Sungrow SG2K5TL, User Manual

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SG2K5TL/SG3KTL/SG4KTL-31
User Manual
36
6.6
Communication Connection
6.6.1
Communication Types
Inverter may transfer the monitored information from inverter via its integrated RS485
interface to a PC with monitoring software (such as SolarInfo Insight), or to data
logging device (such as SolarInfo Logger).
z
Where there is only one inverter, a RS485 cable with RJ45 connector enables
connection between inverter and PC.
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Where there is more than one inverter, all inverters can be connected to PC in
daisy chain. The first inverter in the chain must be terminated with a resistor of
120 Ohm. And shielding layer of RS485 cable should be single-point grounded.
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A converter such as RS485-232 converter or SolarInfo Logger, which converts
485 to 232 signal, is needed between inverter and PC.
6.6.2
RS485 Communication Connection
RS485 is the standard communication choice for inverter.
The maximum number that inverters are connected in the daisy chain depends on
converter and other factors. Please refer to converter’s manual to obtain the limit.
RS485 terminals on the bottom of the inverter are RJ45 sockets. First prepare
communication cable and RJ45 plug. Meanwhile to guarantee inverter protection
degree, there are waterproof communication connectors supplied in the scope of
delivery.
RS485 cable’ requirements to ensure quality of communication:
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Shielding Ethernet cable
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Twist-pair type
1. Lead shielding Ethernet cable through cable gland and inner rings.
2. Use the Ethernet crimper to crimp the cables and connect cables to RJ45 plug
according to TIA/EIA 568B.