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ELECTRICAL CONNECTION AND GROUNDING INSTRUCTIONS
Always ensure that the converter and the sensor are grounded (earthed) correctly. The grounding of the sensor
and converter
must
ensure that the instrument and liquid are equipotential.
Before connecting the power supply, verify that the mains voltage is within the limits indicated on data plate.
For the connections use only approved conductors, with fire-proof properties, whose section varies from 0.25 mm
2
to
1.50 mm
2
, based on distance/power; additionally fix the power supply wires with a additional fastening system located
close to the terminal.
The power supply line must be equipped with an external protection for overload current (fuse or automatic line
breaker).
Provide in close proximity the converter a magnetotermic circuit breaker easily accessible for the operator and clearly
identified; whose symbols must conform to the electrical safety and local electrical requirements.
Ensure that the component complies with the requirements of the standard for electrical safety distance.
Check chemical compatibility of materials used in the connection security systems in order to minimize
electrochemical corrosion. In the aluminum housing it should avoid direct contact between the ground connection
cable and the aluminum housing. It is therefore recommended to connect the safety ground cable, by placing it
between the washer and the metal bracket on the related terminal or use an eyelet terminal crimped on the ground
protection cable.
The sensor, hardwired inputs and outputs are connected to the converter through terminal blocks located inside the
converter.
To locate the terminal block loosen the 4 screws on the terminal block cover. When the front cover is lifted, the
terminal block is visible. The terminal block is the hardwire connection of the converter to external equipment,
including the sensor.
The mains power cables must have adequate values for the maximum current of the appliance, and the cable used
must house the standards of the IEC 60227 standard or the IEC 60245 standard.
The following pages give informations on the terminal block numbering, and the respective connecting of the sensor
cables, and inputs/outputs.
N(-)
L(+)
ORING 4700
COVER
SCREW
GROWER
