User's Manual

Table Of Contents
SmartLogger3000
User Manual
4 Cable Connections
Issue 04 (2020-03-11)
Copyright © Huawei Technologies Co., Ltd.
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4.2.5 Connecting the RS485 Communications Cable
Context
The SmartModule can connect to RS485 communications devices, such as a solar
inverter, an EMI, a power meter, and a PID over COM ports.
Ensure that RS485+ is connected to COM+ of the SmartModule and RS485– is
connected to the COM– of the SmartModule.
Procedure
Step 1 Connect the RS485 communications cable.
Figure 4-17 Connecting an RS485 communications cable
Port
Silk Screen
Description
COM1, COM2, and COM3
+
RS485A, RS485 differential
signal+
RS485B, RS485 differential
signal–
Step 2 If devices need to be cascaded, cascade the devices and then connect them to the
SmartModule.