KROHNE OPTISONIC 7060 EN - Manual (Page 31)

OPTISONIC 7060
Electrical & mechanical installation manual 730962.31.00 page 31 of 52
Terminal assignment
Assign the terminals in the CONVERTER terminal box (see Fig. 3.7) in the same way as for the
OPTISONIC 7060 in non-hazardous areas (see table in Section 3.4.5).
Important
The protective conductor must not be connected within the hazardous area. For
measurement reasons, the equipotential bonding must, as far as possible, be identical to
the pipeline potential. Additional grounding with the protective conductor PE via the
terminals is not permitted!
Notes for safe operation in hazardous areas
• Protection against explosion: II 2G EEx de ib [ia] IIC T4 or II 2G EEx de ib [ia] IIA T4
• Ambient temperature: -20°C to +60°C
In the extended temperature range from -40 C to +60 C, only use metal cable glands.
• The cable glands delivered are black. If connections are wired with intrinsically safe
circuits, it is recommended to replace these with the light-blue cable connections (RAL
5015) provided.
• For the temperature class according to the ambient and media temperature, see the EC
Type Examination Certificate.
• The type of protection for the field and power supply connections is determined by the
external circuits that are connected (for options see "Connection variants").
• Safety-relevant data for intrinsically safe circuits is provided in the EC Type Examination
Certificate.
• Ensure that the power supply connection cover is properly sealed. In intrinsically safe
installations, the terminal box can be opened and cables connected and disconnected
while the system is live.
• If the meter body is insulated, the CONVERTER housing must not be insulated.
Important
Always observe the temperature specifications for use in hazardous areas.
Approval of the
ultrasonic transducers
in zone 0 only valid for
operation under
atmospheric conditions.
IMPORTANT
IMPORTANT