Information For Safe Operation In Potentially Explosive Atmospheres - Atex / Iecex; Inspection; Output Circuits - ABB CoriolisMaster serie Inbetriebnahmeanleitung

6.4 Information for safe operation in potentially explosive
atmospheres – ATEX / IECEx
6.4.1

Inspection

DANGER – Risk of explosion!
Risk of explosion when opening the housing.
Before opening the housing:
— Check that a valid fire permit is available
— Check that there is no risk of explosion
— Switch off the power supply
CAUTION – Risk of burns!
Risk of burns on the flowmeter sensor posed by
hot media for measurement. The surface
temperature may exceed 70 °C (158 °F),
depending on the temperature of the medium.
Before starting work on the flowmeter sensor,
make sure that the device has cooled sufficiently.
Flowmeter sensors must be commissioned and operated
according to ElexV (German ordinance on electrical
installations in potentially explosive atmospheres),
EN 60079-14 (setting up electrical installations in potentially
explosive atmospheres), and relevant national standards.
In potentially explosive atmospheres, installation,
commissioning, maintenance, and servicing must only be
performed by properly trained personnel.
The commissioning activities described here are performed
after the flowmeter has been installed and the electrical
connection has been made.
The supply power must be switched off.
When operating the flowmeter in areas containing
combustible dusts, comply with EN 61241-0:2006.
28 - EN CI/FCB300-X1 | CoriolisMaster FCB330, FCB350
6.4.2

Output circuits

Installation of intrinsically safe "i" or increased safety "e"
The output circuits are designed so that they can be
connected to both intrinsically safe and non-intrinsically safe
circuits.
It is not permitted to combine intrinsically safe and non-
intrinsically safe circuits.
On intrinsically safe circuits, equipotential bonding must be in
place along the entire length of the cable used for the current
outputs.
The rated voltage of the non-intrinsically safe circuits is
Um = 60 V.
IMPORTANT (NOTE)
The cable glands are supplied in black by default.
If the signal outputs are wired to intrinsically safe
circuits, we recommend that you use the light
blue cap supplied, which you will find in the
connection area, for the corresponding cable
entry.
IMPORTANT (NOTE)
The safety specifications for intrinsically safe
circuits can be found on the EC type-examination
certificate.
— Make sure that the cover over the voltage supply
connection is tightly closed. With intrinsically safe output
circuits, the terminal box can be opened.
— It is recommended that you use the cable glands supplied
(not for the -40 °C [-40 °F] version) for the output circuits as
appropriate for the relevant type of protection: intrinsically
safe: blue, non-intrinsically safe: black
— The sensor and the transmitter housing must be connected
via the equipotential bonding. For intrinsically safe current
outputs, equipotential bonding needs to be in place all the
way along the circuits.
— If the sensor is insulated, the maximum insulation thickness
is 100 mm (4"). The transmitter housing must not be
insulated.
— After switching off the power supply, wait t > 2 minutes
before opening the transmitter housing.
— When commissioning the flowmeter, refer to
EN 61241-1:2004 regarding use in areas containing
combustible dust.
— The operator must ensure that, when connecting the
protective conductor (PE), no potential differences exist
between the protective conductor and the equipotential
bonding (PA), even in the event of a fault.