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Contact arrangement
Ex 23/EX 29 control switch
Switch mechanism
4
5
Special switch
mechanism
7
8
Fig. 2
Wall mounting bracket
Screw M6 x 16
Wall mounting
Lock washer
bracket
Fig. 3
Mounting the wall
mounting bracket
Mounting at right side
Mounting at bottom
Explosion protected control units made of plastic or
stainless steel type GHG 44.
The instructions for the installation of intrinsically
Circuitry
safe electrical apparatus are to be observed.
Code
It has to be ensured that the external
capacitance and inductance permitted for the
specific intrinsically safe circuit are not exceeded.
. 049
In the case of building up the electrical
equipment in the "protective insulation"
. 037
version, appropriate sticker
(
) GHG 905 1002 P0005 can be
requested by the manufacturer.
. 191
If the inserted terminal rail is not equipped
completely with line-up terminals, the terminal
rail must be included in the equipotential
earth connection also.
6.3
6.3
Cable entries (KLE);
Cable entries (KLE);
6.3
6.3
6.3
Cable entries (KLE);
Cable entries (KLE);
Cable entries (KLE);
blanking plugs
blanking plugs
blanking plugs
blanking plugs
blanking plugs
6
Generally, only certified cable entries and
blanking plugs may be used. Flexible
cables shall be used with trumpet-shaped
cable glands or other suitable entries with
9
additional pull-relief.
When using cable entries with a lower IP
protection than that which applies to the
device (see page 11), the IP protection of the
whole device will be reduced.
The mounting directives applicable to the
cable entries fitted shall be observed.
In order to establish the minimum protection
category, unused holes shall be closed with a
certified blanking plug.
Care has to be taken that when fitting the
cable entries, sealing inserts appropriate to
the cable diameter be used.
In case of sealing inserts that are cut out, it
will have to be ensured that the insert is
properly adapted to the cable diameter.
In order to ensure the required minimum
protection category, the cable entries will have
to be tightened down.
Overtightening might impair the protection
category.
Attention: When tightening the cap nut of
the type ADE metal cable entry, the
screwing is to be protected against
twisting by means of a suitable tool.
All vacant metric CEAG / Cooper Crouse-
Hinds cable entries shall be closed with the
certified blanking plug for metric cable entries.
6.4
Flange and metal plates
If flange plates have to be removed in case of
plastic terminal boxes (e.g. for drilling entry
holes), attention will have to be paid to the
proper fit of the flange plate and of the clamp
clip when mounting them in order to maintain
the minimum protection category.
Flange plates for stainless steel terminal boxes
shall be fitted so that the IP protection in
maintained. Pay attention to the proper seat of
the sealing element.
PE conductors fed from outside are to be
connected to the PE terminal provided on
the flange. The maximum cross-section is
50mm².
Attention: Metal flanges, metal plates and
metal cable glands shall be included in the
equipotential earth connection.
6.5
Closing the device /
Cover closure
When placing the enclosure cover care has
to be taken that the front actuator elements
exactly correspond to the built-in
components and that the cover pertaining
to the bottom part of the enclosure is used.
The switching handles of the Ex 23 and Ex 29
control switches shall have the same position
as they had when the apparatus was opened.
When putting on the cover care has to be
taken that the axis of the Ex 23 and Ex 29
control switches engages in the driving hole of
the switching handle.
Any foreign matter shall be removed from the
apparatus.
In order to ensure the required minimum
protection category, the cover screws are to
be tightened down.
Overtightening might impair the protection
category.
6.6
Taking into operation
Prior to taking the apparatus into operation,
the tests specified in the relevant national
regulations will have to be carried out. Apart
from that, the correct functioning and
installation of the apparatus in accordance
with these operating instructions and other
applicable regulations will have to be
checked.
Prior to taking into operation, the zero point
adjustment of the measuring instrument index
has to be checked. Where necessary, the
measuring instrument index is to be adjusted
to the zero point by means of the adjusting
screw.
Incorrect installation and use of the control
units can invalidate the guarantee.
Cooper Crouse-Hinds GmbH
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