Communication Via Rs-485 - Ingeteam INGECON SUN 40TL U M480 Manual De Instalacion Y Uso

Ingeteam

7.2. Communication via RS-485

To communicate several inverters via RS-485, create a communication bus. In each inverter, make the connection
as shown in the following figure. You must install a ferrite rod (supplied by Ingeteam) and going round the
communications wiring two times.
The standard recommends installing 120 Ohm end of line resistors at the two ends of the RS-485 wiring. In order
to activate the end-of-line in the final inverter of the communication bus, switch the three switches indicated in
the figure to ON.
In the communications bus, only the end-of-line resistor of the final inverter of the communication
bus should be active (the three switches in ON). For the remaining inverters, the resistance must be
deactivated (the three activators for each of the switches must be in OFF).
If communication is via RS-485 with a single inverter, the end-of-line resistor must be enabled.
After making the wiring connections, it will leave the unit via a coupling installed in the precut hole for the
accessories.
To ensure the unit's level of protection, follow the permitted diameter range indicated in section "2.10. Description
of cable inlets".
28
1 2 3
O n
O ff
Pin Signal
1 RS-485 B(+)
2 RS-485 A(–)
3 Protection shield*
4 GND
* Terminal to facilitate the connection.
Connection of accessories
ABO2012IQM01_ - Installation and Operation Manual