Rs485 And Plc Communication Connection - CanadianSolar CSI-185K-T600GL03-U Installation And Operation Manual

3. Installation
Figure 3.19 Copper aluminum transfer terminal
3) Leave the AC breaker disconnected to ensure it does not close unexpectedly.
4) Remove the 3 screws on the inverter junction box and open the junction box cover.
Figure 3.20 Remove the junction box cover
5) Insert the cable through the nut, sheath, and AC terminal cover. Connect the cable to the
AC terminal block in turn, using a socket wrench. Tighten the screws on the terminal block.
The torque is 7.4-14.6 ft.lbs .
Figure 3.21 Wiring with Neutral
.22.
Copper terminal of cable
flat gasket
spring washer
nut
4. Comm. & Monitoring
There are 5 communication terminals on the inverters.
COM1 is a 4-pin connector reserved for WiFi/Cellular datalogger.
2*RS485 ports are for RS485 communication between inverters.
DRM port is for DRM connection.
Meter/CT port is reserved for further development.

4.1 RS485 and PLC communication connection

Monitoring system for multiple inverters
Multiple inverters can be monitored through RS-485 daisy chain configuration.
PV Strings
Inverter
PV Strings
Inverter
PV Strings
Inverter
Figure . Multiple inverter monitoring system 4 1
NOTE
One of the RS485 and PLC communication methods is available.
PC monitoring
Datalogger
Internet
DC
RS485
(RS485)
.23.