Siemens SLI-5310 Instruções de Operação descarregar pdf (Página 40)

General mechanical information

UL certiﬁ cation

All rotary encoders in this brochure comply

with the UL safety regulations for the USA

and the “CSA” safety regulations for

Canada.

Acceleration

Encoders are subject to various types of

acceleration during operation and

mounting.

• Vibration

The encoders are qualiﬁ ed on a test

stand to operate with the speciﬁ ed

acceleration values at frequencies from

55 to 2 000 Hz in accordance with

EN 60 068-2-6. However, if the

application or poor mounting causes

long-lasting resonant vibration, it can

limit performance or even damage the

encoder. Comprehensive tests of the

entire system are required.

• Shock

The encoders are qualiﬁ ed on a test

stand for non-repetitive semi-sinusoidal

shock to operate with the speciﬁ ed

acceleration values and duration in

accordance with EN 60 068-2-27. This

does not include permanent shock

loads, which must be tested in the

application.

• The maximum angular acceleration is

rad/s

(DIN 32878). This is the

highest permissible acceleration at which

the rotor will rotate without damage to

the encoder. The angular acceleration

actually attainable depends on the shaft

connection. A sufﬁ cient safety factor is

to be determined through system tests.

Other values for rotary encoders with

functional safety are provided in the

corresponding product information

documents.

Humidity

The max. permissible relative humidity is

75 %. 95 % is permissible temporarily.

Condensation is not permissible.

Magnetic ﬁ elds

Magnetic ﬁ elds > 30 mT can impair the

proper function of encoders. If required,

please contact HEIDENHAIN, Traunreut.

RoHS

HEIDENHAIN has tested the products for

harmlessness of the materials as per

European Directives 2002/95/EC (RoHS)

and 2002/96/EC (WEEE). For a

Manufacturer’s Declaration on RoHS,

please refer to your sales agency.

Natural frequencies

The rotor and the couplings of ROC/ROQ/

ROD and RIC/RIQ rotary encoders, as also

the stator and stator coupling of ECN/EQN/

ERN rotary encoders, form a single

vibrating spring-mass system.

The natural frequency f

should be as

high as possible. A prerequisite for the

highest possible natural frequency on

ROC/ROQ/ROD or RIC/RIQ rotary

encoders is the use of a diaphragm

coupling with a high torsional rigidity C

(see Shaft couplings).

2 · à



: Natural frequency of the coupling in Hz

C: Torsional rigidity of the coupling in

Nm/rad

I: Moment of inertia of the rotor in kgm

ECN/EQN/ERN rotary encoders with their

stator couplings form a vibrating spring-

mass system whose natural frequency f

should be as high as possible. If radial and/

or axial acceleration forces are added, the

rigidity of the encoder bearings and the en-

coder stators is also signiﬁ cant. If such

loads occur in your application, HEIDEN-

HAIN recommends consulting with the

main facility in Traunreut.

Protection against contact (EN 60 529)

After encoder installation, all rotating parts

must be protected against accidental

contact during operation.

Protection (EN 60 529)

The degree of protection shown in the

catalog is adapted to the usual mounting

conditions. You will ﬁ nd the respective

values in the Speciﬁ cations. If the given

degree of protection is not sufﬁ cient (such

as when the encoders are mounted

vertically), the encoders should be

protected by suited measures such as

covers, labyrinth seals, or other methods.

Splash water must not contain any

substances that would have harmful

effects on the encoder parts.

Noise emission

Running noise can occur during operation,

particularly when encoders with integral

bearing or multiturn rotary encoders (with

gears) are used. The intensity may vary

depending on the mounting situation and

the speed.

Conditions for longer storage times

HEIDENHAIN recommends the following

in order to make storage times beyond

12 months possible:

• Leave the encoders in the original

packaging.

• The storage location should be dry, free

of dust, and temperature-regulated. It

should also not be subjected to

vibrations, mechanical shock or chemical

inﬂ uences.

• For encoders with integral bearing, every

12 months (e.g. as run-in period) the

shaft should be turned at low speeds,

without axial or radial loads, so that the

bearing lubricant redistributes itself

evenly again.

Expendable parts

Encoders from HEIDENHAIN are designed

for a long service life. Preventive mainte-

nance is not required. However, they con-

tain components that are subject to wear,

depending on the application and manipula-

tion. These include in particular cables with

frequent ﬂ exing.

Other such components are the bearings

of encoders with integral bearing, shaft

sealing rings on rotary and angle encoders,

and sealing lips on sealed linear encoders.

Insulation

The encoder housings are isolated against

internal circuits.

Rated surge voltage: 500 V

preferred value as per DIN EN 60 664-1

overvoltage category II,

contamination level 2 (no electrically

conductive contamination)

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