Cascade Mode Connection - Calpeda I-MAT Serie Instrucciones De Uso

Transducer general characteristics Values
Nominal supply voltage
N° of wires
Output signal (current)
Output signal (voltage)
Minimum drivable load resistance
For the electrical connection of the main pressure
transducer refer to paragraph 20.3 Fig.9 and Fig.10.
For the electrical connection of the secondary
pressure transducer refer to paragraph 20.3 Fig.11
e Fig.12.
6.9. Float switch connection
It is possible to connect up to 2 float switches, for
the electrical connection refer to paragraph 20.3
Fig.14
To program the float switches, refer to section
10.1 (Dry-run protection). In the picture is shown a
connection example (NC).
6.10. Connection of the input for max/min curve
operation
It's possible to connect a switch to enable operation
at Max/Min curve.
For the electrical connection refer to paragraph
20.3 Fig.15.
For programming refer to section 10.2 (enabling
Max/Min curve operation).
6.11. Connection of the input for second set-
point operation
It is possible to connect a switch to enable operation
with 2nd set-point.
For the electrical connection refer to paragraph
20.3 Fig.16.
For programming refer to section 10.3 (Enabling
2nd set-point operation).
6.12. Remote On/Off control connection
It is possible to connect a switch for remote on/off
control.
For the electrical connection refer to paragraph
20.3 Fig.17.
For programming refer to section 10.4 (Enabling
remote On/Off control).
6.13. Remote alarm connection
It is possible to connect up to 2 alarm signals either in
Volt free configuration, or with external supply voltage
configuration (+24VDC maximum current 4A).
For the electrical connection with volt free
configuration refer to paragraph 20.3 Fig.18.
For the electrical connection with external supply
configuration refer to paragraph 20.3 Fig.19.
To program the alarms refer to section 10.5 (Alarm
signals programming).
6.14. Connection of the output for remote
parameter monitoring
It is possible to use the analogic output for remote
monitoring of the frequency converter's parameters.
I-MAT_Ed5 - Operating Instructions
For the electrical connection refer to paragraph
20.3 Fig.13.
For programming see section 10.6 (Programming
24 VDC
of remote parameter monitoring).
2 or 3 wires

7. Cascade mode connection

0/4 ÷ 20mA
OFF
0-10V
500 Ohm Frequency converters are prearranged for use in
pressure boosting sets with a number from 2 to 6
pumps in the following versions:
Pressure boosting sets with 2-6 variable speed
pumps.
Pressure boosting sets with 1 variable speed pump
and up to 5 fixed speed pumps.
7.1. Cascade mode installation
Connect the frequency converters to the motors,
the installation must comply with the provisions
under section 6.6.
Connect
temperature or flow rate) to the delivery manifold of
the pressure boosting set.
7.2. Cascade mode electrical connection
Connect the supply cables to the motors and to
the power supply following the instructions under
paragraph 6.5. The power supply must comply the
provisions of section 3.
7.3. Cascade mode expansion board installation
The cascade mode expansion board must be
installed perpendicularly to the control board,
checking
connected, and that the board fits into the slides
(see paragraph 20.4)
7.4. Cascade
variable speed pumps
By means a proper cable make the connection
of the clamps E4-E5-E6 of the first frequency
converter to the clamps E8-E9-E10 of the next
frequency converter (see paragraph 20.5)
the transducer
It is advised to install the pressure
transducers on the same point of the delivery
manifold and complete the installation with a
pressure gauge.
The connection with the power supply must
be made with installation of a tripolar circuit
breaker (one for each frequency converter)
with proper size and with a B-type differential
switch (see section 6.5).
that the connectors
Make sure that the cascade expansion
board is properly connected, otherwise it's
not possible to use the cascade mode.
mode connection
Check the correct connection sequence
and check that terminals of each cable are
connected to the right clamp.
To comply with
electromagnetic compatibility,
cable length greater than 1 meter, it is
recommended the use of a shielded cable
with protection sheath connected on the
ground on each frequency converter.
(either pressure,
are properly
with 2-6
the standards of
for
Page 29 / 144
EN