stator housing and

amplifier housing must be established (copper conductor, 10mm2wire

cross-section).

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