Communications Interface Description; Rs485 Communication - CanadianSolar CSI-75K-T40001-E User Manual

5 Electrical Connection
Close the wiring compartment in reverse order after completing wiring operations.

5.4.2 Communications Interface Description

The following figure shows the position of the communication wiring board in the inverter as well as the terminals
equipped for the wiring board.

5.4.3 RS485 Communication

The inverter is equipped with four groups of RS485 communication port for external communication connection, which
are RS485_1, RS485_2, RS485_3, and RS485_4.
The terminal block interface and RJ45 interface have the same function with only wiring manner different. Select either
interface for cable connection.
5.4.3.1 Single-inverter communication system
In case of a single inverter, select either terminal block interface (RS 485-1, and RS 485-3) or RJ45 interface(C1~C8) to
connect.
ON
120O
RS485 RS485
A1 B1 PE +12V A1 B1 PE +12V
RS485-3 RS485-4
USB
RS485-1 RS485-2
FIG 5-4 Communications Interface Description
FIG 5-3 Open the Wiring Compartment
SW1 SW2
OFF ON OFF
120O
METER/TRACKER DRY CONN CAN
Dry
Meter/Tracker CAN
contact
PH2
RS485
A1B1PE +12V A1B1PE +12V
RS485-3 RS485-4
DRM
RS485-1 RS485-2
FIG 5-5 Single-inverter communication system
M4
RS485
Meter/Tracker
PC
Logger
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