RO
EN
29
ELECTRIC PUMP CONNECTION
Before making the electrical connection, the cables must be prepared with fork-type crimp terminals. The crimp terminals (fork-type) must
be crimped by specially trained personnel, using proper crimping tools.
After inserting the cable in the metal cable clamp, connect the motor cables to the terminal board marked with the letters U’,V’,W’ as
shown in the image below. Then proceed with connection of the earthing wire to the corresponding terminal.
The device is fitted with an output short circuit protection.
The recommended cable section is 2.5mm
2
for cable lengths from 2 to 30 metres. Longer
cables, though admissible, have not been tested according to the EMI/RFI standards and must
be evaluated by the manufacturer.
The type of wire must be selected according to the conditions of use (domestic, dry or wet,
indoor or outdoor installation).
Where an excessive cable length (over 30 metres) is used, it is recommended to insert a dV/dT
filter to limit peak current voltage and for motor, especially windings, longevity.
Also observe the installation limits as declared by the manufacturer of the electric pump
connected to
Nettuno
.
AUXILIARY INPUT AND OUTPUT CONNECTIONS
CAUTION: The remote connections are insulated from the network power by a “reinforced” type insulation (reinforced
insulation according to EN 60730-1). Therefore it is recommended to make electrical connections with a type of cable that
guarantees double or reinforced insulation, using insulated voltage-free contacts for the digital inputs.
Insert the cables of the auxiliary devices via the central cable clamps in
plastic. Use the relative cable guides to keep wiring tidy.
Nettuno has various auxiliary connections located on the I/O board. The following diagram identifies the various connections.
MOTOR OUTPUT
TERMINAL
BOARD
CABLE
GUIDE
CABLE CLAMPS FOR
AUXILIARY INPUTS
4÷20mA PRESSURE
SENSOR
0-10V ANALOGUE
INPUT
DIGITAL RELAY OUTPUTS
SERIAL PORT
RS 485
SERIAL PORT
RS 485
DIGITAL INPUTS
