Burkert Type 8643 - Handbuch (Seite 7)

24
insTAllATion 8.
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 of the
Power I/O Box Type 8643!
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
circuits 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 tem-
perature 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 / 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)
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Warning!
Risk of injury from improper installation!
Installation may be carried out by authorized techni- •
cians 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!
Risk of injury from unintentional activation of the
system and an uncontrolled restart!
Secure system from unintentional activation. •
Following assembly, ensure a controlled restart. •
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note!
Electrostatic sensitive components / modules.
The Power I/O Box Type 8643 contains electronic com-
ponents which respond sensitively to electrostatic dis-
charge (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!
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).
english
Type 8643 PA