Safety Instructions - Pepperl+Fuchs AVS78E Manual

Singleturn absolute encoder
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.
Advantage:
shield
relief
Disadvantage:

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!
Do not remachine the drive shaft!
Avoid impact!
Do not remachine the housing!
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group USA: +1 330 486 0001
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com
metalised connector,
clamped with the strain
clamp
soldering shield on
Germany: +49 621 776 1111
fa-info@de.pepperl-fuchs.com
Singapore: +65 6779 9091
fa-info@sg.pepperl-fuchs.com
AVS78E Mining
8