8.2. The FullClean Plus Circuit Board
Figure 2 The FullClean Plus Main PCB with its Main Components
The following components are located on the FullClean Plus PCB:
8.2.1. Connectors
8.2.1.1. (X1A t/m X1D) I1...I4
Four 2-terminal digital 12-24 V AC/DC inputs, used to connect digital inputs such as water
level detectors and the delivery line switch. These inputs are read through an optocoupler,
which means that these inputs are electrically isolated from the PCB.
8.2.1.2. (X2) 4-20 mA
3-terminal connector, not used.
8.2.1.3. (X3) PT 100
4-terminal analogue input for two PT100 temperature sensors. Temperature sensor 1 is
connected between the terminals 1 and 3 and the second PT100 sensor is connected between
the terminals 2 and 3. Terminal 4 can be used for connecting the shield of the cable.
8.2.1.4. (X4 a/b)
Two 3-terminal connectors, not used.
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