PVM58

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Germany: +49 621 776 1111

Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: +1 330 486 0001

Singapore: +65 6779 9091

www.pepperl-fuchs.com

fa-info@us.pepperl-fuchs.com

fa-info@sg.pepperl-fuchs.com

fa-info@de.pepperl-fuchs.com

Multiturn absolute encoder

The use of highly sophisticated microelectronics requires a consistently implemented anti-interference and wiring concept. This

becomes all the more important the more compact the constructions are and the higher the demands are on the performance of

modern machines.

The following installation instructions and proposals apply for "normal industrial environments". There is no ideal solution for all

interfering environments.

When the following measures are applied, the encoder should be in perfect working order:

• Termination of the serial line with a 120  resistor (between Receive/Transmit and Receive/Transmit) at the beginning and

end of the serial line (e. g. the control and the last encoder).

• The wiring of the encoder should be laid at a large distance to energy lines which could cause interferences.

• Cable cross-section of the screen at least 4 mm².

• Cable cross-section at least 0,14 mm².

• The wiring of the screen and 0 V should be arranged radially, if and when possible.

• Do not kink or jam the cables.

• Adhere to the minimum bending radius as given in the data sheet and avoid tensile as well as shearing load.

Operating instructions

Every encoder manufactured by Pepperl+Fuchs leaves the factory in a perfect condition. In order to ensure this quality as well as

a faultless operation, the following specifications have to be taken into consideration:

• Avoid any impact on the housing and in particular on the encoder shaft as well as the axial and radial overload of the encoder

shaft.

• The accuracy and service life of the encoder is guaranteed only, if a suitable coupling is used.

• The operating voltage for the encoder and the follow-up device (e. g. control) has to be switched on and off simultaneously.

• Any wiring work has to be carried out with the system in a dead condition.

• The maximum operating voltages must not be exceeded. The devices have to be operated at extra-low safety voltage.

Notes on connecting the electric screening

The immunity to interference of a plant depends on the correct screening. In this field installation faults occur frequently. Often

the screen is applied to one side only, and is then soldered to the earthing terminal with a wire, which is a valid procedure in LF

engineering. However, in case of EMC the rules of HF engineering apply.

One basic goal in HF engineering is to pass the HF energy to earth at an impedance as low as possible as otherwise energy would

discharge into the cable. A low impedance is achieved by a large-surface connection to metal surfaces.

The following instructions have to be observed:

• Apply the screen on both sides to a "common earth" in a large surface, if there is no risk of equipotential currents.

• The screen has to be passed behind the insulation and has to be clamped on a large surface below the tension relief.

• In case of cable connections to screw-type terminals, the tension relief has to be connected to an earthed surface.

• If plugs are used, metallised plugs only should be fitted (such as sub D plugs with metallised housing). Please observe the

direct connection of the tension relief to the housing.

Safety instructions

Please observe the national safety and accident prevention regulations as well as the subsequent safety

instructions in these operating instructions when working on encoders.

If failures cannot be remedied, the device has to be shut down and has to be secured against accidental operation.

Repairs may be carried out only by the manufacturer. Entry into and modifications of the device are not

permissible.

Tighten the clamping ring only, if a shaft has been fitted in the area of the clamping ring (hollow shaft encoders).

Tighten all screws and plug connectors prior to operating the encoder.

Do not stand on the encoder!

Advantage:

metalised connector,

shield

clamped with the strain

relief

clamp

Disadvantage:

soldering shield on