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RS-485
The RS-485 digital interface (2 leads / half duplex) is characterised by a very high
tolerance to electromagnetic interference due to the symmetrical signal transmission.
This means that cable lengths of up to 900m can be used. The final device on a bus
must be equipped with a 120 ohm resistor, in order to avoid signal overlapping.
In order to avoid damage, only separate and connect the RS-485 cable if the
DULCO
®
turb C is switched off.
Assembly and Installation
23