Solare Datensysteme Solar-Log - Manual (Page 284)

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Vaillant
Vaillant – auroPOWER VPI /1 and VPI (RS485)
Connect the inverters to each other
•
Connect using a 2 wire, shielded data cable
•
Where to connect: Terminal strip inside the inverter
The RS485 connections on the terminal strip are each double connections so that the wiring can be con-
tinued to the next inverter.
Procedure
1. Open the inverter as shown in the inverter's instructions.
2. Connect terminal A on inverter 1 to terminal A on inverter 2.
3. Connect the other inverters to each other in the same way.
4. Terminate in the last inverter. In the inverter connect the free terminal A to terminal B using the
supplied 330 Ω terminating resistor.
Devices without a transformer: From unit generation VPI xx00 /2 the 330 Ω resistor is switched on
using the DIP switch. When the unit is delivered the terminal resistor is switched on.
5. Close inverters.
Allocate communication address
•
Recommendation: Continuous numbering starting with 1.
•
Setting:
Units without transformers: using the DIP switch inside the inverter
Units with transformers: using the inverter operating display.
•
Procedure: Start according to the inverter's instructions