Pump Groups For Circulation; Twin Group Connections; Sensor And I/O Connections - Pressurisation; Ratiometric Pressure Sensor - Dab Ngdrive Installations- Und Wartungsanleitungen

Type of contact
Max. bearable voltage
Max. bearable current
Min. accepted cable section
Max. accepted cable section

Pump groups for circulation

Pump groups are divided into:
twin groups
•
multi-pump groups
•
A twin group is a pump group consisting of a single pump body on which two motors are mounted.
A multi-pump group is a group consisting of several identical pump, motor and inverter elements. Each element shares both suction
and delivery. Each pump must have a non-return valve before flowing into the delivery manifold.

Twin Group Connections

In twin groups the pressure sensor must be connected to the inverter on the left (looking at the group from the side of the motor fan
so that the fluid flow goes from bottom to top).
For correct operation of the twin system, all the external connections of the input terminal board must be connected in parallel
between the inverters, respecting the numbering of the individual terminals.
5.3.5

Sensor and I/O connections - Pressurisation

The following can be used as control sensors: ratiometric pressure sensor, 4-20 mA current pressure sensor, pulse flow sensor. Floats,
auxiliary pressure enabling signal, general inverter enabling control and suction pressure switch can be connected to the digital inputs.
For the general diagram, see figure 8, 9, 10.

Ratiometric pressure sensor

For the type of sensor to be used, refer to those listed by the control panel if present or by the Dconnect APP. The method of use will
depend on the settings made on the control panel if present or by the Dconnect APP.
The inverter accepts the ratiometric pressure sensor 0 - 5V.
The cable must be connected at one end to the sensor and at the other to the pressure sensor input provided on the inverter, see
Figure 9.
The cable has two different ends with obligatory direction of connection: connector for industrial applications (DIN 43650) on the
sensor side and 4-pole connector on the inverter side.
Multi-inverter connection - ratiometric pressure sensor
In multi-inverter systems, the ratiometric pressure sensor (0-5V) can be connected to any inverter in the chain.
The use of ratiometric pressure sensors (0-5V) is strongly recommended for ease of wiring. By using ratiometric
pressure sensors, no wiring is required to transfer the pressure reading information between the various inverters. Data
communication between inverters takes place via wireless, however, it is suggested to fit the communication cable to
strengthen the system in case of failure in order to be able to read the sensors even if connected to a faulty or switched-
off inverter.

Current pressure sensor

For the type of sensor to be used, refer to those listed by the control panel if present or by the Dconnect APP. The method of use will
depend on the settings made on the control panel if present or by the Dconnect APP.
The inverter accepts the current pressure sensor 4 - 20 mA.
The selected 4-20mA current sensor has 2 wires, one brown (IN+) to be connected to the terminal (+12), one green (OUT-) to be
connected to the terminal (Vi1). A jumper must also be inserted between terminal C1-2 and GND. The connections can be seen in
Figure 10.
Make sure that at least one pressure sensor is connected in the suction pipe.
Multi-inverter connection - current pressure sensor
Multi-inverter systems can be created with only one 4-20mA current pressure sensor, but it is necessary to wire the sensor to all the
inverters.
Attention: screened cable must be used to connect the sensors.
ENGLISH
Characteristics of the output contacts
Table 1: Characteristics of the output contacts
62
NO, NC, COM
250V
5A If resistive load
2.5A If inductive load
AWG 22 (0.3255mm )
2
AWG 12 (3.31mm )
2