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5 Planning the installation
Planning the device communication and plant monitoring
Installation and operation manual M70A_260 Flex RPI703M26000 EU V1.1 EN 2022-08-02
5.7.10 Connecting a PC
A PC can be connected to the inverter via RS485.
You can use the PC to commission the inverter and change the
settings. This requires the following accessories.
Accessories
Description
Standard USB/RS485 adapter
For connecting the PC to the
inverter.
Delta Service Software (DSS)
For changing the inverter
settings.
To select a suitable USB/RS485 adapter, please contact Delta
Customer Service.
You can download the DSS at https://solarsolutions.delta-emea.
com.
Cable requirements
Bell wire. Both ends open.
5.8
Grid and system protection
1. The German standard VDE-AR-N 4105 requires external
grid and system protection with a coupling switch for PV
systems larger than 30 kVA.
2. Alternatively, VDE-AR-N 4105 allows the use of an inverter
with an internal coupling switch when this switch discon-
nects the inverter from the grid in less than 100 ms.
This inverter meets the requirement in (2). External grid and sys-
tem protection is not required.
