8
GP43/44
Datum 10.08.2011
Art.Nr. 79804
Änd. Stand 243/11
Fig. 1: Fixation of ferrules
adhesive tape
5. Installation
For mounting, the degree of protection specified
must be observed. If necessary, protect the unit
against environmental influences such as sprayed
water, dust, knocks, extreme temperatures.
Mounting of the encoder
•
Use the frontal bores to fix the encoder. Mount
encoder without force.
•
Forces must not be transmitted via the housing,
but only via the shaft.
•
Do not exceed the values for the maximum axial
and radial shaft load.
•
Ensure accurate shaft alignment. If shaft and
flange are not correctly aligned, strain on the
bearings will result, which will overheat and be
irreparably damaged.
6. Electrical connection
•
Switch power off before any plug is inserted or
removed!
•
Wiring must only be carried out with power off.
•
Provide standed wires with ferrules.
•
Check all lines and connections before switching
on the equipment.
Interference and distortion
All connections are protected against the effects of
interference.
The location should be selected to
ensure that no capacitive or inductive interfe-
rences can affect the encoder or the connection
lines!
Suitable wiring layout and choice of cable
can minimise the effects of interference (e. g. in-
terference caused by SMPS, motors, cyclic controls
and contactors).
Necessary measures:
•
Only screened cable should be used. Screen should
be connected to earth at both ends. Wire cross
section is to be at least 0,14 mm², max. 0,5 mm².
•
Wiring to screen and to ground (0 V) must be via
a good earth point having a large surface area for
minimum impedance.
•
The unit should be positioned well away from
cables with interference; if necessary
a protective
screen or metal housing must be provided.
The
running of wiring parallel to the mains supply
should be avoided.
•
Contactor coils must be linked with spark sup-
pression.
Supply voltage of the instrument transformer
Operating voltage depends on execution and is
indicated in the delivery documentation or on the
identification plate.
20 ... 28 VDC
6.1 How to open and close the device
For opening:
•
To open the unit, remove fastening screws on the
GP44's cap (on GP43's back wall).
•
Ensure that the sealing is not damaged or lost.
For closing:
To easily close the unit and to avoid cable damage,
we recommend securing the inner strands with an
adhesive tape. The adhesive tape should be insensi-
tive to temperature and ageing (only GP44):
•
Ensure that the sealing lies correctly in the groove.
•
Put the cap/back wall onto the flange. Do not
damage the sealing.
•
Tighten the fastening screws.
6.2 Cable connection
•
Prepare wire accord. to fig. 2
•
Open the device (see chapter 6.1) and unscrew
the PG-screws.