6 Electrical Connection User Manual
46
6.6.2 Communication System
For Single Inverter
Where there is only one inverter, a RS485 cable enables connection between
inverter and data logging device.
Inverter
Communication Connection
(RS 485 A/B bus or RJ 45)
Terminating
Resistor
RS 485 A/B bus RJ 45
Single one
Only out.
Only out.
Yes
For Multiple Inverters
Where there is more than one inverter, all inverters can be connected to data
logging device in daisy chain. The first and last inverters in the chain must be
terminated with a resistor of 120Ω. The shielding layer of RS485 cable should be
single-point grounded.
The maximum number that inverters are connected in the daisy chain depends on
converter, data logging device and other factors. Please refer to converter’s or data
logging device’s manual to obtain the limit.
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