Sungrow SG125HV-30, User Manual

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User Manual 5 Electrical Connection
51
A converter such as data collector is needed to convert signal between
inverter and PC.
5.5.2 RS485 Communication System
SG125HV-30
EMS200
DC bus
DC bus
DC bus
DC bus
CAN
communication
Carrier
synchronization
485
Fig. 5-11 System communication diagram
For Multiple Inverters
Where there is more than one inverter, all inverters can be connected in a daisy
chain through an RS485 communication cable. The shielding layer of the RS485
cable should be single-point grounded.

The length of an RS485 communication cable should be less than
1200m.

If several inverters communicate with each other and connect to
the Logger, at most 4 daisy chains are supported and 60 devices
in total can be connected (i.e. 4 daisy chains can be connected
with at most 15 devices connected to one chain or 3 daisy chains
are connected with at most 20 devices connected to one chain).