4. Comm. & Monitoring
4. Comm. & Monitoring
Monitoring system for multiple inverters
Multiple inverters can be monitored through RS-485 daisy chain configuration.
Internet
Datalogger
PC monitoring
PV Strings
Inverter
PV Strings
PV Strings
Inverter
Inverter
Figure . Multiple inverter monitoring system
4 1
(
RS485
)
DC
RS485
There are 5 communication terminals on the inverters.
COM1 is a 4-pin connector reserved for WiFi/Cellular datalogger.
COM2 - COM3 are used for RS485 communication between inverters.
Both RJ45 and terminal block are provided for use.
COM4 or COM5 can be used for DRM connection.
Detailed connection please refer to 4.2 section.
.29.
.28.
4.1 RS485 Communication
RS-485 communication supports two connections methods: RJ45 connectors/ Terminal board
1. RS-485 communication through RJ45 connector
RJ45 port connection (See figure 4.2).
CAT 5E outdoor rated (cable outer diameter<9mm, internal resistance
≤
1.5
Ω/
10m) and
shielded RJ45 connectors are recommended.
Figure 4.2 RJ45 port
485
-
IN
485
-
O
UT
Figure 4.3 Strip the insulation layer and connect to RJ45 plug
Correspondence between the
cables and the stitches of plug
Pin 1: white and orange
;
Pin 2: orange
Pin
3: white and green；
Pin 4: blue
Pin 5: white and blue
；
Pin 6: green
Pin 7: white and brown
；
Pin 8: brown
Pin 1 with 4 and 2 with 5 are
used for communication connection
Pin 1 and 4 are connected with RS485+A
Pin 2 and 5 are connected with RS485 - B
1--8
RJ45
plug
RJ45
terminal
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
R S 4 8 5 + A
R S 4 8 5 - B
Use the network wire stripper to strip the insulation layer off the communication cable.
Using the standard wire sequence referenced in TIA/EIA 568B, separate the wires in the cable.
Use a network cable tool to trim the wire. Flatten the wire in the order shown in figure 4.3.
2. RS-485 communication through terminal board.
Figure 4.4
The cross sectional area of the conductor wire for terminal board connection should be
0.2-1.5mm.
The outer diameter of the cable may be 5mm-10mm.
NO
.
Port definition
Description
1
2
3
4
RS485A1,RS485 differential
RS485B1,RS485 differential signal-
RS485A2,RS485 differential
RS485B2,RS485 differential signal-
RS485A1 IN
RS485B1 IN
RS485A2 OUT
RS485B2 OUT
1
2
4
3
