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The current supply to the inverter can normally be calculated (taking a safety margin into account) as 1/8 of the
current absorbed by the pump.
Although the inverter is already equipped with internal safety devices, the installation of a suitably sized thermal
magnetic circuit breaker is recommended.
If the entire power range available is used, for specific information on the current to be used when choosing cables
and the thermal magnetic circuit breaker, refer to Table 4.
2.3.3
Connection of user inputs
In inverters type M/T and T/T, the inputs can be switched on using either direct current or alternating current at 50-60
Hz. In type M/M the input can be activated only with a clean contact inserted between the two pins.
The wiring diagram and the electrical characteristics of the inputs are shown below.
Type of
inverter
M/T
T/T
M/M
ENGLISH
Wiring diagram of user inputs
Name of
Pin
connector
1
2
3
J6
4
5
6
7
1
2
3
J7
4
5
6
7
1
J2
2
Table 5: Input connection
59
Use
Power supply terminal: + 12V DC – 50 mA
Connection terminal input I3
Connection terminal input I2
Common connection terminal I3 – I2
Connection terminal input I1
Common connection terminal I1
Connection terminal: GND
Power supply terminal: + 12V DC – 50 mA
Connection terminal input I3
Connection terminal input I2
Common connection terminal I3 – I2
Connection terminal input I1
Common connection terminal I1
Connection terminal: GND
Connection terminal input I1
Connection terminal: GND
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