Liquid Controls HML210 IOM - LCMag - Manual (Page 7)

HML 210
7
L
(+)
N
(-)
L N
(+) (-)
M3
M3
ELECTRICAL CONNECTIONS
GROUNDING INSTRUCTIONS
CONVERTER POWER SUPPLY
Compact/separate version Panel version
ALWAYS ensure that the converter and the sensor are grounded (earthed) correctly. The
grounding of the sensor and converter ensures that the equipment 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 0.25mm
2 to 2.50mm 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 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.
‰ The sensor, hardwired inputs and outputs are connected to the converter through a
terminal blocks located inside the converter.
‰ To locate the compact/separate version terminal block loosen the 4 screws on the
back 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 following pages give informations on the terminal block numbering, and the
respective connecting of the sensor cables, and inputs/outputs.