Sungrow SG1K5TL, Руководство пользователя

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Electrical Connection
5
37
5.8.2
Connecting RS485 Cable
RS485 is communication standard for bidirectional transmission of data between one
or more inverters and a PC or a data logger.
If there is more than one inverter to communicate with a PC or a data logger, it is
crucial to configure communication parameters of each inverter. See “8.10.8 Set
Communication Parameters”.
RS485 bus’ requirements to ensure quality of communication:
z
Shielding twist-pair type
z
Shielding layer of RS485 bus should be single-point grounding
SunInfo
TM
logger and RS485-232 converter are optional devices and can be ordered
from Sungrow.
z
Data logger
Wiring procedure:
Step 1: A resistance with 120
Ω
is connected at the initiating terminal of RS485 bus.
Step 2: Plug the connector of RS485 cable into corresponding RS485 terminal of Inverter 1.
Step 3: The two wires of the other end of RS485 cable, marked A and B, are connected to
corresponding lines of RS485 bus, as the above diagram.
Step 4: Connect other inverters to RS485 bus in the same way.
Step 5: Connect the end of RS485 bus to A1 port and B1 port of SunInfo
TM
logger.
z
Data PC