Huawei SmartLogger3000 - Connecting the RS485 Communications Cable

6
Connecting the PE Cable
4.2
Connecting the RS485 Communications Cable
4.3
Port
Identifier
Description
COM1, COM2, COM3
+
RS485A, RS485 differential signal+
–
RS485B, RS485 differential signal
–
•
It is recommended that the RS485 communication distance be less than or equal to 1000 m.
•
The SmartLogger can connect to RS485 communications devices, such as a solar inverter, an
environmental monitoring instrument (EMI), and a power meter over the COM port.
•
Ensure that the RS485+ and RS485– terminals are respectively connected to the COM+ and
COM– ports on the SmartLogger.
To enhance the
corrosion resistance
of the ground
terminal, apply silica
gel or paint on it
after connecting the
PE cable.