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Sensor connectivity
Before connecting any sensor to the panel, the main power supply must be disconnected. There are two ways of
connect the sensors depending on the number of contacts.
Α) Sensor with 2 contacts 4÷20mA
The connection of sensors with 2 contacts 4÷20mA must be between «+» and «-» of the sensor connector, that
correspond to «+» and “S” of the panel as shown in figure 4.
The cross-section of the cable depends on the length (see next table). On all sensors with 2 contacts you must
connect a coaxial cable. The shielding of the cable must be connected to the «-» of sensor.
Sensors with two contacts
Ranges
Cable type
From 0 to 100 meters
2 x 0,5 mm² shielded
From 100 to 200 meters
2 x 1 mm² shielded
Frοm 200 to 500 meters
2 x 1,5 mm² shielded
Frοm 500 to 1000 meters
2 x 2,5 mm² shielded
Β) Sensors with 3 contacts 4÷20mA
+
-
S
Figure
4
: Connection diagram with two contact sensors
Figure 3: Power
cable
