PVI 3000/4000/5000/5300
Installation
and Operation Manual
25
N
PV+
PV-
L2
L1
Fig 2.3.11 PV- String connections and AC connections
2.4 Connection of Communication wiring
The PVI 3000-5300 inverter supports two common data interface standards, RS-232 and RS-485 that will be used to
communicate to the remote computer or communication gateway. Only one of the communication interfaces can work at a
time.
As shown in the Figure 2.4.4, there are two RJ-45 connectors, RJ45-R and RJ45-L that are located on the bottom of the
wiring box. The pin numbers of the RJ-45 connectors and the corresponding signals are described in the Figure 2.4.2 below.
If the RS485 is used as the external communication interface and the inverter is the last device in the RS485 loop, then the
termination switch shall be put to ON position (shown in the figure 2.4.3). The installer needs to open the front cover of the
wiring box to switch the termination switch to ON position. The termination switch is default set to OFF position.
Termination
RS232
RJ45-L
RJ45-R
Termination
ON/OFF
Fig 2.4.1
positions of the communication ports and termination switches