Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 7
MPU
Series
C
I/O/M
Manual
General
1.2.1.
Hints for Installation in Hazardous Area
All the components marked with the sign of
are explosion-proof electrical equipment
and safety-tested and certified. See section 3.8 for electrical installation.
Caution:
Any interference, mechanical or electrical, is not permitted.
EX-protection regulations must be observed!
In case of a malfunction of the electronic board fitted in the flameproof housing only the
complete board has to be replaced. Test and repair of the board is only possible in the
factory. The installation and replacement of the board is the task of skilled personnel.
General hints:
• The electrical installation has to be compliant with EN 60079-14 and the ordinary
electric installation rules.
• To prevent ignition of hazardous atmospheres and to prevent electrical shock,
disconnect from supply circuits before opening. Protect the device against
unintended power on. Before bringing the device into operation make sure that it
is tightly closed.
• The flameproof housing contains one or more of the following threaded entries:
½” NPT. All cable entries, stopping boxes or plugs shall be certified according to
the requirements in EN / IEC 60079-1.
• The flameproof housing contains an internal battery-powered circuit. Do not open
the housing unless an area is known to be non-hazardous. To reduce the risk of
ignition of hazardous atmospheres, conduit runs must have a sealing fitting
connected within 45 cm of the enclosure.
• Before the first power up after installation check that the connected voltage is
conform to power rating on the name plate. Not used cable entries have to be closed
with certified plugs.
• The wiring has to be made according to the wiring diagrams which are part of this
manual.
• Modification of the internal construction of the flameproof and adding additional
parts to the electronic are not allowed
• Special precaution must be made when bringing the supplied Laptop / PC into
hazardous area. Provide for work permit before bringing the Laptop / PC into
restricted area, according the site regulations. A gas detector must be in operation
continuously while the Laptop / PC is present in the restricted area. This applies
also while it is switched off.
1.2.2.
Danger from High Pressure and Explosive Gas
The MPU is directly integrated into gas-carrying pipelines. The operating company shall
be responsible for safe operation and for complying with additional national regulations.
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