DAB AD 1.0 AC, Instruction For Installation And Maintenance

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or air bubbles that may impair operation. If the size of the pipeline enables transit of foreign bodies, a special filter may need to be
installed.
2.2.3 Connection of sensors
The ends for connecting the sensors are in the centre and are accessible by removing the screw of the connections cover, see Figure
3. The sensors must be connected to the relative inputs marked "Press" and "Flow"; see Figure 7.
Figure 9: Sensor connections
2.2.3.1 Connecting the pressure sensor
The inverter accepts two types of pressure sensor:
1. Ratiometric 0 – 5V (Voltage sensor to be connected to connector press1)
2. In current 4 - 20 mA (Current sensor to be connected to connector J5)
The pressure sensor is supplied with its own cable, and the cable and connection on the board varies according to the type of sensor
used. Both types of sensor can be supplied
2.2.3.1.1 Connecting a ratiometric sensor
One end of the cable must be connected to the sensor and the other end to the relative inverter pressure sensor input, marked "Press
1"; see Figure 7.
The cable has two different terminals with compulsory direction of insertion: connector for industrial applications (DIN 43650) on the
sensor side and 4-pole connector on the inverter side.
On multiple 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 to facilitate wiring. When using ratiometric
pressure sensors, there is no need for wiring to transfer pressure information readings between the various inverters.
The interconnection link cable deals with this operation
.
On systems with multiple pressure sensors, only ratiometric pressure sensors (0-5V) can be used (0-5V).
2.2.3.1.2 Connecting a 4 - 20 mA current sensor
Single inverter connection:
The selected 4-20mA current sensor has 2 wires, one brown (IN +) to connect to terminal 11 of J5 (V+), and one green (OUT -) to
connect to terminal 7 of J5 (A1C+). A jumper should also be wired in between terminal 9 and 10 of J5. The connections are shown in
Figure 8 and summarised in Table 5.