Burkert Type 8643 - Handbuch (Seite 7)

24
8. insTallaTion
safety instructions 8.1.
Danger!
Hazardous if used in explosion-risk area. Risk of
explosion from electrical voltage!
The Power I/O Box Type 8643 is designed as ignition
protection type Ex-e (increased safety).
Before working on non-intrinsically safe circuits of •
the Power I/O Box Type 8643, always switch off the
operating voltage of the system!
Danger of explosion due to internal charging!
When the power supply to the Power I/O Box Type 8643
is switched off, the internally stored charge will not
be completely dissipated for 4 minutes. To prevent an
explosion, switch off the power supply before connecting
or disconnecting Ex-e terminals.
Do not remove the cover from the connection terminals •
for Ex-e switching circuits until the connected Ex-e cir-
cuits have been disconnected from the power supply
for longer than 4 minutes.
If using the 2-wire version in potentially explosive
•
areas, do not connect any cable to the Power 24 V
supply terminals!
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Danger of explosion if the allowable ambient tempe-
rature ranges are exceeded!
Observe the respective ambient temperature range •
which is based on the type designation
(e.g. 8643-2-AL-KS-F-I/O), according to the table in
the EC-Type Examination Certificate (see Appendix of
Operating Instructions / Type Examination Certificate).
Danger of explosion due to unauthorized combi-
nation of the ignition protection types!
Due to unauthorized combination of the ignition pro-
tection types, the device is not suitable for use in the
explosion-protected area. If the device is nevertheless
used in this area, there is a danger of explosion!
If the bus supply of the 4-wire version of the device •
was operated once in ignition protection type of
increased safety (e), the bus supply may no longer be
intrinsically safe in the ignition protection type (i).
Warning!
Risk of injury from improper installation!
Installation may be carried out by authorized technici- •
ans only and with the appropriate tools!
Observe the national regulations which apply to the
•
installation/operation of electrical equipment in areas
where there is a risk of explosions!
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Warning!
Risk of injury from unintentional activation of the
system and an uncontrolled restart!
Secure system from unintentional activation. •
Following assembly, ensure a controlled restart. •
note!
Electrostatic sensitive components / modules.
The Power I/O Box Type 8643 contains electronic
components which respond sensitively to electrostatic
discharge (ESD).
Contact with electrostatically charged persons or objects
is hazardous to these components. In the worst case
scenario, they will be destroyed immediately or will fail
after start-up.
Observe the requirements in accordance with •
EN 100 015 – 1 to minimize or avoid the possibility of
damage caused by sudden electrostatic discharge!
Do not touch the electronic components while the
•
power supply voltage is on!
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note!
Function restriction
The function of the device may be restricted without
potential equalisation.
Connect the earth terminal point on the housing to the
potential equalisation (PA).
installation instructions 8.2.
note!
The allowable technical data must not be exceeded. •
Preferred installation position: Cable glands face •
downwards!
The cable glands on the housing have a metric thread.
•
Use only shielded lines to supply the bus! •
Place the bus line shields on the designated screw •
terminals as short as possible!
When the work is complete, carefully close the
•
housing again!
This device complies with EMC Directive of the
Council of the European Union No. 2004/108/EG.
Follow the installation instructions to satisfy the
conditions of this directive.
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Type 8643